剩余污泥减量化工艺条件优化研究_刘永德

第4卷第11期环境工程学报Vol.4,No.112010年11月ChineseJournalofEnvironmentalEngineeringNov.2010剩余污泥减量化工艺条件优化研究刘永德1董燕1赵继红1,2＊刘峻3王翔3王永华4刘杨5(1.河南工业大学化学化工学院,郑州450001;2.郑州轻工业学院,郑州450002;3.河南省正大环境科技咨询工程有限公司,郑州450002;4.惠生工程(中国)有限公司河南化工设计院分公司,郑州450000;5.郑州市污水净化有限公司,郑州450000)摘要运用超声处理连续流活性污泥系统中不同种类的污泥,并将其回流至原系统中,研究其剩余污泥减量化效果。按正交实验设计并进行试验,确定最优工艺条件。结果表明:当声能密度为0.6W/mL,作用时间为5min,超声污泥为混合污泥,回流比为7∶120时,减量效果最佳。且在该条件下经一周期的运行,污泥减量效果达到96.24%,COD由进水的830mg/L降至44mg/L,NH+4-N和TN分别由进水的62.43mg/L和103.19mg/L,降解到2.31mg/L和6.52mg/L,达到《城镇污水处理厂污染物排放标准》(GB18918-2002)一级排放标准。关键词超声连续流剩余污泥减量效果中图分类号X705文献标识码A文章编号1673-9108(2010)11-2599-04StudyonoptimizationoftechnicalconditionsofwastesludgereductionLiuYongde1DongYan1ZhaoJihong1,2LiuJun3WangXiang3WangYonghua4LiuYang5(1.SchoolofChemistryandChemicalEngineering,HenanUniversityofTechnology,Zhengzhou450001,China;2.ZhengzhouUniversityofLightIndustry,Zhengzhou450002,China;3.HenanZhengDaEnvironmentalSCL.＆TECH.Co.Ltd.,Zhengzhou450002,China;4.HenanChemicalDesignInstituteBranchofWisonEngineeringLtd.,Zhengzhou450000,China;5.ZhengzhouSewagePurificationCo.Ltd.,Zhengzhou450000,China)AbstractDifferentkindsofsludgeproducedintheactivatedsludgesystemofcontinuousflowrunningstablywasprocessedwithultrasoundandmadebacktothesystem,andthereductioneffectofwastesludgewasstudied.Anorthogonalexperimentalprogramwasdesignedandcarriedouttodeterminetheoptimaloperationconditions.Theresultsofthisstudyshowsthatthereductioneffectofsludgeisthebestwhenthemixedsludgeprocessedbyenergydensityof0.6W/mL,ultrasonictimeof5min,andtherecyclingratioofultrasonicsludgeof7/120.Andoperatingthesystemforoneperiodundertheaboveconditions,therateofreductionis96.24%,CODdeclinesto44mg/Lfrom830mg/Linitially,theeffluentNH+4-NandTNdropfrom62.43to2.31mg/Land103.19to6.52mg/L,respectively,whichhaveachievedfirst-degreedischargestandardbasedondischargestandardofpollutantsformunicipalwastewatertreatmentplant(GB18918-2002).Keywordsultrasound;continuousflow;wastesludge;reductioneffect基金项目:河南省科技攻关项目(0524440062;0623060300)收稿日期:2009-11-18;修订日期:2