污泥臭氧化对MBR运行效能的影响
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2020-04-07 09:05:30
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中国环境科学2005,25(5):519-522ChinaEnvironmentalScience污泥臭氧化对MBR运行效能的影响蒋轶锋。,王琳,王宝贞。,刘硕。,王正。(1.哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090;2.中国海洋大学,山东青岛266003)摘要:结合MBR和污泥臭氧化各自的优点,开展了化学法和生物法相结合的污泥减量技术研究,对污泥臭氧化的特点及其对MBR运行效能的影响进行了考察.实验表明,污泥细胞的溶解随着臭氧投加量的增加而改善,但当投加量大于0.16mg/mgMLVSS时,污泥混合液的性状(MLVSS、SCOD)变化趋缓.在最佳的投加量下,53.1%的MLVSS被臭氧溶解,而SCOD和TN分别升高1287,143.9mg/I~.臭氧对有机物的氧化使得液相中的C/N比仅为8.6.通过3个MBR系统【污泥臭氧化的数量分别为进水流量(Q)的0、0.5%和1%】的平行运行,结果显示,臭氧化能够显著降低系统的污泥产率(0.5%Q和1%Q系统的污泥产率仅为0.17,0.12kgMLSS/kgCOD,较0Q系统分别下降了29%和50%)’同时不对硝化和有机物的去除作用产生明显的影响,系统出水水质良好.关键词:臭氧化;污泥减量;MBR;出水水质中围分类号:X703文献标识码:A文章编号:1000-6923(2005)05-0519--04InfluenceofsludgeozonationonMBRperformanceeficacy.JIANGYi-feng‘,WANGLin,WANGBao-zhen‘,LIUShuo,WANGZheng(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.OceanUniversityofChina,Qingdao266003,China).ChinaEnvironmentalScience,2005,25(5):519—522Abstract:Thetechnicalstudyofsludgereductionofcombiningthechemicalmethodwithbiologicalmethodwasdeveloped,withintegratingthemeritsofMBRandsludgeozonation.ThecharacteristicsofsludgeozonationanditsinfluenceonMBRperformancewereinvestigated.Thesolubilizationofsludgecellimprovedwiththeincreaseofozonedose,butthepropertiesofmixedsludgeliquor(MLVSS,SCOD)changedslowlywhenthedoseWasabove0.16mgO3/mgMLVSS.Undertheoptimaldose,53.1%ofMLVSSWassolubilizedbyozone;whileSCODandTNraised1287and143.9mg/L,respectively.TheratioofC/NinliquorphaseWasonly8.6duetotheoxidationoforganicbyozone.ThroughparallelrunningofthreeMBRssystems(amountsofsludgeozonationwere0,0.5%andl%ofinfluenceflowraterespectively),ozonationcouldreducemarkedlythesludgeproductionrateofthesystem(thesludgeproductionrateof0.5%0andI%Qsystemswereonly0.17and0.12kgMLSS/kgCOD.withreductionof29%and50%respectivelyincomparisonwiththe0Qsystem);meanwhile,noobviousinfluenceWasobservedonnitrationandorganicremoval,theoutflowwaterqualityofthesystemWasgood.Keywords:ozonatiomsludgereduction;MBR;outflowwaterquality活性污泥法作为经济有效的污水处理技术,其运行中会产生大量剩余污泥【“.如何降低剩余污泥的产量已成为研究的热点.当前,污泥减量技术可以分为2类。基于
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