餐厨垃圾厌氧消化水解机理及动力学模型研究-(1)

©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:(No.2003BA808A17202203)SupportedbytheKeyProjectofNationalTheTenthFive2YearPlan(No.2003BA808A17202203):(1973),,,E2mail:[e-mail];3(),E2mail:[e-mail]:WUYun(1973),Ph.D.candidate,E2mail:[e-mail];3Correspondingauthor,E2mail:[e-mail],,.2010.[J].,30(1):142-147WuY,ZhangDJ,YangG.2010.Themechanismandkineticsofhydrolysisintheanaerobicdigestionofkitchenwastes[J].ActaScientiaeCircumstantiae,30(1):142-1471,1,3,21.,4000442.,400067:2009204203:2009207211:2009210227:,.,,,.(20mm40mm60mm)1.422.122.78.,,.,,.:;;;;:025322468(2010)012142206:X705:AThemechanismandkineticsofhydrolysisintheanaerobicdigestionofkitchenwastesWUYun1,ZHANGDaijun1,3,YANGGang21.ResourceandEnvironmentScienceCollege,ChongqingUniversity,Chongqing4000442.DepartmentofGeography,ChongqingEducationCollege,Chongqing400067Received3April2009;receivedinrevisedform11July2009;accepted27October2009Abstract:Theprofileofhydrolysatesproducedduringtheanaerobicdigestionofkitchenwasteswasinvestigatedexperimentallyandtheoretically.Theexperimentalresultsshowedthatthehysteresisofthehydrolysisratewasmainlycontrolledbythediffusioneffect.Thehydrolyticmechanismofkitchenwastesiselaboratedtakingthediffusioneffectintoconsideration.Apartitioningmodelofthehydrolysisofkitchenwasteisformulatedincludingthecoefficientofdiffusionresistanceinthemodel.Thecoefficientsofdiffusionresistancefordifferentparticlesizes(20mm,40mm,60mm)are1.42,2.12,and2.78basedontheexperimentaldata,inwhichthecoefficientofdiffusionresistancevs.particlesizeconformstoanexponentialfunction.So,thepartitioningkineticmodelcouldbeintegratedasaunifiedexperiencemodel.Verificationofthemodelbycomparisonwiththeexperimentaldatashowedthatthemodelcouldpredicttheconcentrationoforganicsubstancesduringtheanaerobicdigestionofkitchenwastes.Keywords:kitchenwastes;anaerobicdigestion;hydrolysis;kineticmodel;diffusionresistance1(Introduction),.,.,,,.,MonodContois.,Valentini(1997)Borja(2005),Monod,;Contois(Fangetal.,2002;Yuetal.,2003;Songetal.,2004);,©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2007);(Raoetal.,2004;Borjaetal.,2005),,,(Eastmanetal.,1981),(Vavilinetal.,1996;Kielyetal.,1997).,,,,,.2(Studyonhydrolysismechanism)2.1,,,,(Palmowskietal.,2000).,(2007),,,,10mm20mm,4,.,,,,,,,,..2.2,,,,A=4r2,m=43r3,,n=Mm,M,As=4nr2=3Mr3r2=3Mr.,,,,,M1M2=r1r2.,,.,,.:800mL3,3:1020mm2030mm4050mm.400g(4050mm)200g(2030mm)100g(1020mm),40mL20mL10mL.,1,./11,pH7,,CODVFA,CODVFA,8d,COD,VFA,.2.1Table1CharacteristicsofkitchenwