E1297 VOL. 3 Report Form on Environmental Impact of the Construction Project (Trial) Project Name: Wastewater Treatment Plant of Mendjin County Seat Construction Unit (Official Seal): The Water Undertaking of Mengjin County Compiled by National Environmental Protection Agency on May 28, 2005 Basic Information of the Construction Project Project Name The Wastewater Treatment Plant of Mengjin County Construction The Water Undertaking of Mengjin County Unit Legal Ma Daoxian Contact Xu Fupo Representative person Communication Address Mengjin County, Henan Province Tel: 0379-67958813 Fax: 67918001 Postal Code: 471100 Construction No. 13 Group in Niuhe Village southwest to Mengjin County Site Approval Authority Approval No. Construction Type and Code It belongs to other Nature Newly built of The Industry kinds of industry P99 It Belongs Covering Area 22,657 Veriscence Area 9,062.8 (M2) (in) Among which: The share of the Total Investment for Investment for Investment 5,101 Environmental 110 Environmental 2.16% (1 X 104 yuan) Protection Protection in (1 X 104 yuan) Total Fees for Predicted Evaluation 4 Prdic te December 2007 (1 x 04 uan)commissioning date (' xl04 yuan) Project Items and Scale: With a view to.accelerating the fundamental infrastructures in the downtown of Mengjin country, improving the urban environment and protection the water quality in Li river and Luo river, the Tap-water Plant of Mengjin County Seat plans to built a new Wastewater Treatment Plant of Mengjin County. In accordance with the requirements of Environmental Impact Evaluation of P.R.C and the No 253 decree of Regulation of Environmental Protection for Construction Project issued by the State Council, the Project shall be evaluated for its environmental protection. The wastewater treatment engineering comprises of the Wastewater Treatment Plant (WTP) and the supporting engineering of sewage pipes outside of the site, the construction period lasts one and half years and the total investment is 51.05 million yuan, among which, 32.19 million yuan will be invested for the in-site projects and the remaining 18.82 million yuan for the engineering of sewage pipes outside of the site. The funds can be raised in two ways, 24.80 million yuan of them are loaned from the World Bank through application while the remaining will be raised fiscal department of Mengjin County. The site of the WTP locates at the site near to the No. 13 group of Niubuhe Village, west to the downtown of Mengjin County, the newly-increased sewage pipe is 25.28 km. And the disposal capacity in the near future (in the year 2010) is 20,000 m'/d through the recommended processing technology of Obel oxidation ditch method. The tail-water after treatment will be used for irrigation and virescence as much as possible and the residual tail-water is discharged into the Lehe River. The major structures for wastewater treatment including the coarse screen room, fine screen room, inlet pumping station, votex grid removal chamber, anaerobic tank and Obel oxidation ditch, secondary sedimentation tank, sludge pumping tank, Chemicals addition room, sludge concentration and dehydration room and upkeep room, etc. See the project analysis in special subject analysis. The Original Pollution Condition and Major Environmental Problems Related to This Project: At present, there is no WTP in the downtown of Mengjin County, where the drainage system is the integrated system for both the rainwater and the sewage, and the sewage is discharged into the Lehe River and the natural ditches without treatment, the drainage system is mainly composed of open ditches and covered ones. Therefore, the original pollution condition and major environmental problems related to this Project are as follows: (1) As there is no wastewater treatment facility, the domestic sewage and industrial wastewater are discharged directly without treatment, which results in a serious environmental pollution. (2) The existing drainage facilities are mainly composed of drainage pipes and ditches, and the wastewater in which are serious leaked out, and thus cause the pollution of a certain degree to the underground water in the proximity. (3) The Construction for the drainage pipes is uneven and incomplete, the rainwater and sewage in parts of the downtown are not discharged from the road, which causes the overflowing of the rainwater and sewage and impact the normal life of the citizens. 2 Introduction to Natural Environment (Landform, Physiognomy, Geology, Climate, Meteorology, Hydrology, Vegetation, Biodiversity, etc.) 1. Geological Location Mengjin County locates in the northwest of Henan Province and shares boundaries with Yanshi City and Gongyi city in the east, Xin'an County in the west, the suburban area of Luoyang city in the south and Jiyuan city, Jili Region and Mengzhou city in the north, it positioned in the south bank of Yellow River at the meetings of the middle and lower reaches with the geographical coordinates as follows: 34'43' -34'57' of the north latitude and 112'12' -112'49' of east longitude. It is 55.52 km in east-west direction and 26.9 km in north-south width with area of 758.7 km2 The downtown of Mengjin County Seat is located in the valley of hills at the central county where is 174 km from Zhengzhou city, the capital of Henan Province, and 21 km from Luoyang city, the ancient capital of nine dynasties, and is about 310 to 357 m above sea. It is the political, cultural and economic center of the whole county. The recommended site of the WTP locates at the No. 13 group of Niubuhe village in the west of the downtown of Mengjin County Seat and is 500 east from the Jin-Gao highway. See attached drawing I for details. 2. landform and Physiognomy Mengjin County, located between the Luoyang basin and Jiyuan basin, downwards from the northwest to southeast with a comparatively big rises and falls. The form on the surface is dominated by the rock hills in the northwest, by terraces between the Yellow River and Luohe River in the east and southeast and by loess hills in the center. The Physiognomy in this region can, in accordance with its formation cause, physical make-up and shape characteristics, be divided as the rock hills caused by tectonic denudation, valley terraces by erosion and accumulation and loess hills by accumulation and erosion. 3. Geology and Conformation Mengjin County locates in areas of the fourth generation rolling terrain with poor underground water. As the underground water is mainly supplied by the lateral ground runoffs and atmospheric precipitation, however, due to the poor ground supplying condition and low-penetrability of the edio-pleistocene red loam that covers the whole region, the underground water is so poor that it is in the over-pumped status, therefore, it has no capacity for expansion. It can be see from the statistics data of 1997 that the underground water in the downtown has developed a water corn with the elevation of central water line of 218.18 m and the buried water line of 100.56 m in depth. 3 4. Climate and Meteorology Located in the warm temperate and semi-humid zone, Mengjin County has the continental monsoon climates in four distinct seasons that is characterized as follows: drought and wind prevail in spring, rain is centralized in hot summer, clear days with long time sunshine dominate in autumn and cold days with few rain and snow in winter. The average temperature in years is 13.8*C and the frost-proof dates in the whole years are 235. The mean rainfall is 646.6 mm that mainly centralizes in the period of June to September due to the obvious seasonal change, the rainfall in this period account for 60% of that in the whole year while the rainfall in December, January and February only amount to 5% or so, what's more the rainfall changes distinctly in different years because maximum yearly rainfall and the minimum one is respectively 1,035.4 mm (in 1964) and 406 mm (in 1956), the average yearly evaporating amount is 1,732.1 mm, of which, 358.5 mm is evaporated in June; the relative humidity is 63%, the maximum wind in the whole year is seven grade and maximum depth of the frozen soil is 0.5 m. The northeast wind prevails in summer while northwest wind in winter with the average speed of 3.81 m/s. 5. Hydrology The surface water system in Mengjin county belongs to the water system of Yellow River, in which, there are the Yellow River, Lehe river, Jinshuihe river, Tube river and Hengshui river. 1) The Yellow River. The Yellow River runs from the west to the east at the boundary of Mengjin County Seat with length of 56 km and drainage area of 384.5 km2 in the whole county, the average runoff, the maximum runoff and the minimum runoff of the Yellow river in years are 1,099.53 m3/s, 1,699.58 m3/s(in 1993)and 663.83 m3/s(in 1987)respectively, while the average sediment concentration and the maximum one in years of the Yellow River are 24.612 Kg/M3 and 99.026 Kg/M . And the average water line of the Yellow River in years is 135.239m. 2) Lehe River. Originated from the area of Huilu, Guxian in Hengshui Town, the Lehe river runs from north to south into Luohe river with 18.5 km in the County, its drainage area is 141.5 km2 with vertical gradient of 0.5%. It is the main river that receives the sewage water. As the water in upper reach of the river has shut-off, the urban sewages from Mengjin County dominates the riverway of Lehe river. 4 3) Jinshuihe River. This river runs from Xin'an County with 6.5 km in Menjin County, its drainage area and runoff in the whole year are 62.7 km2 and 0.3-0.5m3/s. 4) Henghe River. This is a dry river with 12.5 km of entire length. 5) Tube River. It is also a dry river with entire length of 15 km running from Guagoucun Village into the Yellow River. 6. Seismic Intensity The seismic intensity is Grade seven, and there was no serious earthquake in the past. Introduction to Social Environment (Social Economic structure, education, culture and cultural relics conservation, etc) 1. Population, Area and Economic Situation There are 226 administrative villages in 9 towns and 3 townships in Mengjin County with population of 440,000 in the area of 785.7 km2 in total. The constructed area in county seat is 6.9 km2 with residents of 66,000 in total, therefore, the per capita construction land is 105.0 M2, in accordance with the data of the gross industrial output in the period of 2002 to 2004 provided by the Tap-water Factory of Mengjin County, the gross industrial output value in 2004 is 0.54 billion yuan with average annual growth rate of 8%. 2. The Cultural Education, Medical-care facilities and Healthy situation in Downtown There are residential teachers and students of 21,495 and staff members of 1,292 in the schools in the planning region of downtown. The rate of university for compulsory education is ordinary; the beds in hospital in the panning region of county seat are 412, which is also ordinary capered with other places. There is no local infectious disease. 3. Introduction to Social Environment around WTP The recommended site of WTP locates in the thirteen group of Niubuhe village in which lives 23 families (of which 60 are planned to remove another place) with per capita land, garden of 1.2 mu and 0.2 mu respectively, the per capita income is 2,000 yuan per year. In the place 200 m east to the Site lives 13 families who are moved here from the county seat of Mengjin County, 1.5 km away northeast to the Site locates Nanling ecological garden of 300 mu, in which there are mainly planted Nanjing fir, pine, 5 banyan, bamboo, poplar juniper and etc. As it has the function of adjusting the climate and purifying the environment, it is the ideal place for people to make recreation and entertainment. There is no school, hospital, cultural relics required for conservation, ecologically sensitive spot or mine resource in the place I km away around the recommended site of WTP. 4. The overall Planning for County seat In accordance the Prospectus of Overall Planning for the County seat ofMengiin County Seat (2002 -2010), it is decided the development planning of Mengjin County Seat is as follows: (1) Planning Scope The planning scope covers 30 kM2 that reaches to BaoZhang, Zhaigou in the north, Mabusiwa and Taipingzhuang in the east, Xilongwa, Donglongwa in the south and Leyangdonggou in the west. See attached drawing I for details. (2) The Nature of County seat The Mengjin county seat is determined to develop as the political, economic and cultural centre of the whole county that is tourism satellite city in the suburban of Luoyang city with manufacturing as its dominant industry. (3) Scale of Population and land The constructed area in 2010 will hold 85,000 people in the land of 9.35 km2 with per capita land of IOin2. (4) Overall Outline of Urban Land In accordance with the land consumption in county seat , the geographic environment and traffic situation as well as the economic development in the proximity, the county seat - is divided into four main regions: Northwest region: it is covers the area north to the west Guihua Road, west to the Anju road, and is dominated by the grade-one pollution free industries, and the land for resident, multicipal and public facilities is also allocated in this region; North Central Region (mainly covering the existing constructed region): it is the area east to Anju road and north to Huimeng road, the land in this region are mainly for resident, administration office, commercial service and education as well as scientific research, etc. 6 South Central region: it locates in the area south to Huimeng road and north to Lingnan road and is the land for resident, administration office, commercial service, education as well as Virescence. South Region: this region is mainly for resident, grade two industry and part of which for public construction. (5) Planning for the project of Wastewater Treatment Pipe Outline: The pipes are arranged at the north side of the east-west road and east side of south-north road, adapting the lower side as its drainage outlet. The main pipes are in east-west direction while the general pipe runs from north to south into the WPT, through which, the sewage is discharged after treatment. WTP: it locates at south to the southern Ring road in southwest part of the downtown where near to the Lehe River; it covers land of 3 ha with disposal capacity of 20,000 t/d. (6) Environmental Planning Goal The goal of environmental planning is as follows: the downtown environment will be principally brought under control so that the natural ecological environment can come into benign circulation, and the environmental quality will develop towards the overall improvement. The prevention for industrial pollution will be intensified and the construction for fundamental infrastructure in downtown will be consolidated and completed; the investment for environmental protection accounts for 1.5% in GDP so that the sustained development for environment and social economy can be obtained. 7 Environmental Quality Situation Status Quo of Environmental Quality and Major Environmental Problems (Environmental Atmosphere, Surface Water, Underground Water, Acoustic Environment and Ecological Environment, etc) in the region where the Project Site locates: I. Environmental Atmosphere Quality Situation We have made a monitoring for the environmental atmosphere quality around the recommended site of WTP for three times at two monitoring spots on February 2, 2005. The first spot is located the group 13 in Niubuhe Village (the recommended Site of WTP) and the second spot at resident house of the migrants from Mengjin county (200 m east away from the planed WTP), see the attached figure 2 for arrangement of specific monitoring spots. The monitoring items are NH3, H2S and TSP with spectrophotometries of Nano agent, binary para- amidogen to aniline, and weight method as well. The minimum monitored values are 0.05 mg/Nm3 and 0.005 mg/Nm3 and 0.001 mg/Nm3 respectively. See the monitoring results in the follow Form: Form 1 Monitoring Results of the Environmental Atmosphere Quality unit: mg/M3 The first concentration value Daily mean value Items NH3 H2S TSP Monitoring I # 0.025-0.06 . 0.0025-0.009 0.191 spot 2 # 0.025 0.0025 0.198 Evaluation standard 0.20 0.01 0.30 Note: in case the concentration value is not monitored, it shall be subject to the half of the minimum values. It can be seen from the form I that the monitored values for NH3 and H2S at the two monitoring spots are satisfy the standard requirements of maximum concentration value of the harmful materials in atmosphere in residential community in the Sanitary Standard for Industrial Enterprise Designing, the TSP daily mean value shall be lower than the secondary standard in Quality Standard of Environmental Atmosphere GB3095-1996. The environmental atmosphere quality in this region are comparatively good. 2 Environmental Quality of Surface Water Chanhe River is the receiver of sewage from the downtown of Mengjin County, as the water in the upper reach is shut 8 While the water quality at the Section 2 # will be evaluated in accordance with the data in the year 2004 of the Luoyang Environmental Monitoring Station, see attached drawing 2 for the arrangement of monitoring sections and Form 2 for monitoring factors and results. Form 2 Water Quality Situation in Lehe River Ammonia Total Faecal BOD5 CODcr Monitonngfactors PH Value nitrogen phosphoru coliform (mg/L) (mg/L) (mg/L) s (mg/L) (Nunber/L) 1 # 7.88-8.07 143-162 326-338 26.8-29.7 2.94-3.03 23000 Monitoring 2# 7.23-8.01 4.1-43.8 20-74.1 3.0-20.3 / / section Averame value at 7.60 18.07 41.53 9.95 / / section 2# Evaluation standard 6-9 4 20 <1.0 02 _10000 Over-standar 1# - 34.75-39.5 15.3-15.9 25.8-28.7 13.7-14.15 1.3 dmultiple 24 - 0.025-9.95 0-2.71 2-19.3 / / It can be seen frorn the Form 2 that, excluding the PH value, the monitoring factors at Section 1# such as BOD5, COD, ammonia nitrogen, total phosphorus, and faecal coliform are beyond the standard III in the Standard for the Environmental Quality of Surface Water (GB3838-2002) by far, the main over-proof reason is the water in the riverway of Lehe river are thoroughly sewage from Mengjin County due to the shut-off at the upper reach. While the monitoring factors such as BOD5, COD, ammonia nitrogen, total phosphorus, and faecal coliform at Section 2# are also over-proof which cannot meet the standard III in the Standard for the Environmental Quality of Surface Water (GB3838-2002), however, the over-proof multiple of the pollutant at this Section decrease a little, the main reason for which is the self-purification of the Lehe river and the confluence of the water from Zhongzhouqu Ditch at the upper reach of Lehe river. 