10000m3d生活污水处理及回用工艺设计

XXXX大学本科毕业设计（论文）-1-10000m3/d生活污水处理及回用工艺设计摘要：我国是一个水资源匮乏的国家，尤其是近20年来随着我国城市化进程的发展及城市人口的递增，生活污水排放量日益增多，水污染问题日趋严重。大量未经处理的污水直接排放，不但造成环境污染而且制约我国经济发展，同时造成了水资源的浪费，因此提出了处理后的污水回用的观点并得到了应用。目前最普遍的生活污水处理方法是活性污泥法，同时，氧化塘、A/O法、SBR法等也在污水处理厂的建设中得到应用。本设计采用以SBR法为主体的生活污水处理工艺，其主要流程为格栅→沉砂池→调节池→SBR池→中间池→过滤器→接触池，使出水达到《城市污水再生利用城市杂用水水质》(GB/T18920-2002)的要求并回用，本设计通过沉砂池的计算、SBR池的计算、过滤设备的计算与选型，对10000m3/d生活污水的处理及回用进行了工艺设计。处理后的污水可用于城市绿化、洗车、扫除洒水、厕所便器冲洗等，减轻我国污水对环境的污染和缓解我国水资源短缺的问题。关键词：生活污水；SBR工艺；深度处理；回用XXXX大学本科毕业设计（论文）-2-ProcessDesignofTreatingandReusing10000m3/dDomesticSewageAbstract:Chinaisacountrythatlackofwaterresources.Overthepast20years,astheurbanizationdevelopedandtheurbanpopulationincreased,thetotalamountofsewagedischargedincrease，theproblemofwaterpollutionhasbecomeincreasinglyserious.Largeamountsofuntreatedsewagedischargedirectly,whichcauseenvironmentalpollutionandrestrictChina'seconomydevelopment,atthesametimeinducetowaterwaste.Thereforetherecyclingoftreatedwastewaterhadbeenpresentedandapplieduniversally.Atpresent,themostcommonmethodsusedtotreatdomesticsewageisactivatedsludgeprocess,atthesametime,oxidationpond,aerobic/anoxicprocess,sequencebiologyreactorarealsowidelyappliedinthesewagetreatmentplant.Inthisdesign,SBRmethod,themainlyusedprocesstotreatsewage,hasbeenadopted.Themainflow-chartshowasfollowingscreening→gritremovalchamber→equalizationbasin→SBRtank→filter→contacttank,theeffluentcanmeettherequiredlevelofreuseofrecyclingwaterforurban-Waterqualitystandardforurbanmiscellaneouswaterconsumption(GB/T18920-2002)andreuse.Theprocessfortreatingandreusing10000m3/ddomesticsewagehasbeendesigned,thesizeofthegritchamber,theSBRtankandthefilteriscalculatedrespectively,andfilterequipmentischosen.Thetreatedwatercanbeusedforurbangreening,carwashing,removingthesprinkler,toiletflushing,etc.whichreducesewagepollutionoftheenvironmentandmitigatetheproblemofwatershortageinourcountry.Keywords:DomesticSewage;SequenceBiologyReactor;AdvancedTreatment;ReuseXXXX大学本科毕业设计（论文）--1--目录1.绪论··································································································31.1课题的目的和意义···················································································31.2城市污水处理的现状和发展·····································································31.2.1主要生物处理方法··················································································41.2.1.1接触氧化法··························································································41.2.1.2两段活性污泥法···················································································41.2.1.3序批式活性污泥法··············································································51.2.1.4好氧间歇曝气系统法············································································51.2.1.5循环式活性污泥法················································································61.2.1.6氧化沟法···························································································61.2.1.7厌氧-好氧法·······················································································61.2.1.8好氧生物膜法······················································································71.2.2污水的深度处理方法··············································································71.2.2.1混凝沉淀·····························································································71.2.2.2过滤·······················································································71.2.2.3活性炭吸附··············································································81.2.2.4臭氧氧化技术···········································································81.2.2.5膜技术····················································································81.3工艺流程设计···············································································91.3.1水质参数及流量··········································································91.3.2工艺流程···················································································92处理工艺设计及计算···········································································112.1废水处理设计原则·······································································112.2废水水质水量·············································································112.3构筑物的设计计算·····································································112.3.1格栅的设计·············································································112.3.2沉砂池的设计··········································································122.3.3调节池的设计··········································································132.3.4调节池搅拌器选型······································································142.3.5SBR池的设计·············································································152.3.6中间池的设计·············································································232.3.7过滤器·····················································································232.3.8消毒设计····························································