pH调节方法对厨余垃圾两相厌氧消化中水解和酸化过程的影响

26120061ActaScientiaeCircumstantiaeVol.26,No.1Jan.,2006:(1977),,,E2mail:[e-mail];3(),E2mail:[e-mail],Tel:[phone]Biography:ZHANGBo(1977),female,postdoctoral,E2mail:[e-mail];3CorrespondingauthorE2mail:[e-mail],Tel:[phone],,.2006.pH[J].,26(1):45-49ZhangB,CaiWM,HePJ.2006.TheinfluenceofpHadjustmentmethodsonhydrolysisandacidogenesisofkitchenwastesintwo-phaseanaerobicdi2gestion[J].ActaScientiaeCircumstantiae,26(1):45-49pH1,2,2,1,311,20009221,200240:2005208208:2005210226:2005211216:pHNa+.3pH(NaOHpH7,NaOHCa(OH)212hpH7C/NpH7)Na+(VFA)VFA.,NaOH12hpH,3pHNa+,C/NpH,0.199d-1,VFA335gL-1.224gL-1,6gL-1,VFA.:;;;pH;:025322468(2006)0120045205:X705:ATheinfluenceofpHadjustmentmethodsonhydrolysisandacidogenesisofkitch2enwastesintwo2phaseanaerobicdigestionZHANGBo1,2,CAIWeimin2,HEPinjing1,31.StateKeyLaboratoryofPollutionControl&ResourcesReuse,TongjiUniversity,Shanghai2000922.SchoolofEnvironmentalScience&Engineering,ShanghaiJiaotongUniversity,Shanghai200240Received8August2005;receivedinrevisedform26October2005;accepted16November2005Abstract:BatchexperimentswerecarriedouttodeterminetheeffectofpHadjustmentmethodsontheaccumulationofNa+intheeffluent,hydrolysisandacidogenesisofkitchenwastesinthetwo2phaseanaerobicdigestion.ThreepHadjustmentmethodsincludedtheinitialadjustmentofpHusingNaOH,batchpHadjustmentusingNaOHandCa(OH)2andthepHadjustmentwithregulatingtheratioofcarbonandnitrogen.Theresultsshowedthattheefflu2entNa+concentrationinthehydrolysis2acidogenesisliquidcouldbereducedatthreepHadjustmentmethods.However,comparedtotheothertwopHad2justmentmethods,thepHadjustmentmethodwithregulatingtheratioofcarbonandnitrogenincreasedthehydrolysisandacidogenesisratesofkitchenwasteswiththefirst2orderhydrolysisrateconstantof0.199d-1andVFAconcentrationof35gL-1.Thelacticacidconcentrationdecreasedto6gL-1af2terthemaximumlacticacidconcentrationof24gL-1wasachievedontheseconddayoftheexperiment.Andthepropionicaciddidn’tpredominateovertheVFAconstituents.Keywords:anaerobic;hydrolysis;acidogenesis;pHadjustment;kitchenwastespH,pH7,(,2005).pH(Yuetal.,2003).,pH,pH.NaOHNaHCO3Ca(OH)2,©1995-2007TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.26.,,,8gL-1Na+(Chenetal.,2003;Feijooetal.,1995).,,pH,.,pH.,,,3pHNa+,pH.1(Materialsandmethods)111,.1105kgL-1.4.1.