3. Quality of Underground Water We have made a survey of monitoring for the water quality in the wells of the recommended Site of WTP, the thirteen group of Niubuhe Village, on January 29, 2005, see the monitoring spots in attached drawing 2 and monitoring factors and results in form 3. 9 Form 3 Monitoring Results of Quality of Underground Water Faecal coliform Monitoring factors Total hardness (mg/L) NH3-N (mg/L) (numberjL) There is no faecal co]iform Monitoring values 343 0.05 founded Evaluation standard <450 40.2 43 It can be seen from the Form 3 that the monitoring factors such as the total hardness, NH3 -N and the number of total coliform can satisfy the requirements of the standard III in the Quality Standard for Underground Water (GB/TI4848-93), and the status quo of the underground water quality is comparatively good.. 4. Status Quo of Quality of Acoustic Environment We have made a day-around-night survey of monitoring for the status quo of acoustic environment at the 13 Group of Niubuhe Village (the recommended site of WTP) and the migration community in Mengjin County (200 m east to the planned WTP), and the Form 4 contains the monitoring results while the attached 2 demonstrates the monitoring spots. Form 4 Monitoring Results of the Acoustic Environment Unit: dB (A) Monitoring spots In the daytime At night The 13th group in Niubehe Village 40.7 34.5 Migration community 42.4 37.2 Standard 55 45 It can be seen from the Form 4 that the status quo of acoustic environment quality both in the daytime and at night at the two monitoring spots reach the standard I in the Standard of Environmental Noise in Downtown (GB3096-93) and the quality of acoustic environment in this region is in a comparatively good status. 5. Status Quo of Ecological Environment The recommended Site of WTP locates in the thirteenth Group of Niubuhe Village covering parts of farmland and garden. The plants in farmland is dominated by wheat and corn, while the apple is the major dominant fruit in the garden, and there is no group species of valuable and rare animal and plant 10 Main Goal of Environmental Protection (list the Protection Items and Grade) In accordance with the survey, there is no special protection objectives such as the cultural relics, resort, valuable natural sightseeing and species of valuable and rare propagation around the recommended Site of WTP, therefore, the projection objectives in this evaluation are the migrants from Mengjin county and the Lehe river (the residents of thirteenth group in Niubuhe river is planed to migrated to another place, and they shall not be the major protection objectives). The migrants from Mengjin county live at the places whose nearest aistance from the site of WTP is 200 m, the environmental atmosphere shall be protected according to the maximum concentration of the harmful materials in atmosphere of residential community (TJ36-79); and the protection grade for acoustic environment belongs to the Grade I in GB3096-93, while the Lehe river within Mengjin shall be protected according to the Standard III of GB3838-2002. 11 Standard Available I.The permitted maximum concentration of the harmful materials in atmosphere in residential community of Sanitary Standard for Industrial Enterprises Designing (TJ36-79) (for the first time) NH3 0.20 mg/Nm3, H2S 0.01 mg/Nm3 Environmental 2.Standard of Environmental Quality for Underground Water (GB3838-2002 Grade III) Quality PHValue6-9 COD<20mg/L BODs<4mg/L ammonia nitrogen <1.0mg/L Standard Total phosphorus 40.2 mg/L faecal coliform <10000 /L 3.Standard of Underground Water Quality (GB/T 14848-93 Grade III) total hardness(450 mg/L ammonia nitrogen <0.2 mg/L faecal coliform <3.0 /L 4. Standard of Environmenial Noise of County Seat (GB3096-93 Grade I) in the daytime: 55 dB(A) at night: 45 dB(A) 1. Standard of Pollutant Drainage of Urban WTP (GBI 8918-2002) Standard II for Form 4: NH3 1.5 mg/Nm' H2S 0.06 mg/Nm3 Standard of Standard IB for Form 1: COD: 60 mg/L BOD5: 20 mg/L SS: 20 mg/L Pollutant Drainage Ammonia nitrogen: 8 mg/L total phosphorus : 1.0 mg/L faecal coliform: 10000 /L 2. Standard of Noise at Boundary of Industrial Enterprise (GB12348 -90 Grade I) in the daytime: 55 dB(A) at night: 45 dB(A) The drainage amounts of COD and NH3-N in the sewage from downtown before and after the construction for the wastewater treatment project in Mengjin County and their changing situation are shown in the following Form Pollutant COD (t/a) NH3-N (t/a) At present 1650 144.4 After construction 438 58.4 Controlling varying amounts -1212 -86 Index for Total It can be seen from the form that the drainage amount of COD and NH3-N after the construction of Amount wastewater treatment project are 438 t/a and 58.4 t/a respectively, which is reduced by 1212 t/a and 86 t/a separately. In accordance with the Correspondence of Environmental Protection A2ency of Menejin County Seat on the Adiustment for Drainage Capacity of the Wastewater Treatment Proiect in Men2iin County (See attachment), the controlling index of the total capacity of the wastewater treatment project in Menjin county allocated by the Environmental Protection Agency of MendLin County Seat are COD of 450t/a and NH,-N of 60t/a, therefore, the planned total annual control capacity of the wastewater treatment project in Menviin County can be obtained. 12 Engineering Analysis for the Construction Project Introduction to Technical Process (See Diagram) See details in the part of specific subject analysis Major Pollution Processes Screen room, oxidation ditch, sludge storing pool, sludge treatment, ete malodorous gas screen room _ screening residue sedimentation tank " sediment sludge hydration residual sludge air-lift blower, submersible sewage pump, air compressor, returned sludge pump, sludge pump, butterfly-type rotational aerator and integrated device for sludge concentration I Noise. 13 The Major Pollutants Produced by the Project and their Predicted rainage Capacities Items . Concentration and Drainage types DraNage source Pollutant Name capacity produced concentration and before treatment capacity Screen rooms, NH3 0.7kg/h 0.7kg/h Atmospheric oxidation ditches and pollutant structures for sludge treatment H2S 0.003kg/h 0.003kg/h BOD 220mg/L 20mg/L 1606t/a 146t/a COD 400mg/L 60mg/L 2920t/a 438t/a Water pollutant Wastewater treatment SS 250mg/L 20 mg/L facilities 1825t/a 146t/a NH3-N 35mg/L 8 mg/L 255.5t/a 58.4t/a Total phosphorus 4mg/L 1.0 mg/L Totl hoshous29.2t/a 7.3t/a Screen rooms Screening residue 365t/a Solid waste Sedimentation tank sediment 365t/a Sludge dehydration Residual sludge 511 Ot/a room The major facilities that produces noise are air-lift blower, submersible sewage pump, air compressor, returned sludge pump, - residual sludge pump, butterfly-type rotational aerator, and Noise integrated device for sludge concentration, the intensity of the noise source is 75-85 dB (A) ,prevention measures for noise elimination, vibration damping and sound insulation are adopted and the noise can be decrease to the intensity of 20 dB (A) or so. Others Major ecological impact The permanent occupied land by the recommended WTP is 2,2657m2, among which, 18,357 m2 are farmland, 1,000m2 are garden and the remaining 3,300 m2 belongs to other kinds of land. The major damaged plants are wheat, apple trees which are planted by former, there is no valuable and rare propagation species or sensitive ecological spot, therefore, the construction for the project impose a small impact to the local ecological environment instead, it can improve the quality of water in Lehe river and Luohe river to a certain degree. Brief Analyse for Environmental Impact during Construction Period I Analysis for Pollutant Source The construction period for the planned wastewater treatment project will last one and half years, and the major pollutants are wastewater, waste gas, noise and abandoned soil that are produced during the construction for WTP and the pipe networks. (1 Wastewater The water pollutant that may impose impact to the water environment during the construction period are mainly composed of the domestic sewage produced by the constructors and the dirty water for cleaning the equipments, the major pollution factors are COD and SS. The output of domestic sewage is predicted as 0.05m'/A*d, if the average daily constructors are 150, they will produce 4,050m3 of domestic sewage during the construction period of one and half years. ) Waste gas The mechanical equipments that is used commonly in construction are excavator, pile driver, mixer, elevator and all kinds of haulage vehicles. The floating dust produced in the construction due to excavation, and transportation will make impact to the air quality of environment around by increasing the concentration of TSP in the environmental atmosphere. © Noise The noise source during the construction are various kinds of construction equipments and vehicles with the noise value between 85 and 100 dB(A). ) Construction rubbish and Household Garbage The construction rubbish during construction mainly comes from the waste materials such as waste bars, packing bags, leftover materials and waste brick, etc. in accordance with the analogue, the output of the construction rubbish is 6000 t. The overall output of the house garbage during construction is 65t. 2. Distribution of Sensitive Spots Alongside the Pipelines of the Network the major sensitive spots alone side the pipelines of network of this Project are composed of schools (i.e. No. I Mengiinxian Senior High School, No. 2 Meniinxiane Senior High School, the Middle School directly run by the County, the No. I elementary school, and the No. 2 elementary school) and hospitals (including the People's Hospital of Mengjin county, 15 TCM Hospital of Mengiin county, Hospital for public therapy of Mengiin County Seat and antituberculosis center of Mengjin County), residential community (such as Huimeng community, guicheng community, Nanwang Garden, and community for commercialised housing), PLA units (for example, zhoushan units and connonry team) and garden (Nanling Ecological garden), etc. see attached drawing 4 for detailed positions. 3 Anti-pollution Measure C Atmospheric Prevention Measures It is necessary to make a civic construction, therefore, measures for preventing dust such as spraying or covering the piled sands and stones and the carriage of the crushed aggregates with canvas (keep the closed transportation for each vehicle) or spraying water on the surfaces of soil roads, meantime avoiding handling he materials under the condition of dry and windy days which are easily produced the floating dust. During the construction for Pipe network, the construction site shall be enclosed appropriately. And the land excavated shall be filled timely, the abounded soil shall be transported away in time and the construction site shall keep distance form the sensitive spots so as to avoid the secondary floating dust imposing impact on the sensitive spots during construction. O Prevention measures for wastewater The domestic sewage produced by constructors shall be discharged after the treatment in the septic tank. While the slurry shall be recycled for re-use after precipitation treatment and the precipitated sludge will be transported outside. O Prevention Measures for Noise The construction unit shall use the low-noise construction equipments and methods, reasonably arrange the construction sites, it is forbidden to operate the high-noise equipment at the deep night. And the construction equipments shall be used as few as possible during construction at the sensitive spots, otherwise, the sound barrier fittings shall be temporarily set up in the proximity so that the quality of acoustic environment at the sensitive spots can be ensured and the construction near school may be arranged in the vacations. L prevention measures for building refuse and domestic refuse The building refuse and domestic refuse shall be reused possibly, those that cannot be reused shall be specific landfill for building refuse while the domestic refuse shall be disposed by the local environmental and sanitary departments. 16 D Prevention measures for Impact to Ecology and Plants The pipe network of this project is adopted to pave underground, which are mainly paved under the virescene belt or slow lanes with the broken road areas of 36,144m2 in total, while the temporary occupied land is 86,713 in2, and the earthwork needed excavation in the construction for pipelines is 108,432m3, and of which 104,255m3 shall be filled back and the remaining 4,177m3 will be abounded. The impact of the construction to ecology and plants are mainly presented by the damage to artificial plantations such as isolation strip of virescene, during which, the roots of the trees alongside roads may be broken and thus cause the death of the tree. Such impact factors shall be taken into account, the lines shall be optimized to avoid the density plantation sections so as to reduce the damaee to plantation the width of the workine surface shall be decreased possibly so as to reduce the impact to plantation and soil structure to the minimum degree; and the damaged greenbelt shall be recovered after the construction. E Prevention measures for impact to residential living and transportation The construction unit shall contact the competence departments for highway and transportation for their support before the construction so as to avoid affecting the existing transpiration facilities and to reduce the impact to the transportation on the highway around. The construction for pipe network shall be conducted in stages to avoid to affecting the transport due to the, over-large construction scale and construction period. In addition, the temporary paths shall be established parallel with the busy highway, meantime, transport warning signs and specific persons directing the transportation shall be arranged. The excavation, pipe-pavement and filling work shall be completed as soon as possible to ensure the traffic security for vehicles and pedestrian. As for the construction spots near to residential community, school or sensitive spot, the construction shall be appropriately arranged according to the working and resting time, in the same time, good job shall be done in the on-the-spot prevention work so that the normal living environment of the residence can be ensured. (2) Measures Preventing Water and Soil Loss The abandoned soil produced during construction shall be transported to the specific place or be used to block up the bottomland, and all temporarily occupied land shall be cleaned and harnessed after construction, such as the temporary structures shall be dismantled, the surface shall be cleaned and the bottomland shall be filled with soil, what's more the virescene work shall be conducted in time so as to minimize the water and soil loss. 17 I Settlement plan for Migrants The recommended Site of WTP will permanently occupy the land of residents in the thirteenth group of Niubuhe village, there are 60 persons in 23 families in this group with housing area of 2, 300m2, they are planned to removed to a more flatten land that is 500 m east to the present residence community, and there is no industrial enterprise within the 300 m around the new community that adiacent to the Jin-gao highway with good environment and convenient transport (see the picture for the information of the status quo of new community). In order to improve the living standard of the migrants after movement, compensation of 280 vuan/m2 will be conducted according to the status quo and the market at present, therefore, the fund for compensation of the removal housing will be 644,000, which is appropriated by the People's government of Menglin County Seat see details in the attachments of the commitment made by the people's government of Mengjin County Seat and of the settlement plan of the people's government of Cheneuan town, Menglin county. The impact to environment during construction belongs to short-term impact and will disappears after construction, it is considered by the evaluation to be accepted if we intensify the management during construction, do a good job in prevention for noise and floating dusty and transportation of abandoned soil as well as the recovery of the plantation. 18 Analysis for Environmental Impact during Operation The project will, after its completion, be operated by the Water Undertaking of Mengjin County, which is a stockholding enterprise. The organizational system of the WTP will be 36 persons, 25 of which will be the direct production staffs, 6 are accessory production staffs while the remaining 5 are managerial and technical members. The managerial method of this Plant will adopt the joint stock system. 1 Analysis for Impact to Environmental Atmosphere 1.1 Analysis for Impact of malodors gas In accordance with the pollution source determined with the engineering analysis, the speed of wind in the adverse direction at WTP is calculated as 3.81m/s in the terms of methods of area source. The NH3 and H2S with concentrations of 0.0552 mg/Nm3 and 0.0002 mg/Nm' respectively make the most contribution to the environmental impact to the residential community, they accounts for 27.6% and 2.0% standardized value. Therefore, the environmental atmosphere quality in the residential community around will satisfy the standard requirement after the construction and operation of WTP. The maximum concentration of the malodorous pollutant of NH3 and H2S produced by WTP at the boundaries of the Plant, under the conditions of yearly average speed wind and calm wind, are 0.1625 mg/Nm3 and 0.0007 mg/Nm3 respectively, both of which are lower than the Standard II in the Drainage Standard for the Pollutant of Wastewater Treatment Plant in Downtown (GB 18918-2002 see Form 4). 