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黑龙江大学本科生毕业论文论文题目：辽宁省锦州市凌河区污水处理厂设计学院：化学化工与材料学院年级：2004级专业：环境科学姓名：徐厚伟学号：20040830指导教师：朱琦2008年5月28日i摘要水是不可替代的自然资源，在经济建设﹑社会发展和人民生活占有及其重要的地位。随着经济建设﹑城乡建设的发展和人口的增加，用水持续增长，水的供需矛盾日益突出。由于大量的工业废水和生活污水排入水体，使水环境受到严重的`污染，水资源短缺和水质恶化已成为制约经济建设和城乡发展、破坏生态环境、影响人民生活和自身健康的突出问题。建设节约型社会，促进可持续发展，这是辽宁省“十一五”规划编制的重点工作之一。加快恢复辽西植被，提高全省森林覆盖率。深化工业污染防治，加强水污染和大气污染的整治，确保让广大人民群众喝上干净水、呼吸上清洁空气。锦州市凌河区在规划编制中，提到了城区绿化覆盖率达到40%；城市生活垃圾无害化处理率和污水集中处理率分别达到100%和70%。因此本设计根据凌河区的污水水质水量，水文条件，气象人文等信息以及经济等情况决定以CASS法为主要处理单元的方案。力求在处理达标的前提下做到最经济。关键词污水处理厂；污水集中处理率；污水水质水量；CASS法iiAbstractWateristhenaturalresourcewhichcan’tbesubstituted,Itisintheveryimportantstatusintheconstructionofeconomy、thedevelopmentofsocietyandthelifeofpeople.Withthedevelopmentofconstrctionofeconomy、theconstructionofcontrysideandtheincreaseofpopulation,thewaterusedgrowscontinually,thecontradictoryofsupplyanddemandofwaterisprominentdaybyday.Asalotofindustrialwastewaterandsanitarysewagedisperseintowater,thewaterenvironmentwaspollutedseriously.theshortofthewaterresourceandtheworseofthewaterqualityhasrestrictedthedevelopmentofcityandthedevelopmentofcountryside,thedestructionofecologicalenvironment,whichaffectthelivesofthepeopleandtheprominentquestionofthehealthofourselies.Constructingthesavesociety,promotingthesustainabledevelopment,thisisthekeyworkintheplanofelevenfiveofLiaoningProvince.promoterestoresthevegetationofLiaoxi,deepenedthepreventingandcontrollingoftheindustrypollution,putthewaterpollutionandtheairpollutionundercontrol.makesurethatmanypeoplecandrinkcleanwater,breaththecleanair.Intheplanofthedistrictoflingheofjinzhou,mentionedthecityafforestationcoveragefractionachieves40%,Thelifetrashofthecitydetoxificationprocessingratioandthesewagecentralismprocessingratioachieves100%and70%.Somydesignactsaccordtothewastewaterwaterqualityandwatervolume,hydrologycondition,meteorologicalhumanitiesetc.IdecidedtousetheprojectthattakeCASSprocessasthemainprocessingunit.Iwilltakeallmyefforttomakeiteconomicalundermeetingthestandardofprocessing.Keywordssewagecentralismprocessingratio;CASSprocess;wastewaterwaterqualityandwatervolume;wastewatertreatmentplant目录摘要.......................................................................................................................................ⅰABSTRACT.................................................................................................................................ⅱ第一章前言...........................................................................................................................11.1设计背景..........................................................................................................................11.2设计资料..........................................................................................................................11.3自然状况..........................................................................................................................21.4污水目前情况..................................................................................................................21.4.1人口密度及居住生活污水量...................................................................................21.4.2工业企业与公共建筑的排水量和水质资料...........................................................21.4.3受纳水体为河流，污水处理厂排放口处资料.......................................................31.5设计内容.........................................................................................................................31.6厂址的选择.....................................................................................................................3第二章设计水量与处理程度...............................................................................................52.1设计污水量的计算.........................................................................................................52.1.1设计人口数的计算..................................................................................................52.1.2污水量的计算..........................................................................................................52.2进水水质与处理程度的计算.........................................................................................62.2.1进水水质的确定.......................................................................................................62.2.2处理程度的计算.......................................................................................................6第三章污水处理方式的比较与确定...................................................................................113.1污水处理方案的提出....................................................................................................113.1.1方案一：AB法...................................................................................................113.1.2方案二：CASS法...............................................................................................113.1.3方案三：A2/O法...................................................................................................123.2污水处理方案的比较...................................................................................................123.3污水处理流程图........