摘要本毕业设计题目为“3000吨/d小区中水回用设计”，主要任务是对小区中水站的处理工艺系统进行设计。通过对我国中水处理工程项目的研究，以及对多种中水净化工艺进行综合比较，采用“生物接触氧化法＋混凝沉淀”作为主体工艺对住宅小区杂排水进行处理。该工艺具有运行安全，占地面积小，投资省，操作方便等优点。本设计对该小区的地埋式中水站进行设计计算，并绘制2份总平面图，1份工艺流程图，主要处理构筑物图5份。处理流程如下。原水→溢流井→格栅→隔油池→毛发聚集器→调节池→生物接触氧化→沉淀池→过滤→消毒→中水关键词：中水回用；生物接触氧化法；混凝沉淀Abstract“3000t/ddistrictwaterreusedesign”isthegraduationdesigntitle;itsmaintaskistodesignthereclaimedwatertreatmentsystemofthewaterstationinhousingdistrict.Bystudyingthewatertreatmentprojectsinourcountry,andconductingcomprehensivecomparisonofvariouswaterpurificationprocess,the“Biologicalcontactoxidation+Coagulationsedimentation”wasasmainprocesstodisposethemiscellaneouswastewaterfromresidentialdistrict.Operationsafety,smalloccupationarea,lowinvestment,convenientoperation,etc,arecharactersoftheprocess.Thedesigncalculationofburiedwaterstationindistrictwasdid,andtwoportionoftotalplanargraph,aprocessflowdiagram,fiveportionofmaintreatmentstructuregraphweremadeinthedesign.Theprocessingflowasfollows.Rawwater→overflowwell→grid→oilseparationpool→hairinterceptor→waterregulatingtank→biologicalcontactoxidation→sedimentationtank→filtration→disinfection→reclaimedwaterKeywords:reclaimedwaterreuse;biologicalcontactoxidation;coagulationandprecipitation目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc326577017"摘要PAGEREF_Toc326577017\hIHYPERLINK\l"_Toc326577018"AbstractPAGEREF_Toc326577018\hIIHYPERLINK\l"_Toc326577019"1、引言PAGEREF_Toc326577019\h1HYPERLINK\l"_Toc326577020"1.1研究背景PAGEREF_Toc326577020\h1HYPERLINK\l"_Toc326577021"1.1.1我国水资源的状况PAGEREF_Toc326577021\h1HYPERLINK\l"_Toc326577022"1.1.2解决水资源紧缺的途径PAGEREF_Toc326577022\h1HYPERLINK\l"_Toc326577023"1.1.3我国中水回用的发展状况PAGEREF_Toc326577023\h1HYPERLINK\l"_Toc326577025"1.2住宅小区中水回用PAGEREF_Toc326577025\h2HYPERLINK\l"_Toc326577026"1.2.1相关术语PAGEREF_Toc326577026\h2HYPERLINK\l"_Toc326577027"1.2.2中水回用目的PAGEREF_Toc326577027\h2HYPERLINK\l"_Toc326577028"1.2.3中水回用的