1.2 Distance for Sanitary prevention In accordance with the stipulations of Technical Method on Formulating for Drainage Standard of the Pollutant in Local Atmosphere (GB/TI 3201-91), The sanitary prevention distance between the production unit where the drainage source locates and the residential community shall be determined, by calculation, the sanitary prevention distance in this Project is 100 m. and there is no centralized community within the sanitary prevention distance after the removal of the residents in the thirteenth group in Niubuhe village. 2 Analysis for Impact to Water Environment The reduce rate of the drainage capacity for pollutants will be within 75-92% after the operation of WTP in Mengjin county, namely BOD5 will be reduced by 1,460t/a, COD by 2,482 t/a, SS by 1,679t/a, NH3-N by 197.lt/a and the total phosphorus by 21.9t/a. 19 The predicted concentrations of CODcr and BOD5 at the Section of Chanhe River that is controlled by the municipal department will be 7.11 mp/L and 2.5 1myfL after the operation of WTP, which will be reduced by 82.88% and 86.11% and can meet the requirements of the Standard for Environmental Quality of Underground Water (GB3838-2002 Grade III). And thus the quality of water in Chanhe River will be improved obviously and remarkable environmental results can be obtained from the Project. 3. Analysis of Impact to Acoustic Environment The major high-noised equipments in WTP are air-lifted blower, submersible sewage pump, air compressor, returned sludge pump, residual sludge pump, butterfly-type aerator and integrated device of sludge concentration, the intensities at the noise sources are within the range of 75-85 dB(A), which can be reduced by 20 dB(A). The predicted noise values at the boundaries of the Plant will fall within the range of 31.4-44.4 dB(A), which satisfy the requirement of the Standard of Noise at Boundaries of Industrial Enterprise (GB12348-90 Grade I). Since there is no residential spot within the areas 200 m away from WTP, the impact of noise to the external environment is insignificant. 4. Analysis of Impact of Solid Waste During the normal operation of WTP, there will be solid waste produced at the screen rooms, sedimentation tanks, and sludge dehydration rooms, the solid waste are mainly screening residue with output capacity of It/d, sediment of It/d and residual sludge of 14t/d. The screening residue and sediment will be transported to the landfill for burying, while the residual sludge shall be considered to use as compost or be used comprehensively while burying. 20 Planned Measures and Anticipated Treatment Results of the Construction Project Items Anticipated Treatment Drainage Sources Pollutant Name Prevention Measures Results Type Screen rooms, oxidation ditches, The concentration at the Atmospheric sludge storing tank and NH3. H2S boundaries shall be lower Pollutant structures for sludge than Standard II treatment BOD5. COD. SS. NH3 The drainage concentration Wastewater treatment BO, O.S,N,With disposal technique Tedang ocnrto Water Pollutant -N, total phosphorus . of pollutant shall reach facilities of Obel oxidation ditch standard Screen rooms Screening residue No stockpile inside of the Solid Waste Sedimentation tank sediment Burying Site Sludge pumping Residual sludge station If the sound isolation measures are adopted for the high-noised equipments in this Project. The noise at the Noise boundaries around the Site can satisfy the Standard. Others Ecological Protection Measures and its Anticipated Results: Greenbelts are specially arranged in the recommended Site of WTP, and the areas at boundaries around the Site will be thoroughly afforested and beautified so that the virescene area in the Site will cover 9,062.8m2 with virescene rate of 40%. In consideration with the drainage of malodorous pollutants of WTP, it is advised in this Evaluation that the trees that can strongly prevent the malodors such as H2S and NH3 shall be given priority to be planted in the greenbelts at the boundaries around the Site as well as the areas among the production region and office region so as to reduced the diffusion of the malodor, the selected trees may be abele, acacia, paulownia, mulberry, elm, juniper, contorted hankow willow, pentangular maple, chinar, Cathay poplar and Canada poplar 21 Conclusion and Suggestion Conclusion 1. The wastewater treatment project in Mengjin County belongs to the projects of Environmental protection and satisfies the requirements of the Policies of Urban Wastewater Treatment and Pollution Prevention Technology and the Determination of Communist Party Committee and People 's Government of Henan Province on Acceleration for urbanization Process. 2.Status Quo of Environmental Atmosphere Quality: the monitoring values of NH3 and H2S at the monitoring spots satisfy the requirement of the permitted maximum concentration of the harmful materials in atmosphere over residential community in Sanitary Standard for Industrial Enterprise Designing (TJ36-79), the TSP daily mean value is in accordance with the secondary standard in Quality Standard of Environmental Atmosphere GB3095-1996. and the status quo of the environmental atmosphere quality in this region are comparatively good. 3. Status Quo of Environmental Quality of Surface Water: The qualities of water at both section l# and 2# of Lehe river cannot reach the Standard of Environmental Quality Standard of Surface Water (GB3838-2002 Grade III), the reason that the quality of water at Section 1# cannot reach the Standard is because the Lehe river is filled with sewage from the Mengjin County due to the water shutoff at the upper reach of Lehe river; while the quality of water at Section 2# is a little better because of the self-purification of the Leheriver. 4. Status Que of Underground Water Quality: All of the values of total hardness, NH3-N and total faecal coliform of the water in wells at the Site of planned WTP reach the requirement of Standard of Underground Water Quality (GB/T/4848 -93 Grade III), therefore, the status quo of underground water quality is comparatively good. . 5. Status Quo of Quality of Acoustic Environment: the Environmental noise at the monitoring spots in the daytime and at night satisfies the requirement of Standard of Environmental Noise at Urban Area (GB3096-93 Grade 1), and the status quo of acoustic environmental quality in this region are comparatively good. 6. Analysis of Impact of Environmental Atmosphere: The maximum values of NH3 and H2S contributing to the nearest residential spots accounts for 27.6% and 2.0% of the standard values respectively. The quality of environmental atmosphere in the proximity of residential spots still satisfy the requirement of the Standard after the completion and operation of WTP, because the maximum values of both NH3 and H2S at the boundaries of the Site lower than the standard of the Drainage Standard of Pollutant of WTP in Towns (GBl8918-2002, see Grade II Standard in Form 4). There is no centralized residential community within the sanitary prevention distance of 100 m after the removal of the thirteenth group of Niubuhe village. 22 Which are reduced by 82.88%, 86.11% respectively, therefore the concentration of CODcr and BOD; meet the demands of the Standard of Environmental Ouality of Surface Water (GB3838-2002 Grade III), it can be concluded from the above data that the environmental results of this proiect is remarkable because the quality of water in Lehe river are obviously improved and the drainaee of tail water from WTP will not pollute the source of underground water. 8. Analysis of Impact of Acoustic Environment: the predicted values of the noise at boundaries of the Site will fill within the range of 31.4-44.4 dB(A), which reach the standard I of the Standard for Noise at the boundaries of Industrial Enterprise (GBl2348-90) both in the daytime and at night. As there is no residential spot within the areas 200 m away from the Site of WTP, the impact of noise to the external environment is insignificant. 9. Analysis of Impact of Solid Waste: the major solid wastes produced during the normal operation of WTP are mainly screening residue with the output capacity of I t/d, sediment of I t/d and residual sludge of 14 t/d, all of them will be transported to and buried at the landfill. 10. The deposal capacity of the WTP is 20,000 m3/d, which can satisfy the demand of disposal amount of the urban sewage in 2010, and thus the disposal scale is reasonable. 11. The adaptation of the treatment methods of Obel oxidation ditch based on the inlet water quality can make the pollutant drainage reach the standard, so the disposal technique is reasonable, too. 12. The recommended Site has more advantages than the spare Site, and the location of WTP is reasonable, so is the horizontal arrangement of the Site. 13. The investment for the prevention of secondary pollution of this project is 1.10 million yuan, accounting 2.16% in total. 14. The residents in 23 families at the recommended site of WTP is required to remove to the place 500m east to the present residential place, and the compensation of 644,000.00 yuan will be conducted by the People's Government of Mengjin County. 15. The Water Undertaking has publicized the information about the project at the local website and newspaper and organized twice the public to take part in the workshop. And most of the participants agree to the construction of this Project with the hope of constructing it as soon as possible, meanwhile they also put forward their demands for issues such as minimizing the adverse influences during construction and operation of the Project, preventing the occurrence of secondary pollution, the migrants settlement and land compensation, etc. 23 16. The drainaee capacity of COD and NH,-N after the completion of the wastewater treatment project will be 438 t/a and 58.4 t/a respectively, while the controllable index for the total amount of COD and NH3-N allocated by the environmental protection agencV of Menaiin County Seat to the WTP are 450t/a and 60t/a respectively, therefore, the yearly total control aim can be obtained accordine to the correspondine plannine level of the wastewater treatment proiect of Meneiin County. Suggestions: 1. the new sensitive spots such as residential community or school shall not be rebuilt within the range of sanitary prevention distance of WTP, and the planned west ring road shall be constructed outside of the sanitary prevention distance. 2. The wastewater entering into the WTP from enterprises shall meet the drainage standard III of the Comprehensive Drainage Standard of Wastewater (GB8978- 1996 see Form 4). 3. The self-measuring device, automatic proportional sampling unit and COD on-line monitoring fitting for wastewater amount shall be equipped at the discharging outlets of the WTP. 4. The propagandization for intensifying the citizen's concept of environmental protection shall be conduct by advocating the phosphorus-free detergent so as to reduce the phosphorus drainage amount. 5. The tail water shall be used for irrigation, forestation, spraying the road and municipal usage after treatment, then the residual tail water can be discharged into the Lehe river so as to decrease the drainage of sewage into the Lehe river. 6. The methods of comprehensive usage for the residual sludge shall be extensively developed to reduce the burying sludge amount. 7. The chlorinator shall be adapted the one with higher security degree and the management for chlorine storage shall be intensified, and meanwhile the staff members shall be intensified in security education and technology so as to avoid the occurrence of chlorine accident. 8. It is necessary to conduct the civic construction during the period so as to avoid the influence to the sensitive spots and the damage to the ecological environment. 9 The ventilation system shall be installed with the item screen, the sludge tank as well as the sludge treatment device. In summary, this project belongs to the one of environmental protection with the reasonable Site, the sufficient capacity to meet the demands of the development of Mengjin County, and the reasonable processing technology and horizontal arrangement in Site, what's more, this project can improve the environment of surface water at downtown and has no pollution to the source of underground water. Therefore, the Project, under the condition that the above evaluation is put into place, is workable from the view of environmental protection. 25 Subject Analysis on Environmental Impact of Wastewater Treatment Project in Mengjin County Luoyang Design & Research Institute of Environmental Protection March of 2005 Preface In accordance with the requirements such as "the centralized treatment facilities for urban wastewater shall be planned to construct in the cities at national level", and "the disposal rate of wastewater in the cities at national level shall not be less than 60% in 2010" in the Policies of Urban Wastewater Treatment and Pollution Prevention and Treatment Technology (Jiancheng [2000] No. 124) and the requirement of "the Wastewater Treatment Plant (WTP) shall be established in all towns of the whole province in .2007" in the Determination of the Communist Party Committee and the People's Government of Henan Province on Acceleration for Urbanization Process (Yufa[2003] No.9 .), the Water Undertaking of Mengjin County is planned to raise funds of 51.01 million yuan (24.80 million yuan of which will be loaned from the World Bank) for the construction of a new wastewater treatment project in Mengjin County. With the development of the city, the drainage capacity of the urban sewage is also on increase, which results in a greater and greater impact to the urbai environment. As there is no a WTP in Mengjin county at present, the wastewater is directly discharged into the water system without treatment, which lead to a pollution to the surface and groundwater in urban area, therefore, the urban water pollution that becomes more and more serious is not only one of the main factors that affects and restricts the urban construction, commerce and trading as well as the tourism development in Mengjin County, but also leads to the adverse impact to the quality of water in Chanhe river and Luohe river. Therefore, the newly-built wastewater treatment project will not only be beneficial to the urban construction of Mengjin county, but contribute to the improvement for the environment in the valley of Yellow River so as to achieve the sustained developments of economy, society and environment. In accordance with the requirements of the Environmental Impact Evaluation Law of PRC and the Regulations of Environmental Protection for Construction Project (No. 253 Decree of State Council), it is necessary to make an evaluation of Environmental Impact for this project. Therefore, the Water Undertaking in Mengjin County entrusted the Luoyang Designing Institute of Environmental Protection to undertake the Environmental Impact evaluation for this Project. In the light of the requirements of the Provincial agency of environmental protection, the report form of Environmental Impact and analysis on the subject of Environmental Impact of this Project shall be compiled. We compiled the report form and subject analysis for the environmental protection of this project on the basis of on-the-spot investigation, data collection and monitoring. And our thanks go to the environmental protection agencies at the provincial, municipal and county level for their help and support during compiling. 1. Compiling Basis 1.1 Legal Basis (1) Environmental Protection Law of PRC (1989.12.26) (2) Environmental Impact Evaluation Law of PRC (2003.9.1) (3) Prevention and Treatment Law of Solid Waste Pollution of PRC (1995.10) (4) Prevention and Treatment Law of Air Pollution of PRC (1995.8) (5) Prevention and Treatment Law of Environmental Noise of PRC (1996.10.29) (6) Prevention and Treatment Law of Water Pollution of PRC (1996.5.15) (7) Regulations of Environmental Protection for Construction Project (the No. 253 Decree of State Council) 1.2 Technical Norm (1) Technical Guidance of Environmental Impact Evaluation *Introduction (HJ/T2.1 -93) Technical Guidance of Environmental Impact Evaluation * Atmospheric Environment (HJ/T2.2-93) iii Technical Guidance of Environmental Impact Evaluation * Surface Water Environment (HJ/T 2.3-93) (4) Technical Guidance of Environmental Impact Evaluation * Acoustic Environment (HJ/T2.4-1995) (5)Technical Guidance of Environmental Impact Evaluation * Ecological Impact of Non-pollution (HJ/T19-1997) 1.3 Documentation Basis 2 (1) Notification of the People's Government of Henan Province on Acceleration for the Collection of Wastewater Treatment in Big Cities and Promote the Development for the Industrialization of Urban Wastewater Treatment (Yuzheng [2003] No. 7) (2) Determination of the CPC and People's Government of Henan Province on Acceleration for Urbanization (Yufa [2003] No.9) (3) Policies on Urban Wastewater Treatment and Pollution Prevention and Treatment (Jianceng [2004] No. 124) (4) Notification on Acceleration for Management of Environmental Impact Evaluation for the Construction Project Aided by Loan of International Financial Organization (Huanjian [1993] No. 324) (5) Overall Planning of Mengjin County seat (2002-2010) (6) The Tenth Five-year Plan and Future Plan in 2015 for Environmental Protection in Mengjin County (7) Feasibility Study Report of Wastewater Treatment Project of Mengjin County Seat (8) Power of Attorney and Contract of Water Undertaking of Mengjinn County on Wastewater Treatment Project of Mengjin County Seat 2. Project Analysis 2.1 Introduction to the Project Project Name: Wastewater Treatment Project of Mengjin County Seat Construction Items: WTP and Supporting Project of Sewage Pipe Network outside of the Site Construction Site: The planned WTP is in the Area resided by the thirteenth group of Niubuhe Village in Chengguan town, Mengjin County (the recommended Site) See details in the attached drawings I. Treatment Capacity and Process: In accordance with the Feasibility Study Report of Wastewater Treatment Project of Mengjin County Seat, the treatment capacity of WTP in the near future (by the year 2010) is 20,000 m /d, and the treatment process is recommended with the method of Obel Oxidation Ditch. 