毕业设计《城市污水处理厂初步设计(完全混合流态生物工艺)》

I毕业设计相关材料题目:城市污水处理厂初步设计（完全混合流态生物工艺）院(系)：化工与环境工程学院专业：环境工程学生：班级：环境07-1毕业设计相关材料清单序号材料名称份数1毕业设计选题表12毕业设计开题报告13毕业设计外文资料翻译14毕业设计小组答辩记录15毕业设计成绩考核表1广东石油化工学院毕业设计：城市污水处理厂初步设计（完全混合流态生物工艺）II摘要当今，随着经济的快速发展，人民生活水平的不断提高，环境污染日趋严重，加大城市生活污水治理力度势在必行。现拟建一座城市生活污水处理厂，处理规模为100000m3/d。进水水质为CODCr：250mg/L，BOD5：150mg/L，SS：200mg/L，NH3-N：40mg/L，NO3-N：10mg/L，pH=7.0~8.5,出水水质为CODCr≤100mg/L，BOD5≤30mg/L，SS≤30mg/L，NH3-N≤25mg/L，pH=6~9。根据进出水水质，本设计拟采用完全混合液态的生物工艺，经比选，确定采用周期循环曝气活性污泥（CASS）工艺。CASS工艺污水呈完全混合液态，对进水水质、水量、PH和有毒有害物质起到较好的缓冲作用，具有较强的耐冲击负荷能力，同时对丝状菌的生长起到抑制作用，可有效防止污泥膨胀。此工艺具有投资省，处理效果好，运行管理方便等优点，适用于大中型污水处理厂使用。本设计包含污水处理工艺流程的确定，工艺流程中各单元的计算，图纸的绘制等。本工程的实施将显著改善受纳水体水质，同时间接产生经济效益，促进经济可持续发展。关键词：污水处理厂；完全混合；CASS工艺IIIAbstractNowadays,withrapideconomicdevelopment,improvelivingstandards,environmentalpollutionisworsening,andincreaseeffortstomunicipalsewagetreatmentisimperative.Nowproposedacitysewagetreatmentplantfortreatingscale100000m3/d.TheramwaterqualityisCODCr,BOD5,SS,NH3-N,NO3-N,andpHkeepat250mg/L,150mg/L,200mg/L,40mg/L,10mg/L,and7.0~8.5,respectively.ThetreatedwaterqualityisCODCr,BOD5,SS,NH3-N,NO3-N,andpHkeepat100mg/L,30mg/L,30mg/L,25mg/L,antpH6~9,respectively.Accordingtothetreatedwaterquality,thedesignplanstousethecompletelymixedbiotechnology,bycomparison,determinetouseofcyclicactivatedsludgesystem(CASS)process.sawageofCASSprocessiscompletelymixed,onwaterquality,waterquantity,PH,toxicandhazardoussubstanceshavebufferroleeffect,withastrongresistancetoshockloadingcapacity,meanwhilegrowthoffilamentousbacteriaisbeinhibitiontobepreventsludgebulking.ThisprocesshastheadvantageofgoodLessinvestment,goodeffect,easyoperationandmanagement.Applicabletolargeormediumsizedsewagetreatmentplants.Thedesignincludesthedeterminationofsewagetreatmentprocess,processinthecalculationofeachunitanddrawingtheconstructiondrawings.Theimplementationofthisprojectwillsignificantlyimprovethewaterqualityofreceivingwater,andindirecteconomicbenefitsandpromotesustainableeconomicdevelopment.Keyword:sewagetreatmentplants;CompletelyMixing;CASSprocess广东石油化工学院毕业设计：城市污水处理厂初步设计（完全混合流态生物工艺）IV目录摘要..............................................................................................................................................................IAbstract.........................................................................................................................................................III目录...........................................................................................................................................................IV第一章前言.......................................................................................................................................11.1设计的目的及意义..........................................................................................................................11.2设计指导思想..................................................................................................................................11.3设计的内容及要求...........................................................................................................................11.3.1主要内容................................................................................................................................11.3.2要求........................................................................................................................................21.4国内外发展概况..............................................................................................................................21.5设计依据及原则..............................................................................................................................21.5.1设计依据.............................................................................................................................21.5.2设计原则.............................................................................................................................31.6设计原始资料...................................................................................................................................31.6.1设计规模.............................................................................................................................31.6.2水质指标.............................................................................................................................31.6.3气象资料................................................................................................................................31.6.4污水排水接纳河流资料........................................................................................................31.6.5厂址及场地现状....................................................................................................................3第二章污水处理厂工艺方案的选择.....................................................................................................42.1设计方案论证...................................................................................................................................42.2.1活性污泥法处理系统有效运行的基本条件是：.......................