(VS)(TS),9619%;(SS)TS,7414%.CNP10020111,.1Table1Samplingcomponentsofkitchenwastes/mmTSVSSSVSSpHVFA/(gL-1)TOCTOC/(gL-1)COD/(gL-1)212.9%12.5%9.6%9.4%3.93.646.8%11.8166.5COD/(gL-1)/(gL-1)NH+42N/(mgL-1)TP/(mgL-1)P/(mgL-1)/(mgL-1)C/N/P53.13.3310182.5172.4104.810020.11:TSVS;TOC11235.300mL500mL,.3pH,15%NaOHpH7,;212h1molL-1NaOH1molL-1Ca(OH)2,pH7.3C/NpH.3,3C/N.pH,pHpH.015g115g3gC/N403020,NaOHpH7,NH+42NC/N2pH.3pH.pH,,2,15d.VFACOD,VFA.CODVFA5%.113pHTSVSSSVSSCODNH+42NTP(APHA,1995).TOCmultiN/C3000().(BCHI,DigestionUnitK-424;BCHI,DistillationUnitB-324).C18(2010A,).CODTOCTPKN,10000rmin-1,(APHA,1995).Na+Ca2+(ICP-AES,JARRELLASH1IRISAdvantage).2(Results)C/NNH+42N,.,C/NNH+4264©1995-2007TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1:pHN.1C/NNH+42N.,,NH+42N,pHNH+42N.C/N,NH+42N.C/N20NH+42N3gL-1.,pH,C/N30.2pHVFAFig12VariationsofVFAandlacticacidconcentrationatthreepHadjustmentmethods1C/NNH+42NFig11NH+42NConcentrationatdifferentfeedingC/Nratio23pHNa+(kH)(P0)(Veeken(2000)).(,2005)NaOH12hpH7,TSNa+146197mgg-1,Na+17103gL-1,01148d-1.2,3pHNa+,Na+Na+8gL-1(Chenetal.,2003;Feijooetal.,1995).C/NpH,01199d-1.2pHNa+Table2Na+concentration,determinedfirst-orderhydrolysisratecon2stantsandstartingconcentrationofbiodegradableparticularpol2ymersinthereactorsatthreepHadjustmentmethodsTSNa+/(mgg-1)Na+/(gL-1)kH/d-1P0/(gL-1)NaOHpH27102411201136141104Ca(OH)2NaOH60132613801083117173C/N581966104011991401253pHVFA2a.pHVFANaOHpH;C/NpHVFA,74©1995-2007TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2635gL-1.VFApH.3pH2b.,.NaOHpH,2pH;pH,233gL-1,7gL-1;C/NpH24gL-1,6gL-1.33pH9,VFAVFA.NaOHpH7,VFApH5,,VFA69%;,VFA1515%.2pH,,,VFA4216%,.C/NpH,VFA,VFAVFA,,VFA,VFA.3pHTable3TheindividualVFAconstituentsandlacticacidconcentrationatdifferentpHlevelspHVFA/(gL-1)NaOHpH6.6%8.9%15.5%69.0%28.2Ca(OH)2NaOH2.9%42.6%3.5%50%34.0C/N24.0%24.5%18.2%33.3%40.23(Discussion)311pHpH,,.,C/N,,2pH,C/NpHVFA.C/NpHNa+,NH+42NpH,.,,.,(,1993).pH(Fu,1999;Hofvendahl,2000),,,C/NpH7,.,2pH312C/NNH+42N,.,NH+42N(Rittmannetal.,2001).,NH3,OH-(H2O+NH3=NH+4+OH-),.NH+42NpH,,VFApH,pH.C/NpH.NH+42N,BreureKoster(Breureetal.,1984;Kosteretal.,1988)NH+42N5gL-184©1995-2007TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1:pH.,NH+42N,pHNH+42N(NH3).C/N20,NH+42N3gL-1.Spiece(2001),pH735,NH+42N3gL-1,NH330mgL-1;,NH325140mgL-1(Omiletal.,1995).,,NH+42N,C/N30.,(),pH.,pH(Murtoetal.,2004).4(Conclusions)NaOHpH12hpH7pH,C/NpH,Na+,VFA,.:,,1962,,,.100,30SCI/EI,3,5,4,3.References:APHA119951StandardMethodfortheExaminationofWaterandWater2water(19thedn1)[M]1Washington,DC:AmericanPublicHealthAssociationBreureAM,vanAndelJG119841Hydrolysisandacidogenicfermenta2tionofaprotein,gelatin,inananaerobiccontinuousculture[J]1ApplMicrobiolBiotechnol,20:4549Chen