..精选精选.精选城市污水处理工艺的设计摘要该毕业设计的题目为5万吨/天城市污水处理工程设计，应用的处理工艺为AAO工艺，具有脱氮除磷的效果。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。根据毕业设计的原始资料及设计要求对出水水质的要求：及要求脱氮除磷，确定A2/O和氧化沟、SBR、AB法污水处理工艺进行设计和经济技术比较。通过投资概算，运行费用的计算，经济比较及技术比较等最总确定A2/O工艺为最佳方案。该污水厂的处理流程为：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；从反应池排出的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,comparingofconomyandtechnologyect,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设计目的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_Toc282502