含水率对生活垃圾甲烷化过程的影响瞿贤

1,2,1＊,1,BouchezThéodore2(1.,,,　200092;2.Cemagref-HBAN,parcdeTourvoie,BP　44,92163Antonycedex,France):,、,35%、65%～70%()、80%95%(),.,,VFA:80%,96%,;,,95%80%1.6.,,,95%65%3.8.:;;;;:X705　:A　:0250-3301(2009)03-0918-06:2008-04-06;:2008-05-20:(2006BAJ04A06,2008AA062401);(107122);-(06SR07105):(1979～),,,,E-mail:[e-mail]＊,E-mail:[e-mail]tonAnaerobicMethanizationofMunicipalSolidWasteQUXian1,2,HEPin-jing1,SHAOLi-ming1,BouchezThéodore2(1.KeyLaboratoryofYangtzeRiverWaterEnvironment,StateKeyLaboratoryofPollutionControlandResourceReuse,CollegeofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China;2.Cemagref-HBAN,parcdeTourvoie,BP44,92163Antonycedex,France)Abstract:Biogasproduction,gasandliquidcharacteristicswereinvestigatedforcomparingtheeffectofmoisturecontentonmethanizationprocessofMSWwithdifferentcompositionsoffoodwasteandcellulosicwaste.BatchreactorswereusedtostudytheanaerobicmethanizationoftypicalChineseandFrenchmunicipalsolidwaste(MSW)andcellulosicwastewithdifferentmoisturecontent,as35%,fieldcapacity(65%-70%),80%,andsaturatedstate(95%).TheresultsshowedthatforthetypicalChineseandFrenchwaste,whichcontainedputresciblewaste,theintermediateproduct,VFA,wasdilutedbyhighcontentofwater,whichhelpedtoreleasetheVFAinhibitiononhydrolysisandmethanization.MassamountofmethanewasproducedonlywhenthemoisturecontentoftypicalFrenchwastewashigherthan80%,whilehighercontentofmoisturewasneededwhenthecontentofputresciblewastewashigherinMSW,as95%fortypicalChinesewaste.Meanwhilethemethaneproductionrateandtheultimatecumulatedmethaneproductionwereincreasedwhenmoisturecontentwasleveledup.TheultimatecumulatedmethaneproductionofthetypicalFrenchwastewithsaturatedstatewas0.6timeshigherthanthatofthewastewithmoisturecontentof80%.Forcellulosicwaste,highmoisturecontentofcellulosicmaterialscontributedtoincreasetheattachmentareaofmicrobesandenzymeonthesurfaceofthematerials,whichenhancethewastehydrolysisandmethanization.Whenthemoisturecontentofthecellulosicmaterialsincreasedfromfieldcapacity(65%)tosaturatedstate(95%),theultimatecumulatedmethaneproductionincreasedfor3.8times.Keywords:moisturecontent;municipalsolidwaste(MSW);foodwaste;cellulosicwaste;anaerobicmethanization　　[1],,,[2].,,,[1,3～5].,2[6,7];,.[2],,[7,8].,、,30320093　　　　　　ENVIRONMENTALSCIENCEVol.30,No.3Mar.,2009DOI:10.13227/j.hjkx.2009.03.023,.1　1.1　,(CMSW)[9](FMSW)[10].,[11,12],(CW,、[11]).31.1　3%Table1　Biomasscompositionofthereconstitutedmunicipalsolidwasteintheanaerobicreactors%(FMSW)(CMSW)(CW)28.861.6—29.87.11002.64.7—11.120.0—3.22.1—13.11.8—4.10.5—6.82.2—0.5——1.2　1.1L.10～50g5g6500rmin(90%).,Na2CO3(4.4gL)KHCO3(12.6gL)(FMSW、CMSW)NH4ClK2HPO4(CW),[95%()、80%、65%～70%()35%()].2.35°120～200d.1680mL,2%,,.1.3　,,100mL,.6～8mL5mL,(μGCCP4900,Varian,U.S.A.)CO2CH4.,,.5mL,0.5mLInLab427pH(Mettler-Toledo,Urdorf,Switzerland)pH;2mL13000rmin,Bioritech700(Bioritechinc.,France)(TOC)(TIC).FMSWCMSW,:,1∶2.5,TOCpH,TOC;CW,,　　　　　　2　Table2　Initialwasteweightandvolumeofaddedliquidindifferentreactorsg　　gmL95%,405680FMSW80%,—40511065%,4054035%,405095%,50.65680CMSW80%,—50.658070%,50.654595%,105680CW65%,1051035%,10509193:25d.2　2.1　1.,.FMSW,≥80%,,,:80%,60d;95%,20d.CMSW,95%,.CW,(20～30d),(65%95%),.1　Fig.1　Cumulatedmethaneproductionunderdifferentmoisturecontents　　.,.()(FMSW),,80%1.6,(CW),65%3.8.2.2　23TOCpH.,FMSWCMSW,,,,,.2,,TOC.FMSWCMSW,,,(1),,TOC,.,,TOC80%110～16.2　TOCFig.2　TOCofliquorindifferentreactors　　pH.FMSWCMSW,VFApH(3).VFA,920　　　　　　303　pHFig.3　pHofliquorindifferentreactors,VFApH,pH6.0,.FMSW80%,,pHTOC,.(CW),[13].,CWFMSWCMSW13,CWTOCFMSWCMSW13.CW,TOC,,TOC.3,CWFMSWCMSW,pH.,,VFA,pH.3　3.1　,,,、、CO2CH4.4.,.[14,15].,80%.,4　Fig.4　Relationshipbetweenmoisturecontentandhydrolyzingrate;.,,,.,,、VFA、NH+4-N,[16～19].,.3.2　35.,.,,,,.,,VFA、、NH+4-N,[20～22].9213:5　Fig.5　Relationshipbetweenmoisturecontentandcumulatedmethaneproduction,.3.3　(),,(4,FMSW);,,(4,CW).CMSWFMSW2.3.,(4),TOC(2).CMSWFMSW(5),80%,FMSW,CMSW,CMSW95%,.,(VFA),,,.,,,,VFA、[8].,.,,,65%pH(3)(1).、、[23～25],,,(5).4　(1),.(2),VFA,、,.(3),,,.:[1]　BensonCH,BarlazMA,LaneDT,etal.Practicereviewoffivebioreactorrecirculationlandfills[J].WasteManagement,2007,27(1):13-29.[2]　PohlandFG,Al-YousfiAB.Designandoperationoflandfillsforoptimumstabilizationandbiogasproduction[J].WaterScienceandTechnology,1995,30(12):117-124.[3]　SponzaDT,AgdagON.Impactofleachaterecirculationandrecirculationvolumeonstabilizationofmunicipalsolidwastesinsimulatedanaerobicbioreactors[J].ProcessBiochemistry,2004,39(12):2157-2165.[4]　ReinhartDR,McCreanorPT,TownsendT.Thebioreactorlandfill:itsstatusandfuture[J].WasteManagementandResearch,2002,20(2):172-186.[5]　MehtaR,BarlazMA,YazdaniR,etal.Refusedecompositioninthepresenceandabsenceofleachaterecirculation[J].JournalofEnvironmentalEngineering-ASCE,2002,128(3):228-236.[6]　BarlazMA,HamRK,SchaeferDM.Methaneproductionfrommunicipalrefuse:areviewofenhancementtechniquesandmicrobialdynamics[J].CriticalReviewsinEnvironmentalControl,1990,19(6):557-58.[7]　HePJ,QuX,ShaoLM,etal.Landfillleachatetreatmentinassiste