环境工程毕业设计说明书

北京理工大学毕业论文（设计）题目：250000m3/d城市污水处理厂设计姓名：学院：专业：班级：学号：2015年6月10日毕业论文（设计）诚信声明本人声明：所呈交的毕业论文（设计）是在导师指导下进行的研究工作及取得的研究成果，论文中引用他人的文献、数据、图表、资料均已作明确标注，论文中的结论和成果为本人独立完成，真实可靠，不包含他人成果及已获得北京理工大学或其他教育机构的学位或证书使用过的材料。与我一同工作的同志对本研究所做的任何贡献均已在论文中作了明确的说明并表示了谢意。论文（设计）作者签名：日期：年月日毕业论文（设计）版权使用授权书本毕业论文（设计）作者同意学校保留并向国家有关部门或机构送交论文（设计）的复印件和电子版，允许论文（设计）被查阅和借阅。本人授权北京理工大学可以将本毕业论文（设计）全部或部分内容编入有关数据库进行检索，可以采用影印、缩印或扫描等复制手段保存和汇编本毕业论文（设计）。本人离校后发表或使用该毕业论文（设计）或与该论文（设计）直接相关的学术论文或成果时，单位署名为北京理工大学。论文（设计）作者签名：日期：年月日指导教师签名：日期：年月日I目录中文摘要..................................................................................................................................IIAbstract....................................................................................................................................III1.设计概述................................................................................................................................11.1设计任务.............................................................................................................................11.2设计资料.............................................................................................................................11.3设计依据.............................................................................................................................22.污水处理选择........................................................................................................................22.1处理工艺流程的比较与确定.............................................................................................23.基础构筑物计算....................................................................................................................43.1中格栅.................................................................................................................................53.2污水提升泵房计算.............................................................................................................93.3细格栅的计算...................................................................................................................103.4平流式沉砂池..................................................................................................................143.5CASS生物反应池............................................................................................................173.6鼓风机房计算...................................................................................................................223.7污泥浓缩池.......................................................................................................................233.8滤布滤池...........................................................................................................................293.9紫外线消毒池...................................................................................................................294.污水厂总体布置..................................................................................................................304.1平面布置...........................................................................................................................304.2高程布置...........................................................................................................................305.工程造价及预算................................................................................................................316.结论......................................................................................................................................34致谢.........................................................................................................................................36参考文献.................................................................................................................................35II250000m3/d城市污水处理厂设计环境工程专业指导教师摘要：本设计要求污水处理厂的日处理能力为250000m3/d。进水水质CODcr300mg/L，BOD5280mg/L，SS200mg/L，总氮38mg/L，总磷8.2mg/L。出水水质达到《城镇污水处理厂污染物排放标准》中的要求的水污染物排放一级B标准，该污水厂的出水直接排入厂区外部的河流，其最高洪水位为2m。根据设计材料中污水的日需处理污水量，排水的水质要求和污水中污染物含量特性，经比较分析选用符合实际的污水处理的处理工艺。本设计采用的是经过SBR改良得到的新型污水处理工艺CASS处理工艺。此污水处理厂设计的主要污水处理构筑物有，中细格栅、调节池、CASS反应池、污泥浓缩池和泵房等。关键词：CASS工艺；污水处理；脱氮除磷；污泥浓缩III250000m3/dmunicipalwastewatertreatmentplantdesignStudentmajoringinEnvironmentalEngineeringMengZhenTutorChenXiangAbstract：Thedesignofthesewagetreatmentplant,thedailyprocessingcapacityof250000m3/d.InfluentwaterqualityBOD5280mg/L,CODcr300mg/L,SS200mg/L,totalnitrogen38mg/L,totalphosphorus8.2mg/L.EffluentqualitytoachieveurbansewagetreatmentplantpollutantdischargestandardrequirementsofwaterpollutantemissionslevelBstandard,riversofthesewagetreatmentplanteffluentdischargeddirectlyintothefactoryoutside,thehighestfloodis2m.Accordingtothesewagetreatmentinthedesignofthedailysewagecapacity,thesewagequalityrequirementsandthesewagepollutantcontent,thecomparisonandanalysisofthesewagetreatmentprocess.ThisdesignusesthenewwastewatertreatmenttechnologyCASSprocess,whichisobtainedbySBR.Thesewagetreatmentplantdesignofthemainsewagetreatmentconstructionmaterial,thefinegrid,regulationpool,CASSreactor,sludgethickeningt