华北理工大学轻工学院QingGongCollegeNorthChinaUniversityofScienceandTechnology毕业设计说明书设计题目：20万m3/d生活污水氧化沟处理工艺设计学生姓名：邱光兆学号：201224040113专业班级：12环境工程1班学部：材料化工部指导教师：李娟娟2016年5月15日I摘要本次毕业设计的题目为某污水处理厂设计——氧化沟工艺。主要任务是工艺流程选择及构筑物设计和计算。本污水处理厂主体处理系统分为两个部分污水处理系统和污泥处理系统，污水处理系统包括：格栅、污水提升泵站、曝气沉砂池、鼓风机房、配水井、氧化沟、接触消毒池与加氯间。污泥处理系统包括：污泥浓缩池、污泥脱水机房。污水处理工艺流程为污水先到粗格栅，通过污水提升泵到细格栅，再到曝气沉砂池通过配水井到三槽式氧化沟，通过接触消毒池后出水。污泥处理工艺流程为：氧化沟中的污泥到达浓缩池经脱水机房，最后泥外运。设计进水水质为：BOD5=260mg/L，COD=400mg/L，SS=380mg/L，TN=50mg/L，TP=8mg/L；设计出水水质为：BOD5≤30mg/L，COD≤100mg/L，SS≤30mg/L，TN≤25mg/L，TP≤3.0mg/L，即污水处理厂出水水质要求达到国家《污水综合排放标准（GB8978-2002）》中二级标准。关键词：三槽式氧化沟；生活污水；污泥处理IIIIIAbstractThegraduationdesigntopicforasewagetreatmentplantdesign-oxidationditchprocess.Maintaskistoprocessselectionandstructuredesignandcalculation.Thissewagetreatmentplantmainprocessingsystemisdividedintotwopartsofthesewagetreatmentsystemandsludgetreatmentsystem,sewagetreatmentsysteminclude:grille,sewagepumpingstation,aeratedgritchamber,blowerroom,matchwell,oxidationditch,thecontactbetweenchlorinedisinfectionpool.Sludgetreatmentsystemsinclude:thesludgethickenerandsludgedewateringmachineroom.Wastewatertreatmentprocessforwastewatertocoarsegrid,firstbysewageliftpumptofinescreen,andthentoaeratedgritchamberthroughtheWellstothreeslottypeoxidationditch,throughcontactdisinfectionafterthepoolwater.Inthesludgetreatmentprocessis:theoxidationditcharrivesludgethickenerdewateringmachineroom,finallysinotransmud.Designthewaterqualityis:theBOD=260mg/L,COD=400mg/L,SS=380mg/L,TN=50mg/L,TP=8mg/L;Designfordischargingwater,BOD30mg/L,orlessCODacuitieswere100mg/L,SS30mg/L,orlessTNacuitieswere25mg/L,TP3.0mg/Lorless,thesewagetreatmentplanteffluentwaterqualityrequirementsmeetthenational"integratedwastewaterdischargestandard(GB8978-2002)"inthesecondarystandard.Keywords:threeslotoxidationditch;Wastewater;Sludgetreatment.IV目录摘要...............................................................................................................................................IAbstract............................................................................................................................................II引言..................................................................................................................................................11概述...............................................................................................................................................21.1设计任务和依据.................................................................................................................21.2设计要求.............................................................................................................................21.3设计参数.............................................................................................................................32生活污水处理工艺比较与确定..............................................................................