3 Total Investment: 51.01 Million yuan Staff members: 36 persons Water Supply and Drainage: The inlet water of WTP is supplied with the city water while the domestic and production sewage it produced will be enter into the sludge pumping station first and then lifted into the wastewater treatment system for disposal, and direct drainage to outside is forbidden. Service Scope: The arrangement area of pipe network in the near future (by 2010) covers the areas north to the Lingnan Road (which is the constructed region) and the region encompassed by Lingnan road, West Baihe road and Xixia road with 85,000 persons in the controllable area of 8.14km . 2.2 Scale Determination 2.2.1 Status quo of Water Amount and Instigation of Pollution Source The supplying source of water for Mengjin County Seat is the groundwater through the water supplying system that is composed of self-service wells of the Water undertaking and some units. In accordance with the data provided by the Water Undertaking of Mengjin County, the Water Undertaking in 2004 supplied 2.96 million m 3/a with average daily capacity of 8,100 m 3/d, among which 6,000 m3 /d is supplied by the self-service wells, therefore, the average daily supplying capacity in 2004 totaled 14,100 m3/d and the drainage capacity of sewage of Mengjin County Seat will be 11,300 m 3/d in terms of the drainage amount is calculated as 80% of the supplying amount. In accordance with the reporting and registration for blow-down with the environmental protection agency of Mengjin county in 2004, the information of the sewage drainage of major blow-down enterprises in Mengjin county can be seen in the table 2-1. Table 2 -lInformation of Sewage Drainage of Major Blow-down Enterprise 4 Drainage Capacity of Drainage Capacity of Enterprise Drainage targets Industrial Sewage (m3/a) COD (kg/a) Discharged into Mengjin Yongxin Special Steel Factory 2500 800 Dongzigou ditch Discharged into Mengjin County Flour Factory 320 96 Dongzigou ditch Hospital and Care Institute for Women and Discharged into 2400 237 Children in Mengjin County Dongzigou ditch Mengjin County Hospital for Public Discharged into 9673 2590 Therapy Dongzigou ditch Discharged into The People's Hospital of Mengjin County 11680 2800 Dongzigou ditch Shenggu Wire Frame Match General Discharged into 250 91 Factory of Luoyang City Dongzigou ditch Discharged into Chengguan Foodstuff Management Office 3650 4400 Dongzigou ditch Discharged into TCM Hospital of Mengjin county 20000 2260 Xiayuangou ditch Luoyang Changfeng Door-window Co., Discharged into 240 72 Ltd Xiayuangou ditch Shunda Door-window of Infill Panel Discharged into 105 33 Factory of Luoyang City Xiayuangou ditch Mengjin County General-purpose Mechine Discharged into 6700 2500 Factory in Henan Province Xiayuangou ditch Hualong Motor Manufacture Co., Ltd of Discharged into 6500 2160 Mengjin county Xiayuangou ditch Discharged into the Hoggery 5200 3650 east Mengzhuangou ditch Total 69218 21689 5 2.2.2 Water intake scope The intake scope of first-stage Project covers an area of 8.14 km2 encompassed by the east ring road in the east, west ring road in the west, Xixian road in the south and Huanghe road in the north, which mainly receives the wastewater of urban sewage discharged into the Dongzigou ditch, Xiayuangou ditch and east Mengzhuangou ditch, as well as the sewages from the above-mentioned enterprises and hospitals (see table 2-1 for the drainage information of the major blow-down enterprises and hospitals in the intake ared). It can be seen form the table 2-1 that the drainage capacities of those enterprises and hospitals are 69,218 m 3/a and 230 m3 /d, accounting for 2% of the total, therefore, the main sewage discharged from Mengjin County seat is domestic sewage featured with the pullution factors of COD, BOD5, SS, NH3-N and total phosphorus, etc. 2.2.3 Prediction for the Water Demanded In accordance with the FST, the prediction method for the wanted water shall be adopted the separate prediction method, i.e. the water consumption for living, industry shall be separately predicted, see the table 2-2 for the prediction results of the water demanded in 2010 Mengjin County seat. Table 2-2 Prediction Results of the Water Demand in 2010 Water consumption Remarks Items capacity ( I X 104M3/d) The planned population of Mengjin County seat will be Living water 1.19 85,000 in 2010 and the average daily water consumption capacity c u oshall be calculated in the terms of 140L/person*day The total industrial output value in the County Seat will be Industrial water 1.88 0.86 billion yuan in 2010 and the water consumption capacity consumption will be calculated in the terms of 80m'/10,000.00 yuan Other Water consumption (such as transport facilities, municipal use, environmental sanitation, virescenece, the leakage Other water 0capacity of the wipe network, self-consumption and the consumption unpredicted consumption) shall be calculated in the terms of 20% of the sum for the living water consumption capacity and industrial water consumption capacity Average daily water 3.68 consumption 6 2.2.4 Prediction for Sewage Capacity The prediction for the sewage capacity will adopt the method of drainage coefficient, in accordance with the Norm of Outdoor Drainage Designing; the urban sewage capacity shall be calculated in the terms of 80% of the water supplying capacity, in the case that the drainage capacity of Mengjin County seat in 2010 is 29,4000 m 3/d, therefore, the wastewater entered into the WTP will be 20.600 m 3/d in the terms of the intake rate of 70%. 2.2.5 Scale Determination In accordance with the above prediction results and combining with the local actual water supplying capacity and economic strength, as well as considering the uncertain factors that may occur during the urban development, the construction scope of the WTP in 2010 shall be moderately determined as 20,000 m 3/d, which conforms to the disposal capacity of the WTP of Mengjin County seat that is determined in the Prospectus of overall plannin2 of Meniin County seat (in the range of 2002-2010). 2.3 Determination for the Water Qualities of Inlet and Outlet Water 2.3.1 Quality of Inlet Water The sewage of Mengjin County seat at present is discharged into the Dongzigou ditch, Xiayuangou ditch and the east Mengzhuanggou ditch (accounting 90% of the total), among which, the drainage capacity of Dongzigou Ditch accounts about 50% of the sum of the three ditches, which mainly comprises the domestic sewage and the factory sewage from the Mengjin Yongxin special steel factory, Mengjin flour factory, the hospital and care institute for women and children of Mengjin county, Mengjin hospital for public therapy, the People's hospital of Mengjin county, Shenggu wire-frame match general factory and Chengguan foodstuff management office, etc. the capacity of Xiayuangou ditch accounts for 45 % of the sum of the three ditches, which mainly collects the domestic sewage and the factory sewage from the TCM hospital in Mengjin county, Changfeng door-window factory of Luoyang city, Shunda door-windown of infill panel factory of Mengjin county, the general-purpose machine works of Mengjin county and Hualong motor manufacture Co., Ltd. etc. while the capacity of east Mengzhuanggou ditch only accounts for 5% of the 7 sum, as there is a few residents in this region, the capacity of the domestic sewage is small, too. However, there are several hoggeries there, and sewage from which are directly discharged into the Chanhe river without treatment, the sewage in the drainage mouth of east Mengzhuanggou ditch finally disappears through infiltration, evaporation alongside the ditches. We have made some samples at the above mentioned drainage mouths for monitoring on January 29 and 30, 2005, meanwhile, analogised them with the actual quality of the sewage in other cities in this province. See the monitoring and analogue results in table 2-3. Table 2-3Monitoring and Analogue Results of Qualities of Inlet Water mg/L Faecal coliform Name pH BOD5 COD SS NH3-N NP (nmuberL) Dongzig 29 7.74 201 384 216 29.9 3.78 2300 ou ditch 30 7.92 213 402 247 33.6 3.89 - Xiayuang 29 7.93 183 351 206, 29.4 3.86 96000 ou 30 8.25 199 383 244 34.1 3.94 East 29 8.45 216 401 239 34.4 3.98 2300 Mengzhu 30 8.32 222 438 250 36.6 4.17 an ditch Wangxinzhuang / village of / 160 421 300 / / Zhengzhou Xuchang city / 105 300 / / / / Zhongyuan oil / / 109 242 200 / / field Nanyang city / 170 360 280 / / / The West of 161 416 266 38.3 6.76 Luoyangjian brook It can be seen form the above table that the three drain mouths in the County Seat has 8 concentration ranges of the pollution factors such as BOD5 of 183-222 mg/L, COD of 351-438 mg/L,SS of 206-250 mg/L,NH3-N of 29.4-36.6 mg/L and the total phosphorus of 3.78-4.17 mg/L, while the concentration range of qualities of the inlet water of five WTPs in our province are BOD5 of 105~170 mg/L, COD of 242-421 mg/L, SS of 200-300 mg/L, NH3-N of 38.3 mg/L and total phosphorus 6.76 mg/L. In the li2ht of the index of the pollutants in domestic sewage in the Norm of Outdoor Draina2e Designin2, the quality of the demotic sewage are as follows: BOD5 within 138.41-242.21 mg/L, CODcr with 276.82-484.42g/L, SS within 242.21- 346.02 mg/L, NH3-N within 55.36 mg/L and the TP within 6.09 mp/L. in accordance with the' Comprehensive Drainage Standard of Sewa2e (GB8978-1996), The wastewater discharmed by the enterprises to the urban WTP shall be meet the above Category III, and the permitted maximum draina2e concentration are: BOD5: <300 mg/L, CODcr: <500 mg/L and SS<400 mg/L A spare room shall be reserved for the designed quality of inlet water of WTP so as to meet the change of the quality, after the negotiation with the unit of FSR compiling and in consideration with the characteristics of the industrial development Mengjin County, the quality of inlet water of WTP of Mengjin County seat are determined as follows: BOD5: 220 mg/L, COD: 400mg/L, SS: 250 mg/L , NH3-N: 35 mg/L, TP: 4 mg/L, faecal coliform: 96000 /L 2.3.2 Quality of Outlet Water The treated tail water of the WTP of Mengjin county will be finally discharged into the Chanhe river, which belongs to the Category II I aquatic area according to the division of the function of the water environment of Luoyang city, and where the quality of discharged water shall be reach the Grade IB of the Drainage Standard of Pollutant of Urban WTP (GBl8918-2002), see the qualities of the inlet and outlet water as well as Elimination rate of the pollutants of WTP. 9 Table 2-4 The Qualities of Inlet and Outlet Water and Elimination rate of Pollutant Faecal BOD5 COD SS NH3 - , P Items PH coliform mg/L mg/L mg/L N mg/L mg/L (number/L) Inlet water 7-9 220 400 250 35 4 96000 quality Outlet water quality 6-9 <20 460 420 48 1 10000 (implementation standard) Elimination rate >90.9 >85 >92 >77.1 >75 >89.6 (%)____ _ 2.4 Selection for Wastewater Treatment Technology In accordance with the FSR, the WTP is planned to adopt the workable one from the two methods of Obel oxidation ditch and A2/O after technological comparison. 2.4.1 Obel Oxidation Ditch Method The technology of Obel oxidation ditch is developed by the National institute of water research of south Africa and is improved and propagandized for application in the U.S.A, up to now, there are more than 600 completed Obel oxidation ditches. the major characteristics of the technology include: 0 each oxidation ditch is composed of three ellipse channels and the sewage enters the tank through the external channel, then enters the middle and internal channels in turn and comes out to the secondary sedimentation tank. 0 the butterfly-type rotational aerator is equipped at each channel. the volume of the external ditch accounts for about 50 - 55% of that of oxidation ditch with the capacity of dissolved oxygen of 0- 0.5 mg / L, the main biological oxidation, denitrification and most of nitrifiction process are completed in the external ditch, therefore, the dissolved oxygen concentration in the external channel may be 0 or the microorganism can be kept for realizing Phosphorus. The dissolved oxygen concentration in middle channel is 1.0 mg/ L, 10 where the residual BOD5 can be further eliminated and the nitrification can be continued until completion. While the dissolved oxygen concentration in the internal channel is 2.0 mg/ L, which can ensure there is enough dissolved oxygen carried in the outlet water to the secondary sedimentation tank and the phosphorus can be intaken under the enough oxidation condition. The allocation like this type can ensure the Obel oxidation has a high function of denitrogenation and dephosphorization. Q the butterfly-type rotational aerator are made of polystyrene material, and the triangular gear knots are densely cover the surface of the tray, which ensure the sewage can be broken into the fine spray when the tray contacting with the sewage, so that oxygenation capacity and admixture capability are improved. And the oxygen supply capability and power consumption of it can also be adjusted through the regulation of the rotational direction of the tray, the immersion length, the rotational speed and the number of the trays. ( in accordance with the stay time. The sewage cannot enter into the middle channel only after flowing for 150 to 250 circles in the external channel. where the sewage passes the oxygen zone and oxygen-free zone for 600 to 1000 times And complete the high-speed exchange of the oxygen-contained and the oxygen-free sewages. as the average dissolved oxygen concentration in the external channel is very low even to 0, the transmission of oxygen is completed under the condition of oxygen depletion, which improves the transmission efficiency of the oxygen and achieves the purpose of energy saving. ( owing to the high-speed loop interchange, the sewage in the external channel will be mixed with the newly entered raw wastewater while denitrifying and nitrifying and thus it ensure the sufficient carbon source.Z as the sludge age is relatively long and the amount is little, the sludge digestion system can be omitted under the condition that sludge prone to the oxygen stabilization. Z the Obel oxidation ditches is generally designed with low load and high-degree of MISS can be maintained on most occasions, and the temporary shock load cannot restrict the microorganism; as the circulation volume in the ditch is as large as dozens of times even to hundredfold of that of the inlet water. Therefore, each channel features the characteristics of complete mixing in the fluid state. So the Obel oxidation ditch has the characteristics of complete-mixing reaction tank and the plug-flow reaction tank, which has the strong portative power for shockproof and the strong flexibility that are easy to adapt the variation of the requirements of several inlet water and outlet water. 11 The ditch of this type is equipped with the butterfly-type rotational tray of high power efficiency, comparing with other types of ditches such as binary-channel ditch, triple-channel ditch, the Obel oxidation ditch is used more widely in China due to its lower power consumption, fewer machines and simpler operational management that requires no managerial staff with high-level technology. The Projects in service with such Ditch include Beijing Daxing WTP with capacity of 80,000 m3/d, Shandong Weifang WTP with capacity of 100,000 m3/d and Shandong Laixi WTP of 40,000 m3 /d, all of them achieved the satisfactory disposal results. 2.4.2 A2/O Method A2 / 0 technology is a domestically developed technology comprising the anaerobic tank---anoxybiotic tank---aerobic tank that can complete the denitrification and dephosphorization simultaneously through biological treatment. ( the A2 / 0 technology achieves a fairly good disposal results because there are quite a few projects in service at home, which have accumulated a comparatively rich actual experiences and thus make its technology is mature enough for relying on. ( The alternative operation of the anaerobic tank, the anoxybiotic tank and aerobic tank can realize the aim of organism elimination, dephosphorization and denitrification. 9 The disposal result of the technology of this kind is comparatively good and its operation is more stable. ( The strong buffer capability of this kind of ditch ensure it to sustain the shockload of water mass and quantity., and ® the main shortcoming of this technology is that it must be equipped with more structures and its complicated process is applicable to the large-sized WTP. 2.4.3 Comparison of Designs See Table 2-5 for the Comparison situation between the Technology of Obel Oxidation Ditch and the A 2/0 one. 12 Table 2-5 Comparison for Advantages and Disadvantages of the Two Technical Designs. Design Advantage Shortage E it needs fewer structures in the simpler K its power consumption is more technological process; E the disposal result is than A2/0 technology but less than good and stable; E fewer machines adapted in other kind of oxidation ditch; and K Technology of this technology leads to a simpler operational it covers a bigger area of land. Obel Oxidation management; 0 its strong buffer capability can Ditch sustain the shockload of water mass and quantity, and the sludge digestion system may be omitted. i this technology enjoys the mature and reliable E its technical process and designing theory and rich actual experiences; K operational management are The quality of the water treated with this comparatively complicated F A2/OTechnology technology is fairly good and the operation of the investment for the project is this technology is more stable; E the unit power more than that for others, and I it consumption is less than other technologies, and needs more structures of I it occupies less land. wastewater treating. Summarizing the above comparison, it can be concluded that the technology of Obel Oxidation Ditch is simpler in its technical process, stable in its operation and convenient in its management, comparing with the A2/O technology, it needs fewer structures and equipments thus lead to lower accident rate, upkeep and maintenance costs, stronger buffer capability sustaining the shockload of water mass and quantity as well as the better denitrification result; although it needs more power and land than the A2/O, it has obvious advantages in operational management and total investment due to its simpler operational management, therefore, it is recommended in FSR that the technology of Obel Oxidation Ditch shall be adapted. The WTP of Beijing Yanshan Petroleum Co., Ltd at Niukouyu valley adopts the technology of Obel Oxidation Ditch and is operated in stable and normal manner with remarkable result of wastewater treatment, according to the relevant survey, the elimination 13 rate of the major pollutants in the disposed sewage discharged by the WTP reaches above 90%, among which, the concentration of COD is 28mg/L, BOD5 of 3 mg/L and NH3-N 1.2 mg/L. It can be concluded from the results in table 2-4 that if the urban wastewater of Mengjin County Seat reaches the standard of the quality of discharged water, the elimination rate of pollutants shall be as follows: BOD5>90.9%, COD>85%, SS> 92%, NH3-N>77.1%, TP>70% and total faecal coliform 89.6%. In order to ensure the dischar2ed IP to reach the standard, the technology is also needed to equipped with the facilities of dephosphorization with chemicals to add dephosphorization chemicals (such as FeCl3, PAC or Ca(OI)2, which can be selected accordin2 to the actual condition) at the outlet of the aerators so as to improve the elimination rate of P. In reference with the actual disposal efficiency of the WTP of same kind, it can reach the conclusion that the technology of Obel Oxidation Ditch adopted in the WTP can ensure the quality of the discharged water to meet the requirement of the drainage standard, and most of WTP in our province adopt this technology, therefore, it is recommended in the environmental protection evaluation to adopt the technical process of Obel oxidation ditch. 