本科毕业设计说明书题目：聊城市冠县污水管网和污水处理厂的设计院（部）：市政与环境工程学院专业：给水排水工程班级：水工姓名：学号：指导教师：完成日期：2012.6山东建筑大学毕业设计说明书摘要本次设计为聊城市冠县污水管网和污水处理厂的设计。设计人口密度为360cap/ha，污水量标准为140L/（cap·d），污水管网遍布整个城区，污水管网全长46.69公里，污水管网服务面积977.27公顷。根据城区地形等因素，确定确定污水主干管和干管。经过水力计算，最大埋设深度为7.88m，最大管径为DN1300，管材采用钢筋混凝土。污水处理厂位于聊城市冠县东南部。污水处理量75000m3/d，占地75364m2。根据进、出水水质及脱氮除磷的要求，采用A-A-0曝气池工艺，其处理流程为：进水→粗格栅→泵站→细格栅→沉砂池→初沉池→A-A-0曝气池→二沉池→混合→过滤→消毒→出水。出水水质基本《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级A标准。管网总投0.59亿元，污水处理厂总投资为1.2亿元，处理水成本为0.747元。关键词：污水管网；污水处理；A-A-O；脱氮除磷I山东建筑大学毕业设计说明书ABSTRACTThisisadesignofwastewatertreatmentplant&wastewaterpipenetworkforliaochengcity.Thepopulationdensityofthisdesignis360cap/haandthewastewaterdischargequotais140L/(cap·d).Thedrainagepipenetworkbasicallycoversalloverthetown.Thewholelengthofthewastewaterpipenetworkisabout46.69kmandtheserviceareaofthenetworkisabout977.27hectares.Accordingtothelandformoftheliaochengcity,thepipenetworkschemesarecompleted.Hydrauliccalculationshowedthatthemaximalburialdepthofthepipenetworkis7.88mandthemaximaldiameterofpipesisDN1300.Thereinforcedconcretepipesareadoptedinthisdesign.Thewastewatertreatmentplantliesinthesoutheastofliaochengguanxian.Thedisposedscaleofwastewatertreatmentplantis75000m3/danditsareaisabout75364m2.Accordingtothedemandofnitrogenandphosphorusremoval,alsothequalityoftheinfluentandeffluent,A-A-O.Thetreatmentprocessisasfollow:InfluenCoarsegrid→Pumpinghouse→Thingrid→Gritchamber→Anaerobicpond→A-A-O→Secondarysedimentationtank→tertiarywastewatertreatment→Effluent.Thequalityoftheeffluentwouldreachthestandard-AoftheⅠ《Dischargestandardofpollutantsformunicipalwastewatertreatmentplant》(GB18918-2002).KeyWords:Wastewaterpipenetwork;Wastewatertreatment;A-A-O;nitrogenandphosphrousremoval摘要..........................................................................................................................................................................IABSTRACT...............................................................................................................................................................I第一章毕业设计任务及要求.............................................................................................................................-1-Ⅴ山东建筑大学毕业设计说明书1.1毕业设计任务...........................................................................................................................................-1-1.2毕业设计原始资料....................................................................................................................................-1-第二章聊城市冠县城区排水管网设计.............................................................................................................-3-2.1排水管网的规划和布置............................................................................................................................-3-2.1.1排水管网的规划.......................................................................
