城市污水处理工艺得设计摘要该毕业设计得题目为5万吨/天城市污水处理工程设计,应用得处理工艺为AAO工艺,具有脱氮除磷得效果。进水水质为CODCr=300mg/L，BOD5=250mg/L,SS=200mg/L，TN=30mg/L,TP=6mg/L，pH=7、0～8、5，出水水质为CODCr≤100mg/L，BOD5≤20mg/L,SS≤20mg/L,TN≤15mg/L，TP≤1mg/L,达到污水排放二级标准。根据毕业设计得原始资料及设计要求对出水水质得要求:及要求脱氮除磷，确定A2/O与氧化沟、SBR、AB法污水处理工艺进行设计与经济技术比较。通过投资概算,运行费用得计算,经济比较及技术比较等最总确定A2/O工艺为最佳方案。该污水厂得处理流程为:从粗格栅到泵房到细格栅到沉砂池，进入反应池，进入辐流式二次沉淀池,再进入消毒池，最后出水;从反应池排出得剩余污泥集中输送到污泥浓缩池，由剩余污泥泵直接输送到污泥脱水房脱水,最后外运处置。关键词：A2/O工艺脱氮除磷污水处理AbstractThesubjectofgraduationis5104tons/dayofmunicipalwastewatertreatmentengineeringdesign,ProcesstheapplicationprocessfortheAAO,Hastheeffectofnitrogenandphosphorusremoval、InfluentwaterqualityisCODCr=300mg/L，BOD5=250mg/L，SS=200mg/L,TN=30mg/L，TP=6mg/L，pH=7、0~8、5，EffluentwaterqualityisCODCr≤100mg/L,BOD5≤20mg/L,SS≤20mg/L,TN≤15mg/L，TP≤1mg/L,tosecondareffluentstandards、Accordingtotheprimitivdataofthegraduationprojectanddemandingforwaterquality:CampareA2/Ocraftwithoxidizeditchcraft，SBRcraft,ABcraftandchoosethebetteronefromtwomajorsewagedisposalcraft、Throughthebudgtaryestimatingofinvestment,operatingthecalcuiationoftheexpenses,paringofconomyandtechnologyect，finallywehavetheA2/Oditchisthebestscheme、Thesewagetreatmentplantprocessis:fromcoarsetofinegridtothegridtopumpgritchamber,Intothereactionpool,Radialflowintothesecondarysedimentationtank,Re-enteringthedisinfectionofpool，Finallyoutflowofwater、Dischargedfromthereactorsludgeconcentrationdeliveredtothesludgethickener、Bythesludgepumpdirectlytothesludgedewateringhousedehydrated,andfinallySinotransdisposal、Keywords:A2/Oprocess,NitrogenandPhosphorusRemoval,SewageTreatment目录TOC\o”1—3”\h\uHYPERLINK\l_Toc7714引言PAGEREF_Toc77141HYPERLINK\l_Toc18921第一章概述PAGEREF_Toc189212HYPERLINK\l_Toc177921、1设计题目PAGEREF_Toc177922HYPERLINK\l_Toc316511、2设计目得PAGEREF_Toc316512HYPERLINK\l_Toc116371、3设计要求PAGEREF_Toc116372HYPERLINK\l_Toc282851、4设计步骤PAGEREF_Toc282852HYPERLINK\l_Toc28250第二章污水处理工艺流程说明PAGEREF_Toc282502HYPERLINK\l_Toc47602、1气象与水文资料PAGEREF_Toc476