cast工艺设计说明书

安徽工业大学毕业设计第i页摘要小区生活污水的处理近年来越来越受到重视。小区污水的特点是可生化性好，适合采用生物处理的方法如：活性污泥法、生物膜法等。CAST有很多的优点，例如CAST工艺运行稳定，对有机物的去除效果好，抗冲击负荷能力强，产泥量小，不发生污泥膨胀，反应推动力大，能在低温环境中长期运行，并保持高的处理效率。与其他二级处理相比CAST工艺投资少、运行费用低、管理方便。根据设计任务，本设计选用CAST做为小区生活污水的处理工艺，具有投资少，运行费用低，自动化程度高，噪音小的特点，并且处理水质能达到国家规定的排放标准。本设计说明书重点说明了CAST工艺在处理小区生活污水时所采用的运行参数、设计的计算方法和过程，以及一些常用水处理构筑物的设计计算方法，通过设计能达到预期的处理效果。关键词小区生活污水活性污泥法CAST负荷安徽工业大学毕业设计第ii页ABSTRACTTheprocessingofthewastewaterofbiotopeissubjectedtovaluemoreandmoreinrecentyears.Thecharacteristicofbiotopewastewaterisgoodforbio-chemical.Adoptionthebiologicaltreatment,suchas:theactivatedsludgeprocessing,theslimeprocessetc.TheCyclicactivatedsludgetechnologyhasmanyadvantages,forexample:Cyclicactivatedsludgetechnologycanworksteadilyandremovalorganicmattereffectly,Cyclicactivatedsludgetechnologyhasexcellentabilityofbearinghighimpactloads,theamountofsludgeissmall,nosludgeswell,thereactionimpulsesislarger,Cyclicactivatedsludgetechnologyalsocanworkatlowtemperatures,andkeephighratetoremoval.Comparingwiththesecondarytreatmentprocess,thecostsofconstructionandoperationofCyclicactivatedsludgetechnologyismuchlower，operationissimply.Accordingtodesignmission,thisdesignchoosesCyclicactivatedsludgetechnologytotreatmentthewastewaterofbiotope,lowinvestment,lowexpensesofoperation,automatedegreehigh,noisesmall,andthequalityofeffluentcanattainthenationstandard.TheemphasisofthisdesignisexplainedCyclicactivatedsludgetechnology’stheoperationparameter,calculationmethodandprocessofdesignwhiletreatthewastewaterofbiotope,andsomecalculationmethodofdesignofconstructincommonwastewatertreatmentprocessing,thedesignoftheCyclicactivatedsludgetechnologycanattainexpectationofprocessingresult.KEYWORDSBiotopewastewater,activatedsludgeprocessing,Cyclicactivatedsludgetechnology,load安徽工业大学毕业设计第III页目录摘要....................................................................................................................................................iABSTRACT......................................................................................................................................ii前言...................................................................................................................................................11.文献综述...................................................................................................................................21.1.现阶段我国水资源状况...............................................................................................21.2.小区生活污水的定义来源及特征...............................................................................21.2.1.定义......................................................................................................................21.2.2.来源......................................................................................................................21.2.3.特征......................................................................................................................21.3.现阶段国内外生活污水处理工艺...............................................................................31.3.1.A/O工艺..............................................................................................................31.3.2.A/B工艺...............................................................................................................31.3.3.SBR工艺..............................................................................................................41.3.4.氧化沟工艺..........................................................................................................91.3.5.生物膜.................................................................................................................111.3.6.厌氧工艺............................................................................................................132.小区生活处理工艺方案.........................................................................................................142.1.处理要求.....................................................................................................................142.1.1.水质情况............................................................................................................142.1.2.处理程度计算....................................................................................................142.2.小区生活污水处理的原则.........................................................................................152.3.小区生活污水处理应注意的问题.............................................................................152.4.生活污水处理的典型工艺流程.................................................................................152.5.确定方案.....................................................................................................................162.5.1.确定工艺流程....................................................................................................162.5.2.提出方案............................................................................................................182.5.3.方案比较............................................................................