2.5 Technical Process 2.5.1 Wastewater Treatment Process In accordance with the wastewater amount, water quality; and treatment requirement, etc. the WTP in down of Mengjin county will adopt the technology of Obel Oxidation Ditch. The technical process of the WTP is as follows: the wastewater will be separated from the relatively large suspending particles through the coarse and fine screen, and further remove the sediment in the sedimentation tank, and then reduces and decompounds the organism, N and P in the anaerobic tank, oxidation tank, running out of through the internal channel into the secondary sedimentation tank for deposition, and finally discharged after adding c12 for sterilization. Part of the sludge returns to the anaerobic tank and the remaining sludge is transported outside after concentration and dehydration. See the following flow for the technical process and production link 14 Malodour Noise Noise Malodour and noise chlorinator room Coarse Inlet wate Fine Votex grid Anaerobic Secondary Contactin Coase InetwaerOxidation -_ screen pumping screen removal tank Oitio sedimentat pool room station room chamber ion tank Malodour and noise Returned sludge Sug Screening residue and pumpi sediment ng Residual sludge station Malodour and noise hcDehydration prOut-bounded sludge -block Technical process and sewage production links 2.5.2 Sludge Treatment Technical Process The residual sludge of the Project bears lower organism load and it is comparative old in its aging time, and stable in its nature. According to the actual operational experiences of the WTP with second stage bio-chemical technology, the sludge can be treated through concentration and dehydration instead of digestion for stability because the results are similar to each other, and this technology is applied widely because it is economical and reasonable. The technical process of the sludge concentration and dehydration in the FSR is as follows: the residual sludge is mixed with the polyacrylamide solution of 5% and transported into the concentration section for concentrating by gravitation, then it is conveyed into the compressing and filtering section by the upender and made into the sludge block with water concentration of 80% through gravitation dehydration, pre-pressing and dehydration through squeezing, the sludge block is sent by the conveyer into the outdoor sludge stockpile where it will be further dried by air for dehydration and then transported timely to the refuse landfill ground for burying. 2.6 Process Design 2.6.1 Coarse Screen room and Inlet Water Lifting Pump Station The coarse screen room and the inlet water lifting pump station will be constructed together. (1) Coarse screen room Function: intercepting the miscellanies with diameter of more than 20 mm in the inbound wastewater to protect the pump. Two sets of spotter with coarse screen with gap length of 20 mm and Inclination of 750, the water before the screen is 0.8 m deep, with the flow rate of 0.5-- 1.0m 1.0 m /s while passing the screens. The spotter has such parameters as N= 1.1 kw/set. One set of spiral presser for screening residue and residue box each will be equipped with the parameters as follows: D=cF260 mm, L=4.0 m, Q=1.3-3 m3/h, N=3.0 kw/set the coarse screen and the spiral presser will be interlocked and can be controlled 12 automatically in order by PLC or operated on the spot. (2) Inlet Water Liffing Pump Station Function: elevate the collected wastewater in WTP into the structures of water treatment. The collection tank adopt the round tank of 'k 1 Om constructed underground with brick-concrete structure, its volume shall not less than the five-minute output amount of the pump of maximum power. Inside equipped with 3 sets of automatic coupling submersible sludge pump and support fittings with factors as follows: Q=700m/h, H=1lm, N=37KW, two of the pump will be put into service while the other one is for reservation. One of the pumps in service will be controlled through frequency conversion. The pump station will be constructed over the collecting tank in brick-concrete structure with the ground parts serving the control room. 2.6.2 Fine Screen Function: Intercepting the floating and suspending miscellanies with relatively large diameter to protect the sequent water treatment equipments. Two sets of circular rake spotter will be equipped inside of the room, the gap length of the screen shall be less than 5 mm, and the designed depth of water before the screen is 0.8m, and the flowing speed is 0.79m when passing the screen, its power is 1.1KW/set. One of the spotter is manually operated and the other one is automatic, one set of spiral presser and residue box each will be equipped with parameters as D= 4 260 mm, L=6.0m, Q=1.3-3m 3/h, P=3.OKW/set, the fine screens shall be interlocked together with the presser, which can be controlled automatically in order by PLC or operated on the spot. 2.6.3 Sedimentation tank Function: Eliminate the inorganic sand particle of more than 2.65 in specific gravity and 0.2 mm in granule size to protect the sequent wastewater treatment 13 equipments, prevent the block in pipe and reduce the sand particle in sludge. Two sets of votex grid removal chambers of ( 3050 X 3350 in enforcement concrete structure will be adopted. Inside of room equipped the following equipments: two sets of gas-distribution type lifting grit draggers with power of 1.1KW/set each, two sand-water separators and residue boxes with power of 0.37KW/set each, mixing fittings of two with power of 0.37KW/set each, two sets of air-lift blowers with parameters as: Q=2m 3/min, N=3.7 KW/set. The signals for the operation of blower can also control the open and close of the T-valves and sand-water separator, which can be controlled automatically by PLC or manually. 2.6.4 Anaerobic tank Function: the phosphorus may be realised by the microorganism under the anaerobic condition to intake the phosphorus in the aerobic condition so as to achieve the aim of dephosphorization. The surplus space on central land at the Obel oxidation ditch will be used as the anaerobic tank with working volume of 600m , the average time .during which the water staying is 1.44h, the tank will be equipped with two submersible sludge pumps of N= 3.0 kw/set. 2.6.5 Obel Oxidation Ditch Function: reducing and decompounding the organism, dephosphorizing and denitrifying through the different inlet waterloads, oxygen supplies and dissolved oxygen concentrations. Two Oxidation ditches of oval reinforcement structure with designed flowing capacity of 20,000m 3/d, each of the ditches comprises of three channels with the factors as: working volume of 5,620 in ' effective depth of water of 4.2m, sludge aging time of 12d, sludge load of 0.095kgBOD5/kgMLSS * d, mixing concentration of 4g/L, 14 net output capacity of sludge of 0.876kgMLSS/kgBOD5, ratio of the returning sludge accounting for 100% in total and the stay time of waterpower of 13.49h. Each of the external, middle and internal channel will be equipped with four butterfly-type rotational aerators. 2.6.6 Secondary Sedimentation Tank Function: separate the solid materials from the liquid and support the oxidation ditch to remove the organism and phosphorus. Establish two sedimentation tanks in the radioactive flowing manners whose intakes water while the boundaries discharge water. the relevant parameters are as follows: Diameter of 30 m, valid depth of 3.2 m, stay-time of waterpower of 3.62 h, surface loading of 0 0.884m 3/ m2 * h. Two circumference-transmission siphoning panto-bridge pump dredgers with power of 0.75 kw/set, and two vacuum pumps with power of 2.2KW/set will be equipped. 2.6.7 sludge pumping tank Function: recycles the active sludge deposited at the secondary sedimentation tank to the anaerobic tank and elevate the residual sludge in the secondary sedimentation tank to the sludge treatment system. Three returned sludge pumps (with automatic coupling fittings) with parameters as: Q=420 m3/h, H=6.0 m, N= 15 kw/set, two of which are for service and the another one for reservation; two residual sludge pumps with parameters as: Q= 25 m3/h, H= 10 m, N= 1.5 kw/set, one for service and another one for reservation. 2.6.8 Chlorinator Room and Contact Tank One room of chlorinator with capacity of 5-10 mg/L will be designed to construct, which takes the liquidized chlorine as disinfector and two fully vacuum chlorinators with Q=15 kg/h will be equipped inside, one for service and one for reservation. Other 15 repairing tools such as alarming instrument for chlorine leakage, gas mask and absorbing apparatus for leaked chlorine will be repaired. One contact tank of reinforcement concrete with valid volume of 625m3 is designed. The sterilization time will be 30 minutes. 2.6.9 Sludge Concentration and Dehydration Room Function: concentrate and dehydrate the sludge to the prescribed concentration for further treatment. Inside the room equipped with the sludge pump, draper-type integrated machines of sludge concentration (two sets, one for service and one for reservation, each of the machine has the capacity of 20-40m 3/h and N=3.5KW/set), sludge spiral pump, flocculant-prepairing device, flocculant-measuing pump, washing pump equipped inside the sludge concentration machine, etc. 2.6.10 Major Equipments See Table 2-6 for the major Equipments Table 2-6 Table of Major Processing Equipment Installed capacity (kW) Remarks Uni Quantit Rooms No. Name and Specification In For t y operation reservation 1 Rotational screen 8 =20mm set 2 1.1 1.1 imported Coarse 2 Spiral presser for screening residue set 1 3 imported screen room 4 260 L=4m 3 Residue box set 1 domestic 1 Circular rake spotter 8 <,5mm set 2 1.1 1.1 imported Fine screen 2 Spiral conveyer 4 260 L=6m set 1 3 imported room 3 Residue box set I domestic 16 I Submersible sludge pump set Inlet water 3 37X2 37 imported Q=700m3/h, H=llm pumping 2 Manually operated one-beam crane set station 1 domestic P=1.5t 1 Mixer set 2 0.37 X 2 imported Votex grit 2 Air-lift blower set 2 1.1 X 2 imported removal 3 Sand-water separator and residue set 2 0.37 X 2 imported chamber box 4 Air-lift blower Q=2m3/min set 2 3.7 X 2 domestic Anaerobic 1 Butterfly-type rotational aerator set 8 imported tank and L=5m 296 Obel 2 Butterfly-type rotational aerator set ( ) 8 imported oxidation L=4m+4m ditch 3 Controllable outlet door L=3m set 2 0.37 X 2 domestic 4 Submerged mixer set 4 3 X 4 imported 1 Circumference-transmission set 2 0.75 X 2 imported siphoning spotter D 30m Secondary 2 Vacuum pump set 2 2.2 X 2 imported sedimentati 3 Weir plate for outbound water 3000 t 62 domestic on tank and X 200 its outlets 4 scum board 3000 X 300 t 60 domestic 5 Monitoring device for outbound set 1 imported water alongside production line Sludge 1 Returned sludge pump Q=420m3/h, set 3 15 X 2 15 imported pumping H=6.0m tank 2 Residual sludge pump Q=25m3/h, set 2 1.5 1.5 imported H=10m 17 3 sleeve valve for mud discharging set 2 imported DN500 1 Fully vacuum chlorinator 15kg/h set 2 imported 2 Electronic measuring scale set 1 imported chlorinator 3 Alarming instrument for chlorine set room I imported leakage 4 Electric'hoister P=2t set 1 5.4 domestic 5 Ventilator set 2 0.75 X 2 domestic 1 Devices for chemicals preparing and set 2 2.45 2.45 domestic adding Chemicals 2 Measuring pump Q=175L/h , set 4 0.37 X 2 0.37 X 2 imported add room H=10Bar 3 Chemical-dissolving jar set 2 0.55 0.55 domestic 1 Integrated machine of sludge set 2 3.5 3.5 imported concentration 2 Mixer in sludge buffer tank set 1 4 imported 3 Sludge screw pump set 3 2.2 X 2 2.2 imported 4 Washing pump set 2 5.5 5.5 domestic Sludge 5 Air compressor set .2 2.2 2.2 domestic dehydration 6 Pipe-type mixer set 2 domestic room 7 Horizontal conveyer set 1 1.5 imported 8 Oblique conveyer set 1 3 imported 9 Electronic one-beam crane P=2t set 1 5.4 domestic 10 propeller fan set 3 0.75 X 3 domestic 11 Chemicals-adding apparatus for set 2 1.3 1.3 domestic dephosphorization Upkeep 1 Lathe set 1 11.2 domestic room 2 Radial drill set 1 8.0 domestic 18 3 Grinding wheel machine set 1 1.5 domestic 4 Electric welding machine set 2 35.0 domestic 5 Gas welding device set I domestic 6 Large-sized Tongs platform set 1 domestic Laboratory 1 Devices concerned set 1 30.0 domestic 1 Microbus set 1 domestic 2 Tool wagon with loading capacity set 1 domestic Vehicle of 2t room 3 Ordinary loading vehicle set 1 domestic 4 Self-unloading vehicle set 2 domestic 5 Garbage-transporting vehicle set 1 domestic Major process equipments in total: Set 113 567.51 72.84 2.7 Pipe Network Engineering 2.7.1 Determination of Drainage System The major Drainage systems in cities are the combining system of rainwater and sewage and the rainwater-sewage separating system; the drainage pipe adopted with the rainwater-sewage separating system can effectively reduce the deposal capacity of the sewage entering into WTP, decrease the construction scale and investment of the wastewater treatment project, and thus there would no environmental pollution by sewage in rainy season or shockload of water quantity to the WTP, which is beneficial to the operation and management of WTP, the existing drainage system in Mengjin county is the combining system for sewage drainage, which will be give the way the rainwater-sewage separating system according to the overall planning and the present situation of Mengjin county. 2.7.2 Principle of Pipe Network Arrangement The principle of pipe network arrangement is as follows: 19 In accordance with the overall planning for the county, the drainage system will be the rainwater-sewage separating system. 11 The sewage pipe network will be planned and arranged in uniform manner while constructed step by step according to the designed water quantity, and it shall be in conformity with the WTP Z The sewage amount in different regions shall be calculated in terms of the collection area. E-The plain position and elevation of the sewage pipes shall be determined in accordance with the factors such as the landform and physiognomy, road construction, soil quality, groundwater level, construction condition and the existing drainage pipes in the county etc. I it is necessary to adopt the advanced and reasonable construction technology to relieve the difficulties in construction and lead the sewage to self-flowing by its gravity when satisfying the collection requirement. minimize the dismantling work so as to decrease the impact to the normal production and work of the enterprises and institutions and residential living under the condition that the pipes are pavement on smooth, reasonable and economical basis. I emphasis shall be put on the social results, environmental benefit and economic returns during the arrangement for pipes. 2.7.3 Arrangement for Sewage Pipe Network In accordance with the horizontal arrangement in the planned regions and the situations of existing pipe network, the planned pipe network arrangement will be divided into two regions, Region 1# covers the area north to Lingnan road (the constructed region) and the area encompassed by Lingnan road, west Baihe road, and Xixia road with controllable area of 8.14 kin2, pavement for pipes in this region will begin in the first stage; while other parts of area belongs to the Region 2#, which 20 covers land of 2.36 km 2, and dominated by the drainage-pipe-free villages and field, it is designed as the planning region in the future so that pavement of pipe in this region will begin in the second stage, and no consideration is taken in this Evaluation. See the attached drawing 3 for the picture of the construction in near future and the region division. As the physiognomy of Mengjin County seat downwards from north to south, and from east to west, the main pipe is designed to enter into the WTP alongside Anju road, west ring road. While the branch pipes will be connected into the Main one alongside Guihua road, Shangyejie (commercial street), Pingle road, Huimeng road, Nanyuan road, Lingnan road and Xixia road. See the attached drawing 4 for sewage pipe arrangement. Material Selection: sewage pipes whose DN falls within the range of 300--400 will adopt the UPVC double-wall corrugated pipe; those of DN500 will adopt the PE double-wall corrugated pipe and those of DN 600 will be the pipe of reinforcement concrete. The newly-increased sewage pipes in this Project is 25,285m long, see table 2-7 for the workload of the sewage pipe network. Table 2-7 Work Load of Sewage Pipe Network No. Name Specification Unit Quantity 1 UPVC double-wall corrugated pipe DN300 m 10888 2 UPVC double-wall corrugated pipe DN400 m 7025 3 PE double-wall corrugated pipe DN500 m 683 4 Pipe of reinforcement concrete DN600 m 4679 5 Pipe of reinforcement concrete DN700 m 940 6 Pipe of reinforcement concrete DN800 m 475 7 Pipe of reinforcement concrete DN1000 m 595 Total pipes m 25285 21 2.8 Analysis for Factors of Environmental Influence The construction for the WTP is to harness the pollution problems in the regional water environment, however, the WTP itself will produce the secondary pollutants that are dominated by malodour, sewage, noise and solid waste during its operation. 