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毕业设计（论文）报告纸共5页第1页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊苏南地区乡镇污水处理厂设计总说明1项目概况本目建设用地位于长江下游南岸，江苏省东南部。本地区位于太湖流域保护区的重要影响位置，属于二级保护区。地区地面水环境的污染将直接影响太湖流域用水水质，近年来太湖水体富营养化日益严重，迫切需要对流域范围内的城镇所排放的污水进行有效的处理，以控制太湖流域的水污染。这就是建设该污水处理厂的根本原因。本毕业设计内容为该社区污水处理工程工艺设计，设计污水量40000m3/d，为保证处理效果，拟选用成熟可靠的A2/O工艺。2设计标准（1）城镇污水处理厂污染物排放标准》（GB18918－2002）；（2）《室外排水设计规范》（GB50014－2006）；（3）《泵站设计规范》（GB/T50265-97）；（4）《污水综合排放标准》（GB8978-1996）；（5）《地表水环境质量标准》（GB3838-2002）。3设计原则（1）贯彻国家关于环境保护的基本国策，执行国家的相关法规、政策、规范和标准；（2）污水处理厂作为环保工程，设计中尽量减少污水处理厂对环境的负面影响，如气味、噪音、固体废弃物等；（3）污水处理工艺的选择必须根据原水水质与水量，受纳水体的环境容量与利用情况，通过经济技术比较优先采用低能耗、低运行费用、低基建费用、占地少、操作管理方便成熟的处理工艺；（4）积极慎重地采用经过鉴定或实践证明是行之有效的新技术、新工艺、新材料和新设备。污水处理厂出水水质达到国家和地方现行的有关规定；（5）污水处理设备、仪表选用首先立足于国内，对目前暂不能生产或质量尚未过关的部分产品考虑适当引进；毕业设计（论文）报告纸共5页第2页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊（6）污水厂总平面布置力求紧凑，土方平衡，减少占地和投资费用；（7）以人为本，充分考虑便于污水厂运行管理的措施。4工艺简介根据本次设计污水水质和处理要求，结合工程处理规模、当地地理和气候环境等因素确定该工程工艺流程图如下所示：5技术经济指标污水处理厂工程总投资10250.4万元，污水单位处理成本1.074元/t。【关键词】污水处理厂设计城市生活污水A2/O处理工艺细格栅沉砂池初沉池配水井厌氧池缺氧池好氧池二沉池混合液回流污泥泵房储泥池剩余污泥浓缩机脱水机外运污泥回流进水出水毕业设计（论文）报告纸共5页第3页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊A2/OProcessforMunicipalWastewaterTreatmentGeneralStatementofDesign1DesignTaskAccordingtotheoverallplanningofacityinsouthernJiangsuregion,morecompletemunicipalutilitiesinindustrialandagriculturaltownsareunderconstruction.Withthedeepeningofreformandopeningupandrapiddevelopmentofindustrialandagriculturaleconomy,thesizeandpopulationofurbanareincreasingdaybyday.in2006,thewholecitypopulationreaches395239,whiletheareatotaloutputvalueis26,730,000,000Yuan,andthegrossvalueofindustrialoutputis82,940,000,000Yuan.Becauseofthequickdevelopmentofunder-governingcities,thevolumeofcontaminatedwaterincreasesunceasingly.butthesewagetreatmentsystemdoesnothavethesynchronizedconstruction.therefore,thenaturalwaterbodypollutioninthetownshipbecomemoreandmoreserious,andthegroundwaterenvironmentqualityworsensdaybyday.Simultaneouslyithasalsobroughttothegroundwaterqualityadverseeffect.ThecitylocatesattheimportantpositionofTaiLakebasinprotectorate's,belongingtothesecond-levelprotectorate,sotheenvironmentalpollutioncausedbysurfacewaterareaswilldirectlyaffectthewaterqualityofTaihuLakeBasinwater.InrecentyearseutrophicationofTaihuLakebecomeincreasinglyserious,sothereisanurgentneedtotreatthesewagedischargingbythesestownstocontrolwaterpollutioninTaihuLakeBasin.Thisisthetherootcauseofconstructingthesewagetreatmentplant.ThecontentsofthegraduationprojectistodesignamunicipalwastewatertreatmentplantinthesouthernJiangsuProvince.Thesewageflowis40000m3/d.Inordertoensurethetreatmenteffect,thematureandreliableA2/Oprocessischosen.2DesignStandard(1)《thepollutantdischargeofurbansewagetreatmentplant》（GB18918－2002）;(2)《Codefordesignofoutdoorwastewaterengineer》（GB50014－2006）;(3)《Designcodeforpumpingstation》（GB/T50265-97）;(4)《Integratedwastewaterdischargestandard》（GB8978-1996）;(5)《EnvironmentalQualityStandardforSurfaceWater》（GB3838-2002）毕业设计（论文）报告纸共5页第4页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊3DesignPrinciple(1)Implementthenationalpoliciesofenvironmentalprotection,relevantpolicies,regulationsandstate-levelnormsandstandards;(2)Asaenvironment-friendlyproject,thewastewatertreatmentplanttriestominimizeitsnegativeeffectontheenvironmentsuchasunpleasantodor,noise,solidwastewater,etc;(3)Thechoosingoftreatmentprocessshouldbaseontheinfluentcharacterandtheenvironmentalcapacityandusingstateofacceptingwaterbody.Throughtheeconomicalandtechnologicalcomparisonbetweenseveralalternativedesignsschemes,processwhichtheenergyconsumptionislower,expenseforoperationandinfrastructureconstructionislessandmanagementismoreconvenientwillbethepriorityone.(4)Newtechnology,process,materialandequipmentproventobeeffectiveandefficientaretobeusedcautiously.Theeffluentqualityshouldmeetthecurrentstateandlocalstandard;(5)Thepriorityoftheequipmentsandinstrumentsselectionshouldconsiderthedomesticproductsfirstly.Theproductswhichcan’tbeproducedormeetthequalitystandardshouldbeintroducedcautiously;(6)Theplanningofthetreatmentplantshouldbecompactconsideringtheearthworkbalancetoreduceoccupationoflandandinvestmentcost;(7)Thedesignshouldhavefullconsiderationforthepeopleandstaffs.Measuresshouldbetakentomakethemanagementandoperationmoreconvenient;4BriefIntroductionoftheProcessAccordingtowastewaterqualityandtreatmentdemandofTongzhouSouthernRegionWastewaterTreatmentPlant,consideringthefactors,suchaslocalgeographicalandclimateenvironmentandeconomicalandtechnologicalconditions,etc,theprocessdiagramisasfollowing:PrimarysettlingtankFineScreen,gritremovalchambersInflowPumpRoomCoarsescreenInflowDischargeA2/OAeration毕业设计（论文）报告纸共5页第5页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊5TheEconomicalandTechnologicalIndexTotalInvestment:102,504,000RMB;OperatingCost:1.074RMB/m3wastewater(treatmentfordischarge);【Keywords】Wastewatertreatmentplantdesign;Municipalwastewater;A2/O毕业设计（论文）报告纸共Ⅳ页第Ⅰ页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊目录第一部分...................................................................................................................................................11概述...