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1、污水处理厂初步设计方案24摘要本设计是天津市某开发区污水处理厂的初步设计和施工图设计。该处理厂处理城市污水。水质较复杂：悬浮物（SS）：200mg/L；五日生化需氧量（BOD5）：200mg/L；化学需氧量（CODcr）：400mg/L；总氮（N）：40mg/L；总磷（P）：4.0mg/L；重金属及有毒物质：微量；处理后的水质要求：BOD5≤20mg/L；SS≤20mg/L；N≤15mg/L；P≤1mg/L；根据设计要求和求新的思想，该污水处理工程进水中氮、磷含量均偏高，在去除BOD5和SS的同时，还需要进行脱氮除磷处理，故采用当代水处理工艺中较流行的三沟式氧化
2、沟工艺。该工艺综合了以往工艺的优点，具有广泛的适应性，完全适合本设计的实际要求。本工艺的主要构筑物包括闸门井、格栅、污水泵房、曝气沉砂池、氧化沟、接触池、浓缩池、污泥脱水机房等。本设计采用了脱氮除磷工艺和性能优良的设备，且工艺流程简单，省去了初沉池、二沉池、消化系统和回流设备，节省了基建投资和运行费用，同时曝气设备和构造形式多样，运行灵活，管理方便，保证出水达到污水排放标准，做到了水资源的合理利用。关键词：三沟式氧化沟格栅浓缩池泵房新工艺AbstractItisapreliminarydesignandconstructiondrawingforthesewag
3、etreatmentplantdevelopmentzoneofTianjin.Thisplanttreatmunicipal24sewage,mainly.Itswaterqualityismorecomplicated:Suspendedsubstance(SS):200mg/L;Thebiochemicaloxygendemand(BOD5)offivedays:200mg/L;Thechemicaloxygendemand(CODcr):400mg/L;Totalnitrogen(N):40mg/L;Totalphosphorus(P):4.0mg/L;
4、Heavymetalandnoxioussubstance:Trace;Treatedwaterqualityisrequired:BOD5≤20mg/L;SS≤20mg/L;N≤20mg/L;P≤1mg/L;Accordingtothedesigningrequirementandthoughtoflookingfornovelty:thecontentofnitrogenandphosphorusareonthehighsideinthisprojectwaterquality,soitshoudbedealedwith,whilegetridofBOD5a
5、ndSS.Weadoptanduseakindofcraft,whichisacomparativelyextensivedenitrificationcraftsatpresent,namely,3ditchtypeoxidizingcraft.Theadvantageofthiscomprehensivecraftisextensiveadaptability,totallysuitableforrealityoriginallydesigned'spurpose.Itsmainstructuresincludgatewell,grid,sewagepump
6、inghouse,earateandsinkingsandpool,oxidizingditch,contactingpool,concentrationtank,mudtodehydrateinthecomputerlabetc.Thisdesignhaveadoptedthedenitrificationcraftandequipmentofgoodperformance,andtheprocedureissimple,managementisconvenient,donotneedtoaddthefirstsinkingpool,thesecondsink
7、ingpool,digestivesystem.reducingbuildingandoperatingexpenses,realizingautomationtotallyatthesametime,easytomanage,makingthetreatedwaterreachsewagedischargestandard,accomplishtherationalutilizationofwaterresource.Keywords:Typesofthreeditchoxidizingditch,Grid,Concentrationpool,Pumpingh
8、ouse,Newcraf
