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1、广东工业大学环境工程专业毕业设计设计说明设计说明近年来，我国的啤酒产业迅速发展，每年啤酒废水的排放量近4×108t，占我国废水排放总量的1％，每年啤酒废水中向环境排放的COD总量约为45×l04t，约占COD排放总量的3.2％。啤酒生产废水中的主要污染物为糖类、醇类、多种维生索、酵母菌、纤维索、氨基酸、酒糟等有机物，其COD和SS浓度均较高，且各工序排出的废水水质有很大差异，其中以糖化废水浓度最高。虽然无毒，但易于腐败，排入水体要消耗大量的溶解氧，对水体环境造成严重危害。由于啤酒废水含有大量的有机物，具有很好的可生化性，因而适合以生物处理为主的处理工理工艺。本例采取厌氧+
2、好氧相结合的处理新工艺，将UASB反应器和CASS反应器结合起来对啤酒废水进行处理。UASB反应器是目前应用较为广泛的高速厌氧反应器，适合处理高浓度有机废水，具有构造简单、不易堵塞、耐冲击负荷、便于操作等优点。CASS是在好氧生物处理中常用的活性污泥法SBR工艺的基础上发展起来的，具有运行费用省、运行灵活、管理方便等优点。该工艺非常适合啤酒废水的处理，出水可达到《污水综合排放标准》（GB8978-96）一级排放标准和《水污染物排放限值》（DB44/26—2001）。关键词：啤酒废水,生物处理,UASB,CASS3广东工业大学环境工程专业毕业设计设计说明Designspec
3、ificationInrecentyears,thebeerindustryisdevelopingrapidly.Theannualamountofthebeerwastewaterisnearly4×108t.,accountfor1%intheamountofthewastewaterinourcountry.Annually,theamountofCODisnearly45×l04tfromthebeerwastewater,accountfor3.2%inthetotalamount.Themainpollutantsinbeerwastewaterconsis
4、tofsugars,ethanol,vitamin，yeast，cellulose，aminophenol，etc.TheirCODandSSarerelativelyhighindensity,andthequalityofthewastewaterthateveryprocessdischargehasverygreatdifferences,amongthemthehighestindensitywiththesaccharificationwastewater.Thoughthesematerialsarenonpoisonous,theywillcorrupte
5、asily,whenenteringthewaterwouldconsumealargeamountofoxygen,endangertheenvironmentofwaterseriously.Becausethebeerwastewatercontainsalargeamountoforganicmatter,andhaveverygoodbiodegradableability,it’ssuitableforthetreatmentincarryingoutabiologicaldisposalcraft.Intheexample,theprocessofcombi
6、ninganaerobicpre-treatmentwithaerobicpost-treatmentisadopted,whichcombinesUASBreactorandCASSreactortotreatwiththebeerwastewater.UASBreactorisaanaerobicreactoratahighspeedatpresentwhichusesextensively.Itissuitablefordealingwiththeorganicwastewaterofhighconcentration.Itsadvantagesisfollowin
7、gas:simplestructure,difficulttostopup,highloading,easytooperate,etc.CASSisdevelopedonthebasisofSBRcraftwhichisactivatedsludgeprocessthatusedcommonlyinanaerobicbiologicaldisposal.Ithastheadvantagesoflowoperateexpenses,operatingflexibly,managingeasily,etc.Thiscraftisv
