pH值对有机垃圾厌氧水解和酸化速率的影响

2006,26(1)57~61ChinaEnvironmentalSciencepH,,,(,200092),pH.,pH5~7;pHpH5,6,7,8,,K6.81×105,6.57×104,3.51×104,7.55×104,2.47×104h1.pH=7,,,;pH=5pH=6,;pH=8,;pH,.pHX705A10006923(2006)01005705TheinfluenceofpHvalueonanaerobichydrolysisandacidogenesisratesofbiodegradableorganicwaste.HEPin-jing,PANXiu-jiang,LUFan,SHAOLi-ming(StateKeyLaboratoryofPollutionControlandResourceUse,TongjiUniversity,Shanghai200092,China).ChinaEnvironmentalScience,2006,26(1)57~61AbstractThroughthebatchanaerobicfermentationtestofrottenorganicwaste,theinfluenceofpHvalueoffermentationliquoronhydrolysisandacidogenesisratewerecompared.ThepHvalue5~7ofthefermentationliquorwasfavorableforthehydrolysisofparticulateorganism.UndertheconditionsofuncontrolledpHvaluesof5,6,7and8,whenthemicroorganismsgrewatstationaryphase,thehydrolysisrateconstantsKwere6.81×105,6.57×104,3.51×104,7.55×104,2.47×104h1,respectively.ThepH=7oftheliquorwasmostpreferableforthemicrobialsyntheticmetabolismandfurtherpromotinghydrolysisandacidogenesisprocessesofcarbohydrateandprotein,displayingtheproductionoflargeamountofmetabolitessuchasethanol,aceticacid,butyricacidandammonianitrogen,asincreaseofotherkindsmetabolite.pH=5andpH=6promoteacidogenesisprocessatthelaterstageofthereaction;pH=8couldinhibitetheacidogenesisprocess;anduncontrolledpHvaluecouldinhibiteseriouslytheprocessesofhydrolysisandacidogenesis.KeywordspHvaluerottenorganicwasteanaerobicfermentationhydrolysisrateacidogenesisrate,[1].4,[1],.pH[25].,pH[2,3];pH[4,5].,,pH,.11.1,2~3mm,1..1.2,(37.0±0.5,2.4L),20050509863(2001AA644010,2003AA644020);(PRAE04-03)*,,[e-mail]5826HotecpH101pH,HClNaOHpH,pHpH5,6,78,200h.,,.,([6]).1Table1Physiochemicalcharacteristicsofmaterials(g/g)(g/g)(TS)0.071~0.1170.236~0.295(VS)0.968~0.9780.058~0.0680.532~0.6180.078~0.1151.3.12000r/min15min,0.45µm(TOC)(VFAs).NaCl,(H2CO2CH4)VFAs()()(GC102-TCDGC122-FIDGC102-FID),TOCTNb/TCmultiN/C3000Analyzer,[7],N-(1-)-[8].22.1pHpH,pH,48h,pH3.90~4.00,,pH.pH,pH(4.00).2.2pH2.2.1,TOCt0,VS(mg/g)TOC;tTOCtTOCt0∆TOCpH.1,pHpH=5pH=6,∆TOCt=8h,,,8h;pH=7∆TOC.pH,∆TOC50h.pH567,∆TOC.pH7pH5pH6.pH=8,∆TOC,50h.TOC,TOCCO2CH4,.,TOC1/8(5pH,200h2L,CH4,CO250%,VS2.5mg/g),1TOC.1∆TOCFig.1Temporalevolutionof∆TOCTOC.,pHpH=5pH=7,(v)(v),pH=6,vv;pH=8,vv.050100150200-40-20020406080100120140pHÖµ²»¿ØÖÆ,TOC|t=0=68mg/gpH5,TOC|t=0=103mg/gpH6,TOC|t=0=87mg/gpH7,TOC|t=0=141mg/gpH8,TOC|t=0=138mg/gTOCt0(h)∆TOC(mg/g)pH,TOCt0=68mg/gpH5,TOCt0=103mg/gpH6,TOCt0=87mg/gpH7,TOCt0=141mg/gpH8,TOCt0=138mg/g1pH59,,v,vv,TOC.,pH5,6,7,,pHpH=8.2.2.2,,VFAs.VS