2.8.1 Malodour The malodour produced in the wastewater treatment comprises of NH3, H2S, methyl mercaptan, dimethyl sulfide, trimethylamine etc., but giving priority to NH3 and H2S, whose capacities are subject to the technical process selected, as well as to the variations of water quality of the sewage, air temperature and water temperature and aerating amount, that is, the capacities of NH3 and H2S produced in summer and autumn are higher than those in winter and spring, those produced in the section with aerating action are higher than those in calm section with natural emanation. The main emitting spots of the malodour are at screen rooms, oxidation ditch, sludge storing pool, structures of sludge-disposing (rooms for sludge concentration and dehydration as well as sludge shed) etc. the emission method is free emission and in accordance with the domestic WTP with the same technology (with disposal capacity of 20,000 m'/d), its source intensity is determined as follows: NH3: 0.7 kg/h, H2S: 0.003 kg/h. 2.8.2 Sewage The sewage discharged from the WTP are mainly the treated tail water at the drainage capacity of 20,000 m3/d. the water quality can reach the Category IB of the Drainage Standard of Pollutant from Urban Wastewater Treatment Plant (GB18918 - 2002). In addition, during its operation, the WTP itself will produced a little domestic and production sewage, all of which are led into the sewage water pumping station in Site for treatment after elevated into the wastewater treatment system, and no direction discharging of them are allowable. 22 IM 2.8.3 Noise The major high-noised equipments in WTP are air-lifted blower, submersible sludge pump, returned sludge pump, residual sludge pump, air compressor, butterfly-type rotational aerator and integrated device for sludge concentration, the value of the Noise is within the range of 75-85 dB (A) 2.8.4 Solid Waste The solid waste produced by the WTP during operation can be classified as screening residue, sediment, and residual sludge, their data are as follows: the screening residue is of output capacity of 1 t/d and 20% water concentration, sediment of 1 t/d and 20% in output capacity and water concentration respectively while the residual sludge of 14 t/d and 80% respectively. 3 Analysis of Environmental Influence 3.1 Analysis of Impact to Environmental Atmosphere 3.1.1 Analysis of Impact of Malodour The emission method of the inalodour produced by WTP is free emission, up to now there is no economical and workable method to control its source intensity, and its impact can only be prevented and treated in such sectors as technical process designing, horizontal arrangement in Site, operational management and virescene sectors, etc. O The structures that may produce the malodour shall be centralized and kept away from the residential community in the horizontal arrangement in Site, The wastewater treatment technology adopts the Obel oxidation ditch, during which the aerobic bio-treatment will be conducted in the internal ditch, therefore, it is a process to eliminate the malodour in sewage. 7- The facilities for sludge treatment will be built indoors to reduce the emission of malodour to the atmosphere by the sludge, and the storage amount and time of the . sludge in Site shall be minimized. 23 I Stress shall be put on virescene to absorb the malodour. Such trees as abele, acacia, paulownia, mulberry, elm, juniper, contorted hankow willow, pentangular maple, chinar, Cathay poplar and Canada poplar,etc. that has the strong function of H2S-absorbing and NI3-absorbing will be plated at the boundaries around the Site, so that the emission of malodour to the atmosphere can be reduced. E Make big efforts to the environmental sanitation in Site by doing a good job in elimination of mosquito and fly. The intensity of pollution source will be determined in accordance with the Project analysis, the contributing value of the malodour to the impact on the residential spots nearby in the adverse wind direction, with different degree of stability and under the condition of annual wind speed and calm wind after the completion of the WTP will be calculated according to the pattern of source area. See the results in table 3-1. Table 3-1 Contributing Value of the Malodour to the Impact on Residential Spots Nearby mg/Nm3 Items Wind velocity B D E 3.81m/s 0.0080 0.0261 0.0552 NH3 Calm wind 0.0008 0.0037 0.0062 3.81m/s 0 0.0001 0.0002 H2S Calm wind 0 0 0 It can be seen from the table 3-1 that NH3 and H2S is at the Grade E stability, whose contributing value to the residential spots nearby reach the maximum ones of 0.0552 mg/Nm3 and 0.0002 mg/Nm3 under the condition of wind velocity of 3.8 1m/s, accounting for 27.6% and 2.0% of the standardized ones respectively, therefore, the quality of the environmental atmosphere around the residential nearby still satisfy the requirement of Standard after the completion of the WTP. By calculation, the maximum concentrations of such malodours as NH3 and H2S 24 at the boundaries of the site under the condition of the average annual wind velocity and calm wind are 0.1625 mg/Nm3 and 0.0007 mg/Nm 3, both of them lower than the Category II of the Drainage Standard of Pollutant from Urban Wastewater Treatment Plant (GB18918 -2002), refers to the Form 4 In view of the reaction of olfaction to odour, the malodour may be classified into different strength classes. In China, there exists no such kind of classification standard; this evaluation should refer to the malodour strength class and malodour permissible criteria as stipulated by the Japan environmental hazard department, for details please see to Table 3-2, 3-3. Table 3-2 Expressions for 6 Classes Malodors Strength Strength Strength Reaction class 0 Odorless No odor Just sensing of malodors, but failing to tell from 1 Test what kind of odor it is. 2 Recognize Just telling from what kind of odor it is. 3 Obvious It is prone for sense. 4 Strong malodors Feeling unhappy when smelling it Intensive 5 Powerful malodors malodors Table 3-3 Relationships between Malodors strength and Malodors Concentration Strength 1 2 2.5 3 3.5 4 5 NH3(ppm) 0.1 0.5 1.0 2.0 5.0 10 40 H2S(ppb) 0.5 6 20 60 200 700 800 The maximum concentration value of NH3 outside the plant boundary is 25 0.21ppm(0.1625mg/Nm3), while that of H2Sis 0.46ppb(O.0007mg/Nm3), by contrast to Table 3-2 and Table 3-3, it tells that the malodors strength ranges from Class 1 to Class 2. 3.12 Sanitary Prevention Distance 3.12 Sanitary Prevention Distance In accordance with the preventions of the Technical Method on Formulating Emission Standard of Local Atmosphere Pollutants (GB/T13201 -91), between production unit where the free emission source locates and the residential communities shall be established the sanitary prevention distance, whose formulation is as follows: = -(BL + 0.25r 2 )0.50 LD Cm A Among which: Cm -Standard limited value (mg/Nm3); L- Sanitary prevention distance required by industrial enterprise (m); Q,-Controllable level that may be reached by the capacity of freely emitted malodour (kg/h); r-Equivalent radius of the production unit where the free emission source of malodour locates (m). The sanitary prevention distance of this Project can be calculated as 94 m according to the capacity of the free emission of NH3 and H2S, as the gradation of the sanitary prevention distance within 100m is 50 m, therefore, the sanitary prevention distance of this Project will be determined as 100 m, however, there is no centralized residential community within the sanitary prevention distance after the removal of the residents of the thirteen group of Niubuhe village. 3.2 Analysis to impact of water environment 3.2.1 Analysis to impact of surface water environment After the urban sewage is treated, the outlet water complies with the secondary 26 standard as stated in Standard for Water Quality for Farmland Irrigation GB5083-92, so it could, in consideration of such region being short of water, be used for farmland irrigation and will not cause a bigger impact to the groundwater environment of regional soil. However, the farmland irrigation is limited by seasons and its water consumption is finite, so the sewage shall, in addition to irrigation purpose, be recycled to some extent, part of them after being deeply treated (e.g., adding flocculating sedimentation, filtration process) could be used for afforestation, sprinkling the road or for municipal water consumption etc., with a view to reducing the drain of sewage into Chanhe River as far as possible. After the urban wastewater treatment plant is put into use, the pollutant discharge amount could be reduced by a ratio of 75-92%, the reductions for pollutant discharge amount see to Table 3-4. Table .3-4 Reductions for Pollutant Discharge Amount after the Operation of Wastewater Treatment Plant Project BOD5 COD SS NH3-N TP Prior to 1606 2920 1825 255.5 29.2 treatment t/a After 146 438 . 146 58.4 7.3 treatment t/a Reduction 1460 2482 1679 197.1 21.9 quantity t/a Reduction 90.9 85 92 77.1 75 ratio % As viewed from Table 3-4, the BOD5 is reduced by 1460t/a, COD reduced by 27 2482 t/a, SS reduced by 1679t/a, NH3-N reduced by 197. It/a, TP reduced by 18.25t/a.. In the impact analysis to surface water environment, only the maximum degree impact which the tail water of wastewater treatment plant did on the Chanhe River when bein2 fully discharged into the Chanhe River is taken into consideration. The prediction to Chanhe River's water quality is subject to S-P Model, the formula is presented as follows: x c = co exp(- KI 86400uj In reference to the monitoring data concerning the status quo of cross section 1#, 2# of Chanhe River, we could, by the aid of above model, conclude the oxygen consumption Coefficient of CODcr, BOD5 between cross section 1#, 2# is 2.51d- , 2.58 d1 respectively. The concentration for CODcr. BOD5 at cross section 1#, after the operation of wastewater treatment plant, shall be calculated as per the outlet water quality of wastewater treatment plant, so the concentration for CODcr, BOD5 at cross section 2#, as per above model, is predicted to be 7.11mg/L, 2.51mg/L respectively, reduced by 82.88% , 86.11% in comparison with the existing. So the water quality at cross section 2# (control cross section of Chanhe River) -is improved considerably, complyin2 with the Category III as stated in GB3838-2002 Standard for Environmental Quality for Surface Water. The application of tail water which could be used for farmland irrigation, 28 afforestation, sprinkling roads as well as municipal demant could not only reduce the amount of sewage drained into Chanhe River but also reduce its impact to Chanhe River. The environmental benefit for this project is remarkable. 3.2.2 Analysis to impact of groundwater environment Presently in Mengjin County seat, there are three water source lands, that is, the Lijiao Water source (involving 2wells, well space of 850m, with daily capacity of 3000m3/d), the urban water source (involving 2 wells, well space of 1500m, with daily capacity of 2000m3/d), and the water source, south to Sihe River (involving 5 wells, well space of 500m, with daily capacity of 6000m3/d); the water source well nearest to the purposed wastewater treatment plant refers to the 4# well south to Sihe River, with well depth 150m, linear distance 1.8 km. According to the data provided by Mengjin Water Undertakings, the Chanhe River which is the pollutant-receiving water body for this project may replenish to the groundwater. In light of the data provided by the Water Conservancy of Mengjin County (See to Appendix), a 1.5 km2 water cone has come into being nearby the water source land presently, 2.8 km away from the plant site of the proposed wastewater treatment plant which so remain out of the range of that water cone. In view of the reasons that the proposed wastewater treatment plant is located at the lower reach of groundwater source land of Mengjin County and those aforesaid causes, the discharge of tail water from wastewater treatment plant will not cause any pollution to the groundwater source land. 3.3 Analysis to impact of acoustic environment 29 The principal high-noise equipments for wastewater treatment plant involve the air-lift-purpose blower, submersible sewage pump, air compressor, returned sludge pump, excess sludge pump, aerator and sludge thickening integration Equipment, please see to Table 3-5 for details of noise source strength and control measures Table 3-5 Noise Source Strength and Control Measures Source Effect for Equipment strength Quantity Control measure Remark control dB(A) Sound elimination. Air-lift-purpose blower 85 2 sets Two for use sound insulation Two for Submersible sewage pump 75 3 sets / use, one for later use One for Sound elimination, Air compressor 85 2 sets use, one for sound insulation The noise later use may be Two for Shock absorption, reduced by Returned sludge pump 80 3 sets sound insulation 20 dB(A) or use, one for later use so One for shock absorption, excess sludge pump 80 2 sets use, one for sound insulation later use aerator 75 16 sets / 16 for use One for sludge thickening shock absorption, 80 2sets use, one for integration equipment sound insulation later use As viewed from Table 3-5, the source strength for high-noise equipment ranges from 75 to 85 dB(A), the model selection of equipment may prefer to a low noise 30 equipment, and the noise may, after the application of measures like noise elimination, shock absorption, sound insulation, be reduced by 20 dB (A) or so. In light of the concrete position of strong noise equipment and noise source strength, by the aid of formula concerning the noise being reduced with space, and in consideration of afforestation denoising function, the sound level value at boundary for wastewater treatment plant could be predicted and presented in Table 3-6. Table 3-6 Prediction Results for Noise at Plant Boundary Whether or not Plant affected value Evaluation standard meeting the standard boundary Daytime Nighttime Daytime Nighttime Daytime Nighttime Meeting Meeting boundary 39.2 39.2 the the standards standards Meeting Meeting Wes y 44.4 44.4 the the boundary standards standards North Meeting Meeting Nourt 31.4 31.4 the the boundary standards standards Meeting Meeting boundary 44.0 44.0 the the standards standards As viewed form Table 3-6, the prediction value for noise at plant boundaries will, after the completion of wastewater treatment plant, range from 31.4 to 44.4dB(A), and, no mater at daytime or nighttime, comply with the Category I standard of Standard for Noise at Plant Boundary of Industrial Enterprise. The noise do a slight impact to outer environment due to there being no residential area within the 200m range of 31 wastewater treatment plant. 3.4 Analysis to impact to solid waste During the normal operation of wastewater treatment plant, the solid waste will be produced in screen room, sedimentation tank and sludge dewatering room, involving principally the screen residue stopped by screen, the grit produced in sedimentation and the excess sludge produced in biochemical wastewater treatment etc., their productions see to Table 3-7. Table 3-7 Productions of Solid Waste Category Source Quantity (t/d) Remark Course screen, fine Domestic impurity, water Screen residue 1 screen contents of 20% Grit Sedimentation 1 Insoluble argillaceous silt, water contents of 60% Sludge dewatering Dewatered sludge, water Excess sludge 14 room contents of 80% The screen residue produced at screen room refers to those big impurities like the plastic, waste paper, clout and domestic refuse etc. The insoluble grit gives priority to mineral, without any heavy mental or toxic or harmful substance, belonging to common solid waste, so could be removed to refuse landfill ground after being fished for and cleaned out. The excess sludge may, after being dewatered, be transported the Luoyang No.1 Refuse Landfill Plant which is located at Caoyang Town of Mengjin County, out of the 32 Plan Area of Mengjin County Seat. The transportation line is: WTP---Jingao Highway Branch---Luomeng Road---Luoyang No.1 Refuse Landfill Plant, the transportation distance is 12 Km or so. This disposal plant is to treat domestic refuse by means of standard sanitary landfill, with disposal capacity of 1200 t/d. The Receipt Certificate for Luoyang Refuse Ground Administration Office sees to Appendix. The excess sludge shall, when being treated with landfill, be dried as far as possible to some extent and could not transported for landfill till its watei contents meet the requirements for refuse landfill. The anti-leakage and loss-prevention measures shall be applied to the transportation of dewatered sludge, and, any discarding or shedding cases during transportation are forbidden. The integrated use of sludge shows the trend of sludge treatment because the realization of integrated use of sludge not only abates the pressure on the city refuse landfill ground but also solves the problems concerning sludge treatment of wastewater treatment plant. For this reason, this evaluation has made a analysis to the integrated use of sludge and offered the wastewater treatment plant the proposals for feasibility of integrated use. The integrated use of sludge which is a kind of sludge disposal type arisen over recent years could be found many practical cases both at home and foreign. Integrated use of sludge are mainly concerned with two types, one is compost use and another is digested sludge direct use. The purpose of sludge compost is to modify the sludge into 33 a kind of nature-stable humus in virtue of a decomposition that the microorganism in sludge did on the organic constituent in sludge, and to eliminate the malodorous gas in sludge, kill the pathogen, degrade to some extent the toxic organic substances. The digested sludge direct use is used to regard the sludge which have been treated with condensation, anaerobic digestion and dewatering measures as a kind of agricultural fertilizer. Other seeking and attempts are still under study, for instance, the dewatered sludge can, after being dried and added with an amount of nutrient substance which is needed by crop, be made into a compound fertilizer used for farmland or improved soil, such approach has been adopted by many wastewater treatment plants distributed in Qinhuangdao, Dalian, Tangsha, Baoding, Hangzhou etc and sees a good effect. After being further dried, the sludge can be treated with incineration, if further drying treatment, it can be used for the filler for road building material or building material etc. In light of Policies for City Wastewater Treatment and Pollution Control Technology (Jiancheng [2000] No.124), "The sludge which is produced by the wastewater treatment device whose capacity is less than 100000 m3/d may be subject to the composting treatment and multipurpose use", the excess sludge produced in Mengjin County Wastewater Treatment Plant may be subject to the composting treatment and multipurpose use, in addition to landfill purpose. This wastewater treatment plant, matched with a temporary sludge store ground which can store an amount of sludge produced for ten days, is located at the most west of plant area, covering an area of 96 in2. Therefore, the dewatered sludge cannot stay 34 over 10 days at that ground, and, necessary pollution control measures must be required in light of the regulations of Law of Pollution Control of Solid Waste. O The temporary store groundshall be hardened, mounted with platfond and fence to prevent from diffusing, loss and seepage. O The limited height for sludge piling-up (maximum 1.5m) shall take into consideration the ventilation condition, management shall be enhanced to prevent from steming of mosquito and fly. O The sludge had better not stay at ground for a long time and shall be removed away for disposal or other purposes. E A drain device which is mounted at sludge store ground shall discharge the sewage to wastewater treatment plant for disposal. 4 Analysis to risk accident 4.1 Analysis to pollution due to power cut risk accident The power cut may cause the fact that the sewage is drained to surface water body without any treatment, and thus give rise to environmental pollution. But the wastewater treatment plant may adopt two-circuit dual power supply to solve it. The work power supply is from the Chengguan Transformer Station, by a special line. The spare power supply connects to the city supply main nearby. The said two power supply come from different transformer, and trolly wire is applied to lay down to plant side where it is transited as a cable which is led into the 10kv switch cabinet of plant. The power supply is subject to 10 KV, while low-voltage distribution voltage to 0.4 KV. Therefore, the possibility of occurrence of power cut risk accident is very small. 4.2 Analysis to pollution under circumstances of failure with equipments or 35 Overhaul with project At project planning, a spare one for various equipments and instruments is required. The possibility that the sewage is discharged directly without any treatment due to failure with equipments is small, so only pollutions under a circumstance of overhaul with project could be taken into consideration. At overhaul with project, the wastewater treatment ability will be cut down by half in common, about 50% wastewater will be discharged to surface water body directly without treatment, which may bring some short-time pollution to surface water body. 4.3 Analysis to risk accident of chlorine leakage As viewed from process flow, a chlorinator room mounted in wastewater treatment plant is to do a disinfections treatment to wastewater. The chlorine, as a virulent gas, is a potential pollution and potential safety hazard, so when occurrence of leakage, it may cause a severe environmental pollution and thus endanger the human's life. For this reason, the following control measures must be applied: ( The chlorinator room and the chlorine store shall be separated from each other, a automatic alarming device for chlorine leakage and a self-bleeding System shall be mounted in the store. Z A vacuum chlorinator of high safety degree shall be chosen, when damage with pipeline, it can automatically close up the chloridization System to prevent from any leakage of chlorine. ( The operator shall be outfitted with gas mask, armed with safety education; a emergency reserved plan shall be established to avoid the occurrence of accidents; 36 An accident tank shall be set up, once occurrence of leakage, the chlorine cylinder must be immediately thrown into the accident tank; ( When occurrence of chlorine leakage, it shall be reported to the Governmental entities like the environmental protection entity to adopt a countermeasure. 5 Analysis to rationality of plant site selection 5.1 Site selection The feasibility study report has offered two programs for the site of wastewater treatment plant: Program I: the site is located at the southwest to county set, running eastward to West Huancheng Road in plan, westward to Dongxigou, southward to 120m to Ash-store Ground of Yonglong Electric Powe-Company, northward to Group 13 of Niubuhe Village. Program II: the site is planed in the Overall Plan, it is located southwest to county seat, south side to the cross between purposed West Huancheng Road and Huangchengnan Road, -running eastward to 300m to Jingao Highway Branch, northward to 120 m to South Huancheng Road, that is, around 60 m to the north side to the Group 7 of Niubuhe Village. 5.2 Contrast to plant site Technologically, the said two programs both satisfy the requirements on site selection of wastewater treatment plant, both of them have a good power supply condition and drain condition. On the basis of principle of economic feasibility, technological feasibility, we now have a comparison to these two programs with regard to engineering technology and investment cost, for details see to Table 5-1. Table 5-1 Contrast Table for Principal Technological and Economic Parameter 37 on Programs of Plant Site Item Site I Site II The sewage pipeline is shorter that that in Waste pipeline Prga 1 oteivsmn sls.increases the investment for this project. Wast pipline Program II, so the investment is less. Sewage from area I may fully drain into the Sewage from area I may fully drain into wastewater treatment plant by itself, while the wastewater treatment plant by itself, water-receiving that from area II needs to be lifted into the while that from area II needs to be lifted condition wastewater treatment plant. into the wastewater treatment plant. Plant site is close to the purposed West Plant site is far away from the South Huancheng Road, the new-built entry road Huancheng Road and the Jingao Traffic condition into plant is shorter, the traffic condition is Highway Branch , the new-built entry good, which may save the investment for road into plant is longer, which may project. increase the investment for project. Plant site is 1 lkm away from Chanhe Plant site is 0.04 km away from Dongzigou, so the drain condition is convenient. River, so the drain line is a little far. Power supply It is nearer to the transformer substation, the It is nearer to the transformer condition power supply is ensured. substation, the power supply is ensured. It is close to water supply range of municipal It is a litter farther to the municipal Water supply water supply pipe network, it is not necessary water supply pipe network than condition to newly lay pipeline or build self-service well.Program I. well. It is located at the lower reach of county seat, It is located at the lower reach of county Surrounding the frequent wind is leeward direction, and seat, the frequent wind is leeward environment there are no inhabitants nearby the leeward direction, and there are inhabitants direction. around 60 m to the leeward direction. A few inhabitants (around 40 families) Removal workload 23 families need to be removed. need to be removed due to locating in the sanitary-control range. Flood control There is no requirement of flood There is no requirement of flood control. condition control. The site is out-of-flatness, many slopes, The site is widen, smooth , and the Site grading and the earthwork to be excavated or earthwork to be excavated or filled is little. filled is large. Gross project lower higher investment As viewed from above table, the site I is not that established in the Overall Plan, 38 however, the waste pipeline required in site I is shorter than that of the established site in the Overall Plan, in addition, the earthwork to be excavated or filled is little, the traffic condition as well as water supply and power supply and drain condition all are good, the removal workload is less than that of site II due to no residents being found at the leeward direction of plant side, and the gross project investment is lower. For this reason, the Site I is recommended as the wastewater treatment plant for this project. 5.3 Rationality analysis The rationality analysis to the selected plant site is presented as follows: 0 The land of acquisition belongs to ordinary farmland (see to Appendix), the long-term development-purposed land is reserved at south to plant site. O The purposed WTP lies at the east to Dongzigou Ditch, its west plant boundary is 40 m away from and 10-odd higher than Dongzigou Ditch, therefore, the project, after completion, will not cause a flood or debris flow. E It is located at the lower reach of county seat, in the near future, the domestic sewage and industrial wastewater which are in the service scope of wastewater treatment plant may enter by themselves into the plant, no lift pump station is needed. D It is located at the leeward direction of the dominant wind, so doing a slight impact to the county seat, and there is no residents at the leeward direction. It is located at 1.8 km of lower reach of the nearest drinking source well, outside the water cone of water source land. 39 9 It is located at the edge of periphery of the Planning Area of county seat and in the east planning area, belonging to the Category industrial land. It is near to the main roads of county seat, and the power supply, water supply and traffic conditions are very good. 9 In light of the analysis to environmental impact, the environmental atmosphere at plant boundaries and the residential area nearby complies with the standards, in addition, the drain of tail water will not cause pollution to the water source land of groundwater. There is no noise impact nearby by residential area. O As though there are 23 families needing to be removed, the government of Menjin County has promised that the living quality of inhabitants will not be dropped down after removal, after the fulfillment of removal plan, there will be no centralized residential area in the sanitary-control range. In one word, this evaluation, if in view of environmental protection, comes to a conclusion that the site selection for the purposed wastewater treatment plant is reasonable. 6 Layout and rationality analysis 6.1 layouts In reference to the meteorological condition of Mengjin County, the topography, Geology, physiognomy of plant site, the functions of each main structures as well as the process requirements and the sewage flow direction, the overall plant is divided into two function areas, that is, the sewage and sludge treatment area and the office and auxiliary production area. The sewage and sludge treatment area is a center area, covering all the sewage and sludge treatment structures, located at the semi-south 40 section of plant site; while the office and auxiliary production area covers the integrative office building and all the auxiliary production Buildings, located at the semi-north section, and it is a control center of the whole plant. The green belt is planted around the plant site as well as the idle area, outside the south boundary is planned as the long-term development-purposed land, with total greening area of 9062.8m2, the greening factor of 40%. Please see to attached diagram 5 for the layout of plant site. 6.2 Rationality analysis As viewed from the layout of plant area, the production area is located at the semi-south section, while the office area at the semi-north section, and at the upwind of production zone because the regional most frequent wind direction is northeaster and northwester. In addition, roads and green belts are set up to separate the office area and the production area, so as to reduce the adverse impact as far as possible. Outside the south boundary is the reserved land, which can be used for reclamation of middle water and long-term development-purposed land. The production area, as per the technological flow of sewage disposal, is arranged from east to west, with water inlet at north and water outlet at west which may be drained into Dongzigou nearby, so the flow is smooth, compact, in this way, the pipeline is shortest and the economic feasibility is proved. The sludge temporary storage yard in plant is located at the westernmost side of plant area, far away from the Huangchengxi Road and settler's residential area. The transformer substation is near to pump room and oxidation ditch in order to save energy. All in all, the layout of the overall plant area is compact, the function area is definite, in this point, and the layout of plant area is evaluated to be sound. 7 Environmental management and Monitoring plan 7.1 Environmental management 41 7.1.1 Organization structuring In light of national relevant regulations concerning environmental protection., after the completion of wastewater treatment plant, it is proposed to establish the environmental management organization, allocate special management staff for environmental protection to take charge of the environmental management of overall plant, their responsibilities cover the follows: ( To put into exercise various environmental laws and regulations as established by the state, province and city. Z To organize and establish the regulations for management concerning environmental protection and monitor their fulfillment. ® To organize and establish and carry out the overall plan and program concerning environmental. 9 To Gather, tide up and popularize the advanced technology and experience concerning environmental protection, and timely remove the environmental protection problems occurring in operation. ® To lead the monitoring station of environmental protection to complete the monitoring and statement mission. 9 To do well the works concerning the gathering, tiding up and management of files with regard to monitoring data. O To do well the preparation of emergency accident treatment, participate the investigation and treatment of accident concerning environmental pollution. 7.1.2 Rules for operation and management 42 The normal operation, better or not, of wastewater treatment plant will directly affect the outlet water quality, therefore, wastewater treatment plant shall complete its Rules for operation and management, for details: 0 To establish a complete safe operation instrument and management regulation. (9 To have a technical and safety education to the operators and managerial staff, to make them master various safety operation instrument and operate strictly as per the operation instrument. ® To have a regular or irregular overhaul to production equipments in such a way that they remain in a sound condition. 9 To establish emergency reaction plan. 0 To mount determinator, alarm and ventilation system at the workshop section where the toxic or noxious gas is produced, and to outfit gas mask. 7.2 Monitoring plan of environment 7.2.1 Establishment of monitoring institute In light of relevant provisions and the practical operations, it is proposed that the full-time or part-time monitoring or analysis 2 staff for wastewater treatment plant shall own the special knowledge and techniques concerning environmental protection, chemistry and analysis so that they can do well in monitoring or assay or analysis work. Their principal tasks cover: 0 To take charge of monitoring the intaking water quality, volume and the quality of surrounding environment of plant area, and report timely when 43 finding any abnormal cases. ) To be familiar with the outlet water quality as well as the drains of pollutants, make an analysis to the change rules of pollutants, establish monitoring files and provide basis for the control of pollution and environmental management 7.2.2 Monitoring item The monitoring of various treatment process, outlet or inlet water quality, and waste gas and noise produced in production shall be done at operation stage, involving such key monitor items as the various treatment process and outlet or inlet water, they shall be covered in the daily check. the automatic discharge gauge, COD on-line monitoring device shall be mounted at the drain of wastewater treatment installation. See to Table 7-1 for monitoring plan Table 7-1 Environmental monitoring plan Position of monitoring pointMonitoring Monitoring item frequency Outlet or inlet of wastewater Water temperature, water discharge, PH, once/season COD, SS, NH3 - N, TP, BOD5, TN, treatment installation faecal coliform Outlet of wastewater treatment installation in series Water charge, COD Plant boundary twice/year noise at plant boundary 1 Om outside plant boundary once/year H2S, NH3 Wastewater treatment plant should be equipped with necessary monitoring analytical apparatus; the equipment investment is 250000 yuan while the monitoring fee is 2000 yuan/year or so. 8 Investment estimation for environmental protection 44 The wastewater treatment project belongs to a environmental protection project, it will, during its operation, produce a secondary pollution by itself. The secondary pollution controls and the investment estimation see to Table 8-1. Table 8- 1 Secondary Pollution Controls and Investment Estimation Investment No. Item (ten-thousand Construction contents yuan) Solid waste Temporary sludge storage ground, 1 treatment 50 anti-leakage for storage ground, vehicle etc. 2 Noise control 5 Sound elimination, shock absorption etc. Trees, flowers shall be planted along the 3 afforestation 27 plant area, boundary, road. Monitoring Analytical apparatus, reagent, on-line 4 25 current development at plant master outlet instrument and mark Control measures for gas mask, Accident tank, alarm instrument 5 3 leakage of of chlorine leakage etc. chlorine 6 Total 110 As viewed from above table, the investment concerning the control measures of secondary pollution for this project is 110 ten-thousand yuan, accounting 2.16% of gross investment. 9. Analysis to economic gain or loss 9.1 Analysis to environmental benefit The Mengjin County wastewater treatment project is an environmental protection 45 project with a view to protecting environment, benefiting society and state and people, its main benefits embody at the aspect of environmental profit. After the completion of this project, the pollution of city sewage to environment will be reduced greatly. as viewed from Table 3-2, after the Mengjin County Wastewater Treatment Plant is put into use, the pollutant discharge. amount will be reduced by 75-92%, the BOD5 reduced by 1460 t a, COD reduced by 2482t / a, SS reduced by 1679 t / a, NH3-N reduced by 197.1 t / a, TP reduced by 21.9 t / a, which may relieve the impact to surface water body, and play an vital role to protect the underground water resources and guarantee the body health of residents along river. In this sense, this project's environment benefit is remarkable. 9.2 Analysis to social benefits The building of Mengjin County wastewater treatment project may relieve the pollution to surface water and groundwater at urban area and improve the environment of county seat; it is not only in favor of the improvement of economic strength, social status and population thesis of Mengjin County, but also a vital condition to open up and attract foreign investment, so it belongs to a strategic problem concerning city development. 9.3 Analysis to economic benefits As the wastewater treatment project which belongs to infrastructure requires a big investment, in view of directly economic benefits, the investment benefits for its 46 construction is not remarkable. However, in a broad sense, its indirectly economic benefits concerning investment is greatly remarkable, which is embodied where the economic losses caused to society due to wastewater is greatly reduced, for details see to the follows: 0 It is capable of reducing the investment and operation fee which are required when the enterprises are scattered to treat wastewater. © It is capable of reducing the pollution to water environment, which is vital importance to guarantee the city water supply. ® It is capable of avoiding the impact to the quantity and quality of industrial products due to water deterioration, so as to improve the competition strength of products. ( It is capable of avoiding the reduction of healthy level of urban residents due to water pollution, and avoiding the medical healthy fee as well. The analysis to principal technical and economic index for wastewater treatment project see to Table 9-1. Table 9-1 Table for Analysis to Principal Technical and Economic Index No. Description Unit Index 1 Planning production 10000 m'/d 2.0 scale 2 Total investment Ten-thousand year 5101 3 Treatment cost yuan/m 0.71 4 Compensation years Year 10.86 for loan 5 investment recovery Year 15.20 4period 47 In sum, the environmental benefits, social benefits as well as economic benefits concerning the construction of Mengjin County Wastewater Treatment Plant is very remarkable. 10. Information publicity and public participation Information publicity and public participation, as a content the Environmental Evaluation Process of World Bank focuses on, is also a content which is stated and required by the relevant environment laws of our country. For this reason, this evaluation report establishes a topic concerning it. 10.1 Information publiscity In order to let the public makes knowledge of contents concerning wastewater treatment project, the Mengjin Water Undertaking give a notice on network at www. lymi. cn , in addition to the information publicity to this project issued on Luoyang Evening News (Version III, March 16, 2005, see to Appendix) and on Luoyang Broadcast and Television News (P17, periodic ,12, 2005). 10.2 Public participation Mengjin County wastewater treatment project which is a environmental protection project benefiting the society, the state and the people will improve the environmental quality of county seat, help improve the economic strength, social status and population diathesis of Mengjin County, the fulfillment of this project, however, may do a direct or indirect impact to the area where the project is located and its surrounding environment. Therefore, through activities to make knowledge of the status quo of this project and the potential relevant environmental problems, the public may give sound proposals that are 48 vital to the development of economy, the smooth fulfillment of this project. For this reason, the Mengjin Water Undertaking has successively organized twice public-participating rap session, and issued the questionnaire to public opinion to hear from them. 10.2.1 Symposium Description Symposium name: Symposium on Mengjin County wastewater treatment project Time: March 3, 2005-March 9, 2005 Address: Boardroom, third floor, Urban Construction Bureau of Mengjin County Organizer: Mengj in Water Undertaking (chair) Assistor: Luoyang Design & Research Institute of Environmental Protection (technical support) Participant: the Mengjin County People's Congress representative , Political Consultative Conference Representative, Environmental Protection Bureau, Urban Construction Bureau, Water Conservancy Bureau, some leaders of Chengguan Town, staff of Water Undertaking, local ordinary citizen, inhabitants along-the line of project, cadres of Niubuhe Village, farmers whose land is affected, removal inhabitants etc. Symposium process: The leaders of water undertaking present the conditions concerning project plan to those people who is investigated; The Luoyang Design & Research Institute of Environmental Protection presents the problems concerning environmental impact; The conferees air their views to the problems concerning project and environmental impact; Issue, fill in and recover the questionnaire to public opinion. 10.2.2 Statistic to investigations 49 45 shares of questionnaire survey to this project have been issued, and 45 shares have been recovered, with recovery ratio of 100%, the fundamental state for the public participation see to Table 10-1, the statistic to findings see to Table 10-2. Table 10-1 Public Participation Descriptions Symposium time March 3, 2005 March 3, 9 Number of issued questionnaire (share) 22 23 Number of recovery questionnaire (share) 22 23 College level or Above 12 14 Senior middle school or Standard of technical secondary 4 3 culture school Middle school level or below cadre 11 12 Occupation farmer 7 7 ordinary citizen 4 4 over 55 years old 4 5 Age 35-50 years old 15 14 below 35 years old 3 4 50 Table 10-2 Table for statistics to findings of public opinions Investigated item Findings Public illagers ervlic ffectedservant, affected Inhabitants Representative due to ae 1 your relation toremoval nearby this Ordinary of the People's ate his water supply and project (nocitizen Congress, the enterpri e reoal oliticalnerrs project cultivated emoval) and Consultation I_ _Committee 12 4 _ 5 16 . 5 26.7% 8.9% 11.1% 35.5% 11.1% .7% 2 Do you kno Yes o the Mengj in 41 County Wastewater Treatment Plant 91.1% 8.9% is to be constructed? 3 How do you Not Be all th think the ecessary same to necessity o45 construction of this project? 100% Basically Be all the 4 What is you Support Bpport se t Not support _. commet onsupport same to comment on this project? 15 100% Both 5 Which impact aore do your think Favorable Unfavorable A little impact Unclear and this project may avorabl_ do on1 environment? 37 1 4 82.2% 2.2% 6.7% 8.9% It is bothet for ccupy the Affect the . The farmandause Te noiseAfc 6 Where do yo inhabitants it atmosphere affects th centralized the think the cultivated greening ll drain of ildlife adverse impact land belt domestic removed. lays? sewage 14 0 2 110 5 21.5% 46.2% 3.1% 15.4% 7.7% 16.1% 51 7 What kind of Benefit It does no Suffer impact do youfrom it matter from it Not clear think this projecI32 4 9 will do on you? 7 1.1% 8.9% 20.0% Principal causes to support this wastewater treatment project include: * This project, as a key project of the Government of Mengjin County, will benefit the people and help promote the economic development. * This project may help improve the residential environment of the people, optimize the allocation of water source, improve the city grade, and improve the investment environment. *This project may help solve the pollution problems concerning the Chanhe River and groundwater, the sewage after treatment may be recycled. Proposals to reduce adverse impact: *we had better shorten the construction duration, reduce the temporarily occupied time, and recover the temporarily occupied land as soon as possible. .The afforestation work shall be done well with the wastewater treatment plant so as to alleviate the impact to surrounding environment, and the mass work shall be done well and carefully. If you (or unit) are on a position to be removed, your wishes and requests shall be: * The resettlement problem shall be solved in a good way as per relevant policies and laws. * the compensation shall be reasonable, and the funds for land acquisition shall come into position. The most concerned problems to overall project: * When the project will be launched ? * The funds shall come into position as soon as possible. * The compensation fee for land acquisition shall be fulfilled to individual family. * The construction shall be launched as soon as possible, and guaranteed with quality, so that the people may benefit from it as soon as possible. * The transportation and disposal of surplus sludge shall be done well so as to ensure no pollution is caused during transportation. Other comments and proposals: * It is hoped that the upper-level authority give more support to the construction of this project with view to that the funds for construction come to position fully and in advance, the project is launched as soon as possible, and the problem concerning city pollution is removed as soon as possible. * It is proposed that a powerful leading department or a special lead group is established to organize and fulfill this project so as to ensure the sooner and smoother fulfillment of this project. * The management and supervision at construction stage shall be enhanced, so as to reduce th impact to environment as far as possible. 10.2.3 Investigation findings By investigation of public participation, most of the public support the construction of this project, view that this project is necessary, its fulfillment will be in favor of both environment and them; partial public view that the adverse impact of this project mainly embodies where the farmland is occupied and some inhabitants need to 52 be removed, in addition, some public view that the fulfillment of this project may produce waste gas polluting environment and noise affecting the inhabitant' living, and this project may do some impact to the wildlife as well as the city greening belt. The most concerned question of the public involve: (@ Whether or not the funds for project construction come to position, whether or not the project achieves in early launching; Z A rational compensation shall be made to the removal families and the land acquisition, the funds shall come to position timely and to individual family; ( It shall be ensured that the surplus sludge during transportation could not cause any pollution on transportation line; (A) The occupation of farmland and city greening belt during. construction shall be reduced as far as possible, the construction duration shall be shortened and the temporarily occupied lands shall be recovered as soon as possible. In view of overall situation, most of the public support the consruction of this project, favorable measures shall be applied during the construction of or after the operation of this project to reduce its adverse impact as far as possible, so as to prevent from the occurrence of a secondary pollution. As to the problems concerning the removal and land occupancy, we shall do well the works like the propaganda, persuasion, coordination with the government at county level, township level, and the village committee, so as to carry out the removal policy and measures and achieve in timely removal, especially to those farmers who loss their cultivated lands due to this project, we shall guarantee their living sources with a view to accelerating the social stability as well as economic development. 53 Approved Registration Form of Construction Project on Environmental Protection Form-filled unit (Seal): Form-filled person (Signature): Project undertaker (Signature): Project name Wastewater Treatment Project of Mengjin County Construction place Group 13, Niubuhe Village, the Southwest of Mengjin County n Construction scale 20000 m'/d of urban sewage Construction class MNew-built l Rebuilt 0 Technical reconstruction OeCompiling report M Compiling reporting form Otetnusr 9 Control type of environmental protection [OFilling in and submitting registration form o Total investment Investment for environmental (Ten Thousand Yuan) 5101 protection (Ten Thousand Yuan) 110 Proportion 2.16% Project-established Project-established unit Approved file No. date Report approved by Environmental Protection Bureau ofHenan Province Approved file No. Approved date Luoyang Design & Research Institute of Unit name Water Undertaking of Mengjin County Tel 0379-67958813 Unit name Environmental Protection Tel 63482174 -W Floor II, Huaibao Building, Fly-over Address Water Undertaking, Menglin County, Henan Province Post code 471100 9. Address Bridge, Dingnan Road, Luoyang City Post code 471002 Corporate representative Ma Daoxian Contact person Xu Fupo Certificate No. Huan Ping Yi Zi No. B2515 Appraisal fund 40,00OYuan Environmental quality Anibient air: up to T336-79 Surface water: beyond GB3838-2002II Ground water: up to GB/T14848-93 III Ambient noise: up to GB3096-93 Category l Seawater: Soil: Other: OWater-source reserve of drinking water ENature reserve E0 Famous scenery area U Forest park O Basic farmland reserve UOEcological function reserve SSensitive character of S environment OPrevention area against water and soil erosion OEcological sensibility and weakness area ODensely inhabited district tOHistorical and cultural relics under state protection OThree rivers, three lakes, two control area O Reservoir area of the Three Gorges System project Existing project (constructed + constructing) This project (plan to construction) (constructed +constructing+ plan to construction) ,80 0> Dr Regionalbalance =r 0 CL Forecase erement PollutantApproved Productive Self- Approvedtotal byusinga Forecasted Discharging substitutingforthe Polltan d t tdta diW totaotldil increment & ~00 ishri nwoet c n ss quantity ecrement d ischarge tal discharge ncen decrement Mi 5 ri. a~~ . concentration dedischarge substitute t ermn the old one Wastewater 730 730 730 0 Chemical oxygen demand 400 60 2920 60 60 438 2482 438 -2482 2482 Ammonianitrogen 35 8 255.5 8 8 58.4 197.1 58.4 -197.1 197.1 ;F Petroleum Exhaust gas Sulphur dioxide * Soot* Industrial dust* 0 C Nitrogen oxide Industrial solid waste * 0.58 0.58 0 0 0 0 6.13 0 6.13 6.13 6.13 H2S 0.03 0 0.03 0.03 0.03 z ~ __0_03 Notes: 1. The item with* refers to the pollutant which is subject to the state control in total discharge during the Tenth Five-year plan. 2. Discharging increment or decrement (+) Increment (-) Decrement 3. Measurement unit: Wastewater-Ten Thousand Ton/Year, Exhaust gas discharge: 10000 m"Year, Industrial solid waste discharge-Ten Thousand Ton/Year, Discharging concentration of water pollutant-mg/, Discharging concentration of atmospheric pollutant-mg/m', water pollutant discharge-Ton/Year, Atmospheric pollutant-Ton/Year Control item Index Measure Name Grade Impaced e Impacted cLam Protected object Impact site Escape Adjustinprolectod Removal & P oa ndscape desir Ecolg Other Investment (Ten Thousand Yuan) Nature reserve Predicted effect Investment (Ten Thousand Yuan) Water-source reserve Predicted effect o Investment (Ten Thousand Yuan) o o Main wetland Predicted effect Investment (Ten Thousand Yuan) Famous scenery area Predicted effect Tnvestment (Ten T)ousand Yuan) Historical and cultural relics a- Predicted effect Investment (Ten Thousand Yuan) Forest park Predicted effect Investment (Ten Thousand Yuan) ~. Main Ecological function reserve Predicted effect Investment (Ten Thousand Yuan) Predicted effect Investment (Ten Thousand Yuan) Rare plant Predicted effect i Investment (Ten Thousand Yuan) Typical biology Predicted effect Investment (Ten Thousand Yuan) Main emnormc vcies Predicted effect Investment (Ten Thousand Yuan) External species Predicted effect An alternative Fallback Other Populaion relocated dueto land occupied 60 Reld measu Move into the place where it is east 500m to Investment (Ten Thousand Yuan) 64.4 Better life *Predicted effect Betrlf Population relocated due to envimnmemal impact Reload mPe fee Treated area against soil erosion Project control: Biologic control: Noie banier Noise reductio by Removal Sound proof Low-noise Escape SuPervion Other Investment (Ten Thousand Yuan) Affirestationarea 9062.8m' Afrrestation rate40% 27 5 Operation peiod Predicted effect WaskwaterduingomctonperiodSS Sedimentation Materialization reducine5 10db Biomass of occupied land (air-dry weight) Ton/Ha. Before construction After construction Construction Investment(Ten ThousandHYan) period Egineenring earthwork I 'm' 108.4 Predicted effect __________Total (ind occuied Farmland on-upied NurTmoary erm t C armland piBasic farmland Woodland Meadow Pound Other Nature TeaWar Permanent Common farrmland Land Land-ocupiedarea 86713 m' 22657m' 18357m2 _ _- 4300m New increase Re-cultivation area 1 N Jingao Planned plant site high Group 13, Niubuhe Village way 1#AG / 200m 2#AGbra branch Tail water Preparatory land for development Ash Ground of Yonglong Power Company ' 1# 'Chanhe River Legend Monitoring section of surface water A Monitoring point of ambient air 0 Monitoring point of noise (D Monitoring point of ground water Attached Figure II Schematic Drawing of Monitoring Points
Группа Всемирного банка · Environmental Assessment
China - Henan Towns Water Supply and Sanitation Project : environmental assessment (Vol. 1 of 4) : Environmental impact of wastewater treatmen
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