南京林业大学本科毕业设计（论文）提供全套毕业论文，欢迎咨询本科毕业设计(论文)题目:2000吨/天食品废水处理厂的设计学院:化学工程学院专业:环境工程班级:1002051学号:100205117学生姓名：指导教师:职称:讲师二○一四年5月23日摘要UASB-CASS工艺全称为厌养好氧二级处理活性污泥法，即污水通过调节池、沉砂池进入UASB反应池，在厌氧状态下产生的沼气，与污泥碰撞引起附着气泡的污泥絮脱气，污泥颗粒将沉淀到污泥床的表面。出水进入CASS池实行连续进水、静态沉淀和间歇排水，对污染物质降解经历着“好氧—缺氧—厌氧”交替运行的过程，加之采用延时曝气与生物选择，有效地促进了难降解有机物的好氧生化。在本次工艺中COD、BOD、SS的去除率达到：99%、99%、97%，出水达到国家二级标准。工艺由于投资和运行费用低、处理性能高，尤其是优异的脱磷除氮功能而越来越受到重视。该工艺已在酒厂含油废水、食品废水、屠宰废水中得到广泛应用，尤其适用于工业污水和生活污水的处理。关键词工业污水，UASB-CASS工艺，工艺设计AbstractUASB-CASSTechnologycalledtheAerobicdisgustCustodyof2handleActivatedSludgeProcess,ThatByregulatingsewageintoaprecipitationtankandtwoUASBreactorpool,Anaerobicconditionsinthegas,Sludgecausedbycollisionwithbubblesattachedsludgeflocdegassing,Sludgeparticlesofsludgebedsedimentstothesurface.CASSpoolwaterenteredtheintroductionofthecontinuousinflow,Staticprecipitatorsandintermittentdrainage,Degradationofpollutantsexperiencing"aerobic-anoxic-anaerobic"alternativeprocess,Moreover,usingaerationandbiologicaldelaychoiceEffectivelypromotingtherefractoryorganicsaerobicbiochemical.InthisprocessofCOD,BOD,SSremovalrate:99%,99%,97%.Thewaterreachthestatestandardsoftwo.Technologyinvestmentandoperatingcostslow,Performancesuperbhandling,ParticularlyoutstandingPhosphorusandnitrogenfunctionalandmoreimportance.Theprocesshasbeeninthedistilleryoilywastewater,foodwastewater,wastewaterslaughteringbeenwidelyapplied,particularlyapplicabletotheindustrialeffluentsandsewagedisposal.KeywordsIndustrialsewage,UASB-CASStechnology,processdesign目录TOC\o"1-3"\u前言PAGEREF_Toc3094611设计说明PAGEREF_Toc3227321.1设计规模与设计流量PAGEREF_Toc2036321.1.1食品污水处理厂的设计流量PAGEREF_Toc377221.1.2食品污水处理厂的设计规模PAGEREF_Toc2924421.1.3污水处理程序PAGEREF_Toc2884521.2污水处理厂工艺流程比选PAGEREF_Toc562731.2.1工艺流程方案选择考虑因素PAGEREF_Toc1276931.2.2工艺方案的分析及比较PAGEREF_Toc3155941.2.3工艺流程的确定PAGEREF_Toc3158461.2.4处理工艺流程简图PAGEREF_Toc2849961.3.处理单元构筑物说明PAGEREF_Toc1843871.3.1格栅PAGEREF_Toc238687