辽宁省某城市排水工程规划及污水处理厂设计

辽宁省某城市排水工程规划及污水处理厂设计摘要本设计题目为辽宁省某城市排水工程规划及污水处理厂设计。生活污水和工业废水中的污染物质是多种多样的，不能预期只用一种方法就能把所有的污染物质去除干净，一种污水往往需要通过由几种方法组成的处理系统，才能达到处理要求的程度。由于传统活性污泥曝气时间较长，当活性污泥向前推进到曝气池末端时，废水中有机物几乎被耗尽，污泥微生物进入内源代谢期，它的活动能力也相应减弱，因此在沉淀池中容易沉淀，出水中残剩的有机物数量少。处于饥饿状态的污泥回流到曝气池后能够强烈的吸附和氧化有机物，所以传统活性污泥法的BOD和悬浮物去除率都很高，达到90%到95%左右。具体的流程为：污水进入水厂，经过格栅至集水间，由水泵提升到平流沉砂池经，经初沉池沉淀后，大约可去初SS45%,BOD25%.污水进入曝气池中曝气，可从一点进水，采用传统活性污泥法，也可采用多点进水的阶段曝气法。在二次沉淀池中，活性污泥沉淀后，回流至污泥泵房。二沉池出水经加氯处理后，排入水体。关键词：活性污泥法，流程，污泥有机物AbstractThedesignofthesubjectofacityinLiaoningProvinceforthedrainageworksplanninganddesignofsewagetreatmentplants.Domesticsewageandindustrialwastewaterinavarietyofpollutants,cannotbeexpectedtouseonlyonewaywewillbeabletoremoveallpollutants,cleanwaterisoftenaneedforthecompositionofseveralwaysbytheprocessingsysteminordertoachievethedegreeofprocessingrequirements.Aerationactivatedsludgeasaresultofthetraditionaltime,whentheactivatedsludgeaerationtanktomoveforwardtotheend,thewaterwasalmostdepletedinorganicmatter,sludgemicro-organismstoentertheperiodofendogenousmetabolism,anditsactivitydecreasedaccordingly,poolinthesedimenteasilyprecipitateoutofresidualorganicmatterinthewaterasmallnumber.Starvationinthesludgebackintotheaerationtankcanbestrongaftertheadsorptionandoxidationoforganicmatter,sothetraditionalactivatedsludgeremovalrateofBODandsuspendedsolidsarehigh,whichis90%to95%.Specificprocessesfor:sewageintothewaterplant,aftergratingtointer-catchment,fromwaterpumpstothestratospherebythegritchamber,primarysedimentationtankbyprecipitation,abouttogothebeginningofSS45%,BOD25%.Sewageaerationintotheaerationtankcanbealittlewater,usingthetraditionalactivatedsludgeprocess,itcanbemulti-stagewateraerationmethod.Poolinthesecondaryprecipitation,activatedsludgesedimentation,thesludgebacktothepumpingstation.Secondarysedimentationtankwatertreatedbychlorination,intothewaterbody.Keywords:activatedsludge,process,organicsludge目录前言...............................................................11设计任务及原始资料.................................................21.1设计任务......................................................21.1.1设计任务与内容..........................................21.1.2基本要求................................................21.2设计原始资料..................................................51.2.1地形与城市规划资料......................................51.2.2气象资料................................................61.2.3地质资料................................................61.2.4受纳水体水文与水质资料..................................72设计说明............................................................82.1城市管网设计..................................................82.1.1排水体制................................................82.1.2排水系统布置方式的确定..................................92.1.3污水管道系统............................................92.1.4雨水管道系统...........................................113城市污水处理厂设计................................................133.1污水厂选址...................................................133.2污水厂处理规模、处理程度.....................................143.3工艺流程.....................................................143.4工艺总平面布置...............................................164处理构筑物工艺设计................................................174.1污水处理构筑物...............................................174.1.1格栅...................................................174.1.2污水泵房...............................................174.1.3平流沉砂池.............................................184.1.4初次沉淀池.............................................184.1.5曝气池.................................................194.1.6二次沉淀池.............................................204.1.7鼓风机房、加氯间.......................................204.1.8计量堰设计计算.........................................214.2污泥处理构筑物...............................................214.2.1浓缩池.................................................214.2.2污泥贮存池.............................................224.2.3消化污泥控制室.........................................224.2.4消化池.................................................234.2.5脱水机房...............................................234.2.6沼气罐.................................................234.3厂内给水排水及道路...........................................244.4辅助建筑物...................................................245设计计算..........................................................255.1一级处理.....................................................255.1.1隔栅...................................................255.1.2沉砂池.................................................285.1.3初沉池.................................................305.2二级处理——活性污泥法.......................................335.2.1曝气池.................................................335.2.2辐流式二次沉淀池.......................................425.2.3计量堰.................................................445.3污泥处理构筑物...............................................445.3.1浓缩池.................................................446技术经济分析......................................................696.1国内外情况...................................................696.2水厂工程造价................