青岛理工大学毕业设计（论文）用纸PAGE\*MERGEFORMATIII摘要本次毕业设计的题目为山东省B市城市污水处理厂设计，主要任务是对污水处理厂一期工程进行设计，掌握工程设计的基本步骤，掌握城市污水处理工艺设计、厂区平面布置以及各处理单元构筑物设计计算的基本方法。污水处理厂三期的总处理规模为4.5万吨/日。进水水质：CODCr：550mg/L，BOD5：250mg/L，SS：280mg/L，NH3-N：46mg/L，TN：58mg/L，TP：6.5mg/L。要求处理后水质达到国家《城镇污水处理厂污染物排放标准》（GB18918-2002）一级A标准的要求：CODCr≤50mg/L，BOD5≤10mg/L，SS≤10mg/L，NH3-N≤5mg/L，TP≤0.5mg/L。本设计根据其进水水质、水量及出水情况，分析比较了各种污水处理工艺，确定该污水处理厂采用倒置的A/A/O工艺，该工艺具有处理效果好，出水水质稳定，运行管理方便，基建与运行费用低等特点。产生的污泥经浓缩、脱水后外运。主要设计内容包括：污水处理工艺选择及各工艺单元的设计(包括工艺流程的确定及各单体构筑物的设计)；污泥处理工艺设计(包括工艺流程的确定及各单体构筑物的设计)；污水处理厂的平面及高程布置(包括污水处理厂处理构筑物和辅助构筑物的平面图及高程图的绘制)。关键词：污水处理，倒置A/A/O工艺，污泥处理，平面布置，高程布置ABSTRACTThegraduationdesigntopicistodesignBcity’swastewatertreatmentplantofSHANDONG.Themaintaskistodesignthewastewatertreatmentplant’sfirstproject,masterthebasicstepsinengineeringdesignandthecitywastewatertreatmentprocessdesign,factorylayoutandeachprocessingunittobuildabasicmethodindesignandcalculation.Thetotalconstructionscaleofthefirstprojectis100000m3/d;Theoriginalwater:CODCr:550mg/L,BOD5:250mg/L;SS:280mg/L;NH3-N:46mg/L;TN:58mg/L;TP:6.5mg/Lforhandlingthewaterqualitytoachievethecountry"theurbanwastewatertreatmentplantemissionsstandards(GB18918-2002)level1Astandardrequirements:CODCrlessthan50mg/L,BOD5lessthan10mg/LBOD5,SSlessthan10mg/L,NH3-Nlessthan5mg/L,TPlessthan0.5mg/L.Inthispaper,accordingtothefeedwaterquality,waterquantityandwatersituation,analysesandcomparestheallkindsofwastewatertreatmentprocess,determinethesewagetreatmentplantusingtheseparateinflowingreversedA/A/Oprocess,theprocesshasgoodeffect,stablewaterquality,easyoperationandmanagment,infrastructureandlowoperationcost.thesludgeistransportedoutoftheplantafterconcentrationanddehydration.Themaindesigncontentincludes:choosingthewastewatertreatmentprocessandtheprocessofdesignunit(includingprocessflowandthedeterminationofthemonomerstructuresdesign);Thesludgetreatmentprocessdesign,(includingprocessflowandthedeterminationofthemonomerstructuresdesign);Wastewatertreatmentplantstheplaneandelevationlayo