电解法深度处理生活垃圾焚烧厂渗滤液研究

胡晨燕1,李光明1,夏凤毅2,周仰原1,张徵晟1(1.同济大学污染控制与资源化研究国家重点实验室,上海200092;2.温州大学生命与环境科学学院,浙江温州325027):采用三元电极对垃圾焚烧厂渗滤液的生化)混凝出水进行电解处理,研究了其处理效果及影响因素结果表明,在电解反应过程中COD的降解符合三级反应动力学,其t时刻的出水浓度为:Ct=(2kt+C-20)-0.5;电流pH值电解时间氯离子浓度进水COD浓度对有机物去除率的影响较大,而极间距温度和极水比则影响较小此外,考察了该电极对氮化合物的去除效果结果表明,在电解过程中亚硝态氮很快被氧化成硝态氮,之后氨氮转化为氮气,总氮基本以硝态氮的形式存在:渗滤液;垃圾焚烧厂;电解;氨氮:X703.1:C:1000-4602(2006)15-0095-05ElectrolysisMethodforAdvancedTreatmentofLeachatefromMunicipalSolidWasteIncinerationPlantHUChen-yan1,LIGuang-ming1,XIAFeng-yi2,ZHOUYang-yuan1,ZHANGZheng-cheng1(1.StateKeyLabofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China;2.SchoolofLifeandEnvironmentalScience,WenzhouUniversity,Wenzhou325027,China)Abstract:Athree-dimensionalelectrodewasusedinanelectrolysistreatmentofbiologicalandco-agulativeeffluentfromasolidwasteincinerationplan.tThetreatmentefficiencyandimpactingfactorswereinvestigated.Theresultsindicatethatthedegradationprocesscanbeexpressedbytheformula:Ct=(2kt+C-20)-0.5,inwhichtheCtistheCODconcentrationoftreatmenteffluen.tSomefactorsplayim-portantrolesintheCODdegradation,suchasthecurrentdensity,pHvalue,electrolysistime,concen-trationofchlorineionandinfluentCOD.Somefactorsplaysmallerrolesinthisprocess,suchasintervalsbetweenelectrodes,temperature,theratioofelectrodeareastotheinfluentvolume,andetc.Meanwhile,effectsofnitrogenremovalbytheelectrodewereinspected.Theresultsshowthatnitritenitrogencanbeconvertedtonitratenitrogenrapidly,thenammonianitrogenisoxidatedtonitrogen.Finally,themajorcontentofthetotalnitrogenisnitratenitrogen.:(863)(2003AA644030)Keywords:leachate;solidwasteincinerationplan;telectrolysis;ammonianitrogen#95#第22卷第15期2006年8月中国给水排水CHINAWATER&WASTEWATERVo.l22No.15Aug.2006,,,[12]SPR),,,1试验设备与方法111,UASB)SBR)11Tab.1WaterqualityofexperimentalleachateCOD/(mg#L-1)pH/NTU//(mg#L-1)/(LS#cm-1)/(mg#L-1)BOD5/(mg#L-1)350~7505.5~720~40200~4504500~550018000~2100045~55501121(6cm@13cm),11mm(6cm@13cm),RuO2-IrO2-TiO2/Ti(SPR),500mL11Fig.1Schematicdiagramofexperimentalset-uppH,,COD2结果与讨论211pH,COD,L18(37)232Tab.2Orthogonaltestresult/A/(cm2#L-1)pH/h/e/mm/(mg#L-1)$COD/(mg#L-1)10.5804115520005720.510071.52010500010330.51201022515800013340.758041.52015800027450.7510072255200021860.7512010115105000927180712510800014481100101.5151520006891120422055000256100.5801022010200094110.51004125155000111120.512071.51558000184130.75807215155000149140.751001012058000164150.7512041.52510200019616180101.5255500016417110042151080002461811207120152000463Tab.3Rangeanalysisoforthogonaltestresult/A/(cm2#L-1)pH/h/e/mm/(mg#L-1)1113.7147190102.3132.7173.8113.22182.2151.7140.7164.8156.2145.8145.83154151.2119.2182.7161130.2190.868.54.770.880.328.343.777.72,#96#第15期中国给水排水第22卷,COD274mg/L3,,pH,44Tab.4Parametersofoptimizedprocess/ApH/mm/(cm2#L-1)/e/h/(mg#L-1)0.7545100201.55000212,55Tab.5Primaryparametersofsingleinfluentialfactortest/h/ApHCOD/(mg#L-1)/(mg#L-1)/e/mm/(cm2#L-1)0~50.75446049502051000~30.25~1.2544765125205100pH0~30.753~75084865205100COD0~30.754285~73347502051001.50.754468800~90002051001.50.754521532010~3551001.50.7545285210205~251001.50.754503482520540~120212115,COD22CODFig.2VariationofCODwithtime2,,COD90minCOD,40%,3.5hCOD15%,,COD,,COD,(1):d[COD]=k#[COD]3t#dt(1)t=0,COD=460mg/L,,(2):Ct=(2kt+C-20)-0.5,R2=0.9830(2)Ct)))tCODC0)))CODt)))k))),3.1455@108L2/(mg2#min)212125,(2)COD,33CODFig.3VariationofCODwithdifferentcurrent#97#第15期胡晨燕,等:电解法深度处理生活垃圾焚烧厂渗滤液研究第22卷3,COD,,,O3Cl2,[3],COD,,COD[4]21213pH5,(2)pHCOD,44pHCODFig.4DegradationofCODwithdifferentpHvalue4,pH4COD,pH3,pHCOD,pH7[5],,,pH,,pH4,[1]21214COD5,(2)CODCOD,55,COD,COD,(#OHH2O2Cl2ClO-),5CODCODFig.5DegradationofCODwithdifferentCODconcentration212155,COD,COD,3000~5000mg/L,5000mg/LCOD,,,COD,,,,,21216,5,COD,10~35eCOD,45%~53%,,:,,;,;,212175,COD#98#第15期中国给水排水第22卷,COD,15mm,,,;,(),COD212185,COD,,COD,10%,,,,,,,,,,COD2134,,66Fig.6Degradationofnitrogen-containingcompound6,,20min100%;,60min;,;,(),,:NO-2+2OH-NO-3+H2O+2eNH3+3OH-12N2+3H2O+3e3结论,pH,COD:Ct=(2kt+C-20)-0.5,1.5h,COD,0.75ACOD;pH4COD;CODCOD,15mm,COD,5000mg/L,COD,COD,,,,:[1],,,.[J].,2001,17(8):14-17.[2],.[J].,2003,22(11):822-825.[3],.[J].,2002,25(2):17-21.[4],.[M].:,2003.[5].[M].:,1993.:[phone]E-mail:[e-mail]:20043483026304:2006-02-02#99#第15期胡晨燕,等:电解法深度处理生活垃圾焚烧厂渗滤液研究第22卷