中低浓度印染废水处理工程设计及效果分析

中低浓度印染废水处理工程设计及效果分析ProjectDesignandEffectAnalysisforTreatmentofMid-lowConcentrationPrintingandDyeingWastewaterZHANGJian(FujianHuaqiaoUniversityEnvironmentalProtectionEngineeringCo.,Ltd.,Quanzhou362021,China)Abstract：AccordingtothecharacteristicsoftheprintinganddyeingwastewaterfromafabriccompanyinWujiangcity,Jiangsuprovince,theprocessofflotation+CASS+clarification+sandfilterisintroduced.Theresultsshowthat,theeffluentofCASScanmeetthedischargestandardandtheremovalefficiencyofCODisupto85%andmore,theeffluentbythefurthertreatmentofclarificationandsandfiltercanbereusedintheproduction.Theprocesshasthecharacteristicsoflowprojectinvestment,operationcostandstableoperationeffectandprovidesapromisingprocessforthetreatmentofthemid-lowprintinganddyeingwastewater.Keywords：Printinganddyeingwastewater；Flotation；CASS；Projectdesign中低浓度印染废水处理工程设计及效果分析张建(福建华大环保工程有限公司，福建泉州362021)摘要：根据江苏省吴江市某印染有限公司印染废水的特点，采用“气浮＋CASS＋澄清+砂滤”的工艺对其进行处理。运行结果表明，CASS池出水可稳定达标，CODCr去除率可达85％以上，经澄清、砂滤物化深度处理后的水可回用于生产。工程投资和运行费用较低，运行效果稳定，为