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1、大学本科生毕业论文(设计)辽宁省北部地区C市的城市排水工程毕业设计摘要水资源短缺已经成为全社会都要关心的问题,环境的恶化要求我们更合理的利用水,高效的处理水,综合利用回用的水。国家也相继出台了一系列污水排放标准,来约束监督各单位对水环境的破坏,以达到保护水资源、防治水污染、改善水环境。本设计以一个虚拟的辽宁北部城市作为设计样本,并综合考虑辽宁省北部人口基数大,老工业基地分布密集,水资源短缺等因素进行水处理工艺的选择。本设计要处理的污水中,不仅汇入了辽宁省C市的城市生活污水、还汇入了食品厂、肉联厂
2、、制革厂等企业排放出来的工业污水,因此进入该城市污水处理厂的水质相对比较复杂。根据设计要求,污水经处理后,其水质要达到GB18918-2002中一级B标准,应当满足:SS≤20mg/L,COD≤20mg/L,BOD≤20mg/L。基于上述原因,我在老师的指导下,应用所学的专业知识,在充分调研受纳水体水质资料、人口分布和气象条件的情况下,对包括排水管网和污水处理厂的整套排水设施进行设计。鉴于出水要求和出水水质,本设计中污水厂采用A2/O法为主体的工艺来处理污水。关键词: 城市污水处理厂,进水水质,
3、出水水质,A2/O法-95-大学本科生毕业论文(设计)ProcessesDesignofMunicipalSewageTreatmentSysteminCCityLiaoningProvinceinnorthernAbstractWaterresourcesshortagehavealreadybecomethequestionwhichthewholesocietyshouldcareabout,deteriorationoftheenvironmentrequireusmorerationa
4、lwaterofuse,high-efficientwateroftreatment,utilizewaterofretrievalandutilizationsynthetically.Governmentissuesaseriesofsewagedischargestandardstoo,torestrainsupervisingperunitofdestructiontowaterenvironment,soastoprotectthewaterresource,preventandcur
5、ethewaterpollution,improvethewaterenvironment.ThisdesignbyahypothesizedLiaoningnortherncitytookthedesignsample,andthesynthesisconsiderednorthLiaoningProvincepopulationbasebig,oldindustrialbasedistributioncrowded,thewaterresourcesisshortandsoonthefact
6、orcarriesonthewatertechnologythechoice.Thisdesignneedstoprocessinsewage,notonlycollectedintotheLiaoningProvinceCcitymunicipalsewage,hasalsocollectedintotheindustrialsewagewhichenterpriseandsoonfoodproductsfactory,meatproductsfactory,tannerydischarged
7、,thereforethiscitysewagetreatmentplantthewaterqualityquitetobecomplex.Accordingtodesignstherequest,thesewageafterprocessing,itsinflowqualitymustachieveinGB18918-2002thelevelofBstandard,mustsatisfy:SS≤20mg/L,COD≤20mg/L,BOD≤20mg/L.Basedontheabovereason
8、,Iunderteacher'sinstruction,applythespecialized-95-大学本科生毕业论文(设计)knowledgewhichstudies,inthefullinvestigationandstudythewaterquality,thepopulationdistributionandinthemeteorologicalconditionsituation,toincludethedrainingwaterpipenetworkandthesewagetrea