渗滤液与城市污水合并处理过程的有机物去除特征-何品晶

何品晶,付�强,邵立明,等.渗滤液与城市污水合并处理过程的有机物去除特征[J].环境科学学报,2005,25(7):954-958HEPinjing,FUQiang,SHAOLiming,etal.Studyonremovalcharacteristicsoforganicsinleachatebyco-treatmentwithdomesticwastewater[J].ActaScientiaeCircumstantiae,2005,25(7):954-958渗滤液与城市污水合并处理过程的有机物去除特征何品晶*,付�强,邵立明,薛俊峰,李国建同济大学污染控制与资源化研究国家重点实验室,上海�200092收稿日期:2004-11-08���修回日期:2005-01-17���录用日期:2005-01-26摘要:以上海老港垃圾填埋场调蓄池的渗滤液,及其经厌氧甲烷化垃圾填埋柱循环回灌处理后的出水和其再经过混凝处理后的出水等3种不同处理水平的渗滤液为研究对象,分别以不同的比例与城市污水混合,采用好氧活性污泥法合并进行处理,对进出水的COD、UV254吸光度和溶解性有机物的分子量分布及污泥的脱氢酶活性进行了测定分析.结果表明:当渗滤液混合比例小于10%时,出水的COD和UV254吸光度随混合比例线性升高,污泥的活性相应线性降低;而当混合比例大于20%时,污泥活性阶跃降低,出水COD和UV254吸光度的升高超出线性范围.渗滤液混合比例为20%与比例为5%的混合污水相比,分子量1k~4k的溶解性有机物去除率显著降低.渗滤液与城市污水合并处理的混合比例大于10%时,微生物的有机物降解能力会受到严重损害,且常规的渗滤液生物和物化预处理不能减轻此种损害.关键词:渗滤液;城市污水;合并处理;分子量分布;污泥活性文章编号:0253-2468(2005)07-0954-05��中图分类号:X705��文献标识码:AStudyonremovalcharacteristicsoforganicsinleachatebyco-treatmentwithdomesticwastewaterHEPinjing*,FUQiang,SHAOLiming,XUEJunfeng,LIGuojianStateKeyLaboratoryofPollutionControlandResourcesReuse,TongjiUniversity,Shanghai,200092Received8November2004;�receivedinrevisedform17January2005;�accepted26January2005Abstract:LeachatefromtheregulationpondofLaoganglandfillinShanghail,effluentfromananaerobicmethanogeniclysimeterforrecirculatingLaoganglandfillleachateandtheeffluentoftherecirculatedleachatefurthertreatedbycoagulationwererespectivelymixedwithdomesticwastewaterindifferentratios.TheCODandUV254intheinfluentandeffluent,molecularweight(MW)distributionofdissolvedorganicmatter(DOM)anddehydrogenaseactivityofsludgeduringaerobicprocessingwereanalyzed.TheresultsshowedthatCODandUV254increasedlinearlyasleachateratiorose,whiletheactivityofsludgedecreasedwhenleachateratiowaslessthan10%;CODandUV254increasedbeyondthelinearrangewhileactivityofsludgedecreasedheavilywhenleachateratiowasmorethan20%.Comparedtheleachateratioof20%with5%,theremovalrateofDOMwithMWbetween1kand4kdescendedobviously.Itcanbeconcludedthatiftheleachatevolumeishigherthan10%,microorganism�sactivitywillbeseriouslyimpaired,andthei