(整理)污水处理毕业设计

精品文档精品文档目录摘要Abstract一、概述..........................................................................................................11.1工程概况.....................................................................................11.2设计依据.....................................................................................11.3设计任务和范围.........................................................................2二、工艺流程的选择......................................................................................32.1原水水量与水质和处理要求.....................................................32.1.1原水水量与水质...............................................................32.1.2处理要求...........................................................................32.2处理工艺的比较和选择..............................................................32.2.1生物膜法...........................................................................32.2.2活性污泥法.......................................................................42.3流程的拟定.................................................................................6二、工艺设计计算..........................................................................................83.1设计参数说明.............................................................................83.2构筑物尺寸确定.........................................................................8精品文档精品文档3.2.1粗格栅...............................................................................83.2.2泵房.................................................................................103.2.3细格栅.............................................................................113.2.4平流沉砂池.....................................................................133.2.5初沉池.............................................................................143.2.6A/O生物池......................................................................183.2.7二沉池.............................................................................293.2.8污泥浓缩池.....................................................................333.2.9加氯接触池.....................................................................343.2.10贮泥池...........................................................................363.2.11脱水机房.......................................................................36四、厂区的平面布置....................................................................................384.1平面布置...................................................................................384.2主要构建物一览表...................................................................39五、环境效益................................................................................................41精品文档精品文档摘要本设计的主要内容为盖州市污水处理工程设计。城市排水体制采用分流制排水系统。雨水分三个区域就近排入城市附近河流。城市污水经城市污水管网转输后经截流干管输送至城市污水厂统一处理后排入河流。根据盖州市总体规划，将盖州市城区的城市污水截流，沿大清河铺设截流干管，由东向西至哈大铁路西侧（沈大高速公路东），在截流干管末端、大清河北岸建污水处理厂。经现场踏勘，将污水处理厂厂址一选择在哈大铁路以西1.1公里，西海乡詹家屯西南方向的大清河老堤堤外，地面高程平均为4.80米。设计进水水质为COD≤350mg/L；BOD5≤180mg/L；SS≤200mg/L；石油类≤10mg/L；NH3-N≤25mg/L。出水水质：COD≤100mg/L；BOD5≤30mg/L；SS≤30mg/L；石油类≤5mg/L；NH3-N≤25mg/L。进出水水质及去除率可知，盖州市污水处理厂主要以去除有机物、氨氮、磷为主。污水处理厂出水水质优于农田灌溉水质，可以用于灌溉。污水厂采用A/O工艺，污水进入污水厂后，先经过粗格栅后由污水泵站提升，而后先后经过细格栅、辐流沉砂池、初沉池、A/O生化池、二沉池，最后消毒后排入受纳水体。设计出水水质，COD、BOD5、SS、NH3-N、石油类等主要指标达到《城镇污水处理厂污染物排放标准》（GB18918-2002）二级标准。根据污水处理厂出水水质的设计要求,处理工艺对BOD5、SS、N、P均须有效的去除，因此,本污水处理厂的污水处理工艺应具有除磷脱氮功能。原污水能否采用生化处理,特别是原污水水质能否适用于生物除磷脱氮工艺,取决于原污水中各种营养成分的含量及其比例能否满足生物生长的需要,因此首先应判断相关的指标能否满足要求。精品文档精品文档A/O工艺生物脱氮的基本原理是在传统的二级处理中将有机氮转化为氨氮的基础上，通过硝化和反硝化菌的作用，将氨氮转化成亚硝态氮，硝态氮，再通过反硝化作用将硝态氮转化为氮气，从而达到从废水中脱氮的目的。关键词：水污染；A/O工艺法；污染超标；河道治理精品文档精品文档AbstractThedesignofthemaincontentforthegaizhoucitysewagedisposalengineeringdesign.Urbandrainagesystemadoptstapsystemdrainagesystem.Therainwaterdischargedintothreeregionsnearbycitynearbyrivers.Urbansewageiscitysewagepipenetworkafterinterceptingmainpipesturnlosetransportedtotheurbansewageplantunifiedhandlingbackintorivers.Accordingtotheoverallplanning,willgaizhoucityurbangaizhoucityalongtheurbansewageclosure,interceptingmains,bigqinghelaidbyeasttowesttohaerbin-dalianrailwaywestside(shenyang-dalianhighwayeast),ininterceptingmainpipesnorthend,bigqinghebuildingwastewatertreatmentplant.Thefieldofsewageplantsitetoreconnoiter,aselectioninhaerbin-dalianrailway1.1kilometerswestofwesternZhanGuTunsouthwestdirection,thebigtownshipoutsideofqingheolddike,groundelevationaveragefor4.80mjump.Designtheincomingwater350mg/LforCODacuities;BOD5180mg/L;morethanSSacuities200mg/L;Petroleum10mg/L;morethanNH3-Nmorethan25mg/LN.Effluentis:COD100mg/L;morethanBOD530mg/L;morethanSSacuities30mg/L;Petroleumacuities5mg/L;NH3-Nmorethan25mg/LN.Inletandoutletwaterwaterqualityandremovalrateknowable,gaizhoucitysewagetreatmentplantmainlyremovalorganic,ammonianitrogen,phosphorusprimarily.Sewageeffluentissuperiortotheirrigationwaterquality,canbeusedforirrigation.WastewatertreatmentplantadoptsA/Oprocess,sewage精品文档精品文档intowastewatertreatmentplant,afterbysewagepumpingstationaftercoarsegrilleandthensuccessivelythroughascensionoffinegrille,hydrocyclonesinkingsandpool,initialpond,A/Obiochemicalpool,thesecondpond,f