阴阳离子交换纤维组合深度处理垃圾渗滤液

第37卷第4期2019年4月环境工程EnvironmentalEngineering阴阳离子交换纤维组合深度处理垃圾渗滤液*苏念英l黎往海2陈明月2谢元健2(1.桂林市生产力促进中心，广西桂林541002;2.广西大学化学化工学院，南宁530004)Vo1.37No.4Apr.2019摘要:采用阴阳离子交换纤维对垃圾渗滤液进行深度处理，研究了阴阳离子纤维的最佳组合方式、水样流速和纤维装填密度对渗滤液中主要污染物NH)-N和COD去除效果的影响，以及纤维的再生方式和再生性能。结果表明:离子交换纤维采用先阴后阳的组合工艺对垃圾渗滤液的深度处理效果最佳;在水样流速为2.0mLlmin、装填密度为0.25g/c旷的条件下，动态处理渗滤液后，出水的ρ(NH)-N)和ρ(COD)分别为18.9，61.1mg/L，均达到GB16889-2∞时生活垃圾填埋场污染控制标准》要求;纤维静态再生后性能优良，可反复使用多次;经10次静态再生、循环使用后，阴离子纤维对COD的吸附能力可恢复至初始值的94%以上，平衡交换量>17.6mg/g，阳离子纤维对NH)-N的吸附能力达到初始能力的93%以上，平衡交换量>13.6mg/go该技术对垃圾渗滤液有较好的处理效果，为垃圾渗滤液的深度处理工程应用提供了参考。关键词:离子交换纤维;垃圾渗滤液;深度处理;纤维再生;NH)-N;CODDOI:10.13205/j.hjgc.201904014ADVANCEDTREATMENTOFLANDFILLLEACHATEBYANIONANDCATIONEXCHANGEFIBERCOMBINATIONSUNian-yingl,LIXuan-hae,CHENMing-yue2,XIEYuan-jian2(1.GuilinProductivityPromotionCenter,Guilin541002,China;2.SchoolofChemistryandChemicalEngineering,GuangxiUniversity,Nanning530004,China)Abstrad:Theeffectoftheoptimalcombinationofanionandcationexchangefibers,thesamplewaterspeedandthepackingdensityoffibersonremovalofthemainpollutantsNH)-NandCODinleachate,aswellasfiberregenerationmodeandperformancehavebeenstudiedwhenanionandcationexchangefiberswereusedtotreatlandfillleachate.Theresultsshowedthatthecombinationof..anionfiberfirstandthencationfiberhadthebesteffectinadvancedtreatmentoflandfillleachate.Whensamplewaterspeedwas2.0mLlminandfiberpackingdensitywas0.25g/cm),afterdynamictreatmentoftheleachate,residualconcentrationsofNH)-NandCODwere18.9,61.1mg/Lrespectively,whichmettherequirementsofStandardforPollutionControlontheLandfillSiteofMunicipalSolidWaste(GB16889-2008);thefibershadgoodperformanceafterstaticregenerationandcouldbeusedrepeatedly;after10timesofstaticregenerationandrecycling,theadsorptioncapacityofanionfibertoCODwasover94%ofitsinitialadsorptioncapacityanditsequilibriumexchangecapacitytoCODwasover17.6mglg,whiletheadsorptioncapacityforcationfibertoNH)-Nwasover93%anditsexchangecapacitytoNH)-Nwasover13.6mglg.Thistechnologyhadbettertreatmenteffectonlandfillleachateandprovidedanewfeasiblerefere