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1、摘要水产品加工废水具有有机物浓度高，含有蛋白质、油脂等大分子有机物质多的特点。废水排放的季节性较强，水质水量波动也较大。具有水温低，生化降解速率慢的特点。并且若是进行海产品加工，含盐废水的排放会造成十分严重的环境污染，也会严重干扰城市污水处理厂的正常运行。本课题选用水解—CASS的工艺处理此废水。因为水产品加工废水具有季节性、水质/水量波动较大等特点，而CASS工艺耐冲击负荷能力强，并且对有机物的去除率高的同时还能同步进行脱氮除磷，出水水质好，污泥产量低。对于企业来说，CASS工艺的占地面积少，建设费用低（可省去初沉池、二沉池），污
2、水处理设备的数量较少，控制系统比较简单，而工艺本身决定了不发生污泥膨胀，所以系统的管理简单，运行可靠。在整个工艺流程中，在CASS池前设置一个隔油池以及一个水解酸化池。隔油池将流进的废水中的大量浮油除去，废水再流入水解酸化池中通过水解作用使水中的大分子有机物分解成小分子有机物以提高污水的可生化性，为后面的CASS池减轻负荷并且有利于CASS池降解大量有机物和提高CASS池脱氮除磷的功能。关键词：水产品加工废水；水解酸化；CASS工艺IVAbstractThecharacteristicsofaquaticproductsproces
3、singwastewaterwerehighconcentrationoforganicmatter,containingproteins,lipidsandalargenumberofmacromolecularorganicmatters.Thequalityandquantityofwastewaterdischargewasvariedwithdifferentseasons,alsothebiochemicaldegradationratewaslowwithlowwatertemperature.Besides,thee
4、missionofsalinitywastewaterwouldleadgreatenvironmentalpollutionwithseafoodprocessing.Itcouldseriouslyinterferewiththenormaloperationofurbansewagetreatmentplants,too.Thisprocessofhydrolysis-CASSwasusedinthisprojectintendstodealwiththiswastewateraccordingtothecharacteris
5、ticsabove.Asstrongresistancetoshockloadingcapacity,theprocessofhydrolysis-CASSwashighremovalrate,alsosimultaneouslynitrogenandphosphorusremoval,betterdischarge,andlowsludgeproduction.Forenterprises,theprocessneededlesseartharea,lowconstructioncost(eliminatingprimarysed
6、imentationtank,secondarysettlingtank),andfewsewagetreatmentequipments.Alsothecontrolsystemwasrelativelysimple,nosludgebulking,andthemanagementofthesystemwassimpleandreliable.Inthewholeprocess,agreasetrapandapoolacidhydrolysispoolwassetupbeforethewaterflowingtotheCASSpo
7、ol.Alargenumberofoilslickscouldberemovedinthegreasetraps.Then,thewastewaterflowedintoacidhydrolysispoolandmuchoftheorganicmoleculewasbrokendownintosmallorganicmoleculesbyhydrolysis.ToimprovethebiodegradabilityofthesewageandreducingtheloadofthefollowingCASSpool.Theycoul
8、dimprovetheCASSpoolofnitrogenandphosphorusremoval.Keywords:Aquaticproductsprocessingwastewater;Hydrolysisandacidifica