(mg/g),2a,pHpH=8VFAs;pH5,6VFAs15mg/g,120~150h;pH=7,VFAs,200h,VFAspH5,62,120mg/g.2b,pH5,6,7870mg/g,pH30mg/g;150~200h,pH6,7.2cpHpH=8;pH5pH6,25mg/g;pH=790mg/g.2,pH=7,50h,VFAs.pH=5pH=6,pH=5VFAspH;pH=8pH(pH=4),pHpH=8.2pHFig.2EffectofpHvalueoncarbontransformation2.3pH3pHFig.3EffectofpHvalueonnitrogentransformation3,.pH=7(VS15mg/g),pH=6(VS7mg/g)pH=5(VS5mg/g);pH8(VS4mg/g),120h(VS7mg/g),pH,2mg/g.,pH=7.2.4pHpHVFAs.4a,pH(1500mg/L),10mg/L;130h,20mg/L;,3.2:1.pH=5(4b);020406080100120140pHÖµ²»¿ØÖÆpH5pH6pH7pH8VFAsVS(mg/g)050100150200020406080100VS(mg/g)020406080100VS(mg/g)200150100500200150100500(h)(h)(h)abcpH05101520pHÖµ²»¿ØÖÆpH5pH6pH7pH8200150100500(h)VS(mg/g)pH60264:1;150h,,2.6:1.pH=6(4c)(t=200h10000mg/L),115h,t=200h1300mg/L;(100h)(20mg/L);2.6:1;120h,,4:1.pH=7(4d),t=200h,31:0.2:1.5;(200mg/L);17:1,,;(200mg/L).pH=8(4e)VFAs;4:1.4pHVFAsFig.4EffectofpHvalueontheproductionofVFAsandalcohols,pH,.pH=7,.,pH.33.1,:SSBXBSddXXXKtKXX=−+(1):XS;XB;K;KX[1].,XB0=0.XBXPXB=YB/PXP,YB/P(g/g).,XS=X0XBXH,X0,XH.(1):0BHSPB/PXB/PPSd()dXXXXXKYtKYXX−−=−+(2),YB/PmolATPYATP=10.5g/mol[9],YB/P()0.373YB/P()0.124,YB/P()0.187[9],,YB/P=0.1.1,,;YATP010203040506005010015020005010015020002040608010005010015020001020304050aceticacidpropionicacidbutyricacidiso-butyricacidvalericacidiso-valericacidmethanolethanoln-propanol(a)pHÖµ²»¿ØÖÆ(b)pH=5(c)pH=6(d)pH=7(e)pH=8(h)VS(mg/g)(h)VS(mg/g)(h)(a)pH(b)pH=5(c)pH=6(d)pH=7(e)pH=81pH6132g/mol,YATP[10],YB/P0.5.,,t0~80hYB/P=0.1;t80~200h,YB/P=0.6.1,2XHXP.t0~80h,YB/P0.5,,K0;YB/P=0.6,pHpH5,6,7,8,K1.80×104h1(R2=0.9963),1.03×103h1(R2=0.9240),1.85×104h1(R2=0.9813),2.30×104h1(R2=0.9570)1.97×104h1(R2=0.9943);YB/PK.t80~200h,,pHpH5,6,7,8,K6.81×105h1(R2=0.9890),6.57×104h1(R2=0.8710),3.51×104h1(R2=0.9658),7.55×104h1(R2=0.9570)2.47×104h1(R2=0.9943);YB/P0.05~0.40,K.3.2[11].24,,,,.,pH=7,,,pH=7,1:1,,.pH=7;pH=6pH=7.44.1pH5~7,.pHpH5,6,7,8,,K6.81×105,6.57×104,3.51×104,7.55×104,2.47×104h1.4.2pH=7,,,.4.3pH=5pH=6,;pH=8;pH.4.4pH.pH5~7,pH=7;pH.4.5pH.[1]Mata-AlvarezJ.Biomethanizationoftheorganicfractionofmunicipalsolidwastes[M].London:IWAPublishing,2002.[2]BabelS,FukushiK,SitanrassameeB.Effectofacidspeciationonsolidwasteliquefactioninananaerobicaciddigester[J].Wat.Res.,2004,38(9):24162422.[3]VeekenAHM,HamelersBVM.Effectoftemperatureonhydrolysisratesofselectedbiowastecomponents[J].BioresourceTechnol.,1999,69(3):249254.[4]HoriuchiJ,ShimizuT,TadaK,etal.SelectiveproductionoforganicacidsinanaerobicacidreactorbypHcontrol[J].BioresourceTechnol.,2002,82(3):209213.[5],RalfC,.[J].,2001,1(2):180184.[6]Spee