含水率对生活垃圾甲烷化过程的影响

1,2,13,1,BouchezThodore2(11,,,200092;21Cemagref2HBAN,parcdeTourvoie,BP44,92163Antonycedex,France):,,35%65%70%()80%95%(),.,,VFA:80%,96%,;,,95%80%116.,,,95%65%318.:;;;;:X705:A:025023301(2009)0320918206:2008204206;:2008205220:(2006BAJ04A06,2008AA062401);(107122);2(06SR07105):(1979),,,,E2mail:[e-mail]3,E2mail:[e-mail]tonAnaerobicMethanizationofMunicipalSolidWasteQUXian1,2,HEPin2jing1,SHAOLi2ming1,BouchezThodore2(11KeyLaboratoryofYangtzeRiverWaterEnvironment,StateKeyLaboratoryofPollutionControlandResourceReuse,CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China;21Cemagref2HBAN,parcdeTourvoie,BP44,92163Antonycedex,France)Abstract:Biogasproduction,gasandliquidcharacteristicswereinvestigatedforcomparingtheeffectofmoisturecontentonmethanizationprocessofMSWwithdifferentcompositionsoffoodwasteandcellulosicwaste.BatchreactorswereusedtostudytheanaerobicmethanizationoftypicalChineseandFrenchmunicipalsolidwaste(MSW)andcellulosicwastewithdifferentmoisturecontent,as35%,fieldcapacity(65%270%),80%,andsaturatedstate(95%).TheresultsshowedthatforthetypicalChineseandFrenchwaste,whichcontainedputresciblewaste,theintermediateproduct,VFA,wasdilutedbyhighcontentofwater,whichhelpedtoreleasetheVFAinhibitiononhydrolysisandmethanization.MassamountofmethanewasproducedonlywhenthemoisturecontentoftypicalFrenchwastewashigherthan80%,whilehighercontentofmoisturewasneededwhenthecontentofputresciblewastewashigherinMSW,as95%fortypicalChinesewaste.Meanwhilethemethaneproductionrateandtheultimatecumulatedmethaneproductionwereincreasedwhenmoisturecontentwasleveledup.TheultimatecumulatedmethaneproductionofthetypicalFrenchwastewithsaturatedstatewas016timeshigherthanthatofthewastewithmoisturecontentof80%.Forcellulosicwaste,highmoisturecontentofcellulosicmaterialscontributedtoincreasetheattachmentareaofmicrobesandenzymeonthesurfaceofthematerials,whichenhancethewastehydrolysisandmethanization.Whenthemoisturecontentofthecellulosicmaterialsincreasedfromfieldcapacity(65%)tosaturatedstate(95%),theultimatecumulatedmethaneproductionincreasedfor318times.Keywords:moisturecontent;municipalsolidwaste(MSW);foodwaste;cellulosicwaste;anaerobicmethanization[1],,,[2].,,,[1,35].,2[6,7];,.[2],,[7,8].,,30320093ENVIRONMENTALSCIENCEVol.30,No.3Mar.,2009,.1111,(CMSW)[9](FMSW)[10].,[11,12],(CW,[11]).31.13P%Table1BiomasscompositionofthereconstitutedmunicipalsolidwasteintheanaerobicreactorsP%(FMSW)(CMSW)(CW)281861162918711100216417111120103122111311118411015618212015112111L.1050g5g6500rPmin(90%).,Na2CO3(414gPL)KHCO3(1216gPL)(FMSWCMSW)NH4ClK2HPO4(CW),[95%()80%65%70%()35%()].2.35120200d.1680mL,2%,,.113,,100mL,.68mL5mL,(GCCP4900,Varian,U.S.A.)CO2CH4.,,.5mL,015mLInLab427pH(Mettler2Toledo,Urdorf,Switzerland)pH;2mL13000rPmin,Bioritech700(Bioritechinc.,France)(TOC)(TIC).FMSWCMSW,:,1215,TOCpH,TOC;CW,,2Table2InitialwasteweightandvolumeofaddedliquidindifferentreactorsPgPgPmL95%,405680FMSW80%,40511065%,4054035%,405095%,50165680CMSW80%,501658070%,501654595%,105680CW65%,1051035%,10509193:25d.22111.,.FMSW,80%,,,:80%,60d;95%,20d.CMSW,95%,.CW,(2030d),(65%95%),.1Fig.1Cumulatedmethaneproductionunderdifferentmoisturecontents.,.()(FMSW),,80%116,(CW),65%318.21223TOCpH.,FMSWCMSW,,,,,.2,,TOC.FMSWCMSW,,,(1),,TOC,.,,TOC80%1P101P6.2TOCFig.2TOCofliquorindifferentreactorspH.FMSWCMSW,VFApH(3).VFA,029303pHFig.3pHofliquorindifferentreactors,VFApH,pH610,.FMSW80%,,pHTOC,.(CW),[13].,CWFMSWCMSW1P3,CWTOCFMSWCMSW1P3.CW,TOC,,TOC.3,CWFMSWCMSW,pH.,,VFA,pH.3311,,,CO2CH4.4.,.[14,15].,80%.,4Fig.4Relationshipbetweenmoisturecontentandhydrolyzingrate;.,,,.,,VFANH+42N,[1619].,.31235.,.,,,,.,,VFANH+42N,[2022].1293:5Fig.5Relationshipbetweenmoisturecontentandcumulatedmethaneproduction,.313(),,(4,FMSW);,,(4,CW).CMSWFMSW213.,(4),TOC(2).CMSWFMSW(5),80%,FMSW,CMSW,CMSW95%,.,(VFA),,,.,,,,VFA[8].,.,,,65%pH(3)(1).[2325],,,(5).4(1),.(2),VFA,,.(3),,,.:[1]BensonCH,BarlazMA,LaneDT,etal.PracticereviewoffivebioreactorPrecirculationlandfills[J].WasteManagement,2007,27(1):13229.[2]PohlandFG,Al2YousfiAB.Designandoperationoflandfillsforoptimumstabilizationandbiogasproduction[J].WaterScienceandTechnology,1995,30(12):1172124.[3]SponzaDT,AgdagON.Impactofleachaterecirculationandrecirculationvolumeonstabilizationofmunicipalsolidwastesinsimulatedanaerobicbioreactors[J].ProcessBiochemistry,2004,39(12):215722165.[4]ReinhartDR,McCreanorPT,TownsendT.Thebioreactorlandfill:itsstatusandfuture[J].WasteManagementandResearch,2002,20(2):1722186.[5]MehtaR,BarlazMA,YazdaniR,etal.Refusedecompositioninthepresenceandabsenceofleachaterecirculation[J].JournalofEnvironmentalEngineering2ASCE,2002,128(3):2282236.[6]BarlazMA,HamRK,SchaeferDM.Methaneproductionfrommunicipalrefuse:areviewofenhancementtechniquesandmicrobialdynamics[J].CriticalReviewsinEnvironmentalControl,1990,19(6):557258.[7]HePJ,QuX,ShaoLM,etal.Landfillleachatetreatmentinassistedlandfillbioreactor[J].JournalofEnvironmentalSciences2China,2006,18(1):1762179.[8]HePJ,QuX,ShaoLM,etal.Leachatepretreatmentfore