搜索
建德市乾潭镇污水处理厂首期5000吨/日建设项目环境影响报告书（简要本）浙江大学环境影响评价研究室InstituteofEnvironmentalImpactAssessmentZhejiangUniversity国环评证：甲字第2002号二○○七年五月目录1.项目概况······················································································11.1项目由来······················································································11.2项目基本内容················································································12.工程内容······················································································22.1拟建项目工程内容··········································································22.2工程分析······················································································33.选址周围环境及保护目标·································································33.1环境质量现状················································································43.2环境保护目标················································································44.环境质量影响预测评价主要结论························································44.1水环境质量影响预测评价·································································54.2大气环境质量影响预测评价······························································54.3声环境质量影响预测评价·································································64.4固体废物环境影响分析····································································65.对策措施······················································································75.1清洁生产措施················································································75.2水、气、声、固废污染治理措施························································75.3主要的环保监管措施·······································································95.4征地拆迁安置················································································95.5环保投资····················································································106.总量控制及公众参与······································································116.1总量平衡方案及措施······································································116.2公众参与····················································································127.环境可行性分析及评价结论····························································128.环评总结论·················································································168.1环评建议····················································································168.2环评总结论·················································································17附图：附图1建设项目地理位置图附图2建设项目环境概况图附图3建设项目总体平面布置图附件：附件1关于乾潭镇污水处理厂可行性研究报告的批复附件2建设项目规划红线建德市乾潭镇污水处理厂首期5000吨/日建设项目环境影响报告书简要本浙江大学环境影响评价研究室-1-1.项目概况1.1项目由来目前，乾潭镇还没有完善的污水排水系统和污水处理厂，生活污水未经处理直接排放，对周围水体造成一定程度的污染。从目前胥溪及富春江的水质现状和发展趋势来看，水质不容乐观，水污染不仅威胁周边居民的健康，同时也影响乾潭镇旅游事业的开发，并直接影响下游杭州市居民饮水质量，导致钱塘江流域的水质进一步的恶化。因此将乾潭镇内所有的工业废水和生活污水全面截留集中处理，以减少由于乡镇工业废水和生活污水排放而引起的内河水质下降是十分必要的。本工程是改善投资环境、促进经济发展的重要基础设施。经济发展必须走可持续发展道路，要加大招商引资力度，加快外向型经济的发展，而要做到这一点，必须首先搞好区域的基础设施建设，本工程是重要的基础设施之一。通过本项目的实施，对乾潭镇镇中心的生活污水和污染企业进行综合整治，截污外排，可有效的改善乾潭镇的地面水环境质量，从而改善当地的投资环境。为此建德市乾潭镇决定建立乾潭镇污水处理厂，其厂址位于乾潭镇乌龙山脚下胥溪南侧。首期规模为5000m3/d，远期为20000m3/d（本次评价为首期5000m3/d项目）。它的建成将为保护乾潭镇和下游杭州市的水资源，保证居民的健康，进一步改善乾潭镇的环境，推进旅游事业的开发，促进乾潭镇社会经济的可持续发展，因而建设乾潭镇集中污水处理系统是十分必要和迫切的。1.2项目基本内容项目名称：建德市乾潭镇污水处理厂首期5000吨/日建设项目项目立项：关于乾潭镇污水处理厂可行性研究报告的批复工程性质：新建项目；项目投资：4800万元。建设规模：根据项目建议书及可研，建德市乾潭镇污水处理厂首期5000吨/日建设项目内容包括污水处理工程，本工程首期实施5000吨/日。建设地点：项目拟选址位于乾潭镇乌龙山脚下胥溪南侧江龙口地块建德市乾潭镇污水处理厂首期5000吨/日建设项目环境影响报告书简要本浙江大学环境影响评价研究室-2-2.工程内容2.1拟建项目工程内容该项目工程内容包括污水处理厂、配套管网建设。该项目总投资4480万元。工程建设期约2年。2.1.1污水处理工程设计的污水处理规模为日处理生活及工业污水5000吨，服务范围包括乾潭镇镇区内的污水、陵上水晶园区、五金工业功能区及蒋家畈商贸区的污水。该工程项目建议书确定A2/O方案为该工程的推荐方案。污水处理工程设计出水水质：pH：6～9、CODCr：60mg/L、BOD5：20mg/L、SS：20mg/L、TP：1.0mg/L、NH3-N：8（15）mg/L。2.1.2配套管网工程1、排水体制及设计规模根据建德市乾潭镇总体规划，本项目服务范围内规划排水体制为雨污分流制，雨水管网的建设不包括在该工程中；污水管网的布置原则上把生活污水和工业污水合流排放，布置一套管网系统，进入本项目处理。污水总处理规模远期为2万t/d。2、管线布置污水收集污水管网包括乾潭镇区块收集管网和该区块现有污水排放口至污水处理厂的输送管网。根据可行性研究报告的论证，该项目位于乾潭镇区块的下游，地势较低，可采用重力自流方式收集和输送，沿途无需设立污水提升泵房，污水管网系统按远期输送污水量总计20000m3/d一次性考虑。详见附图5污水收集输送管道布置图。结合乾潭镇区块地形特点，合理分配排水流域，使主干管两侧排水流域面积接近，以便减少穿越道路的次数。根据乾潭镇总体规划和确定的工程服务区域，污水收集和输送干管由北向南布置。污水收集输送管线统计详见表3-5。2.1.3总平面布置厂区平面按远期规模规划、布置，按功能进行分区，由于乾潭镇全年主导风向为东北风，因此，将办公区和生活区置于厂区北侧，离生产区保持一定距离，并用绿化带隔离，使之有良好的环境。生产区内，将环境污染较为严重的污泥处理设施布置在厂区西侧。变配电间位于厂区负荷中心（污水泵房和生化池）旁，以减少线路建德市乾潭镇污水处理厂首期5000吨/日建设项目环境影响报告书简要本浙江大学环境影响评价研究室-3-损失，节约能源。厂区干道宽6m，基本呈环状布置，便于车辆进出、管道养护及满足消防要求。道路与建（构）筑物间操作人员出入处用人行道板相连。在厂区北侧建进厂道路。周围和厂内空地将充分绿化，绿化率控制在总面积的30%。2.1.4排放口方案根据工程项目建议书，尾水排放采用就近原则，处理后尾水即排放胥溪，通过胥溪向富春江干流排放，富春江下游江段江道相对较为稳定，水深条件好，具有较强的稀释扩散能力，尾水排放口距离富春江干流4000m。2.1.5人员参照《城镇污水处理厂附属建筑和附属设备设计标准》，结合本厂的实际情况，确定该项目劳动定员10人。2.1.6拟建项目地及拆迁情况拟建址范围内将有部分农居涉及拆迁，根据乾潭镇人民政府（经建德市人民政府确认）出具的相关文件，该部分拆迁工作已经得到落实。根据项目卫生防护距离设置要求，该项目经环境影响分析，确定生化池卫生防护距离200m，污泥池为200m。2.2工程分析根据工程分析结果，该工程项目营运期污染源强见下表。表2-1该项目工程污染源强汇总表项目污染物产生量（t/a）削减量（t/a）排放量（t/a）废水污水量178.12万0178.12万CODCr676.86569.99106.87BOD5213.74178.1235.62NH3-N44.5326.1418.39TN71.2535.6335.62TP5.343.561.78废气NH31.6501.65H2S0.00500.005固废污泥109510950生活垃圾3.123.120建德市乾潭镇污水处理厂首期5000吨/日建设项目环境影响报告书简要本浙江大学环境影响评价研究室-4-3.选址周围环境及保护目标3.1环境质量现状1、水环境质量现状。水质现状监测结果表明：现有污水排污口断面除pH值外均出现超标，而且总氮及石油类超标严重；拟建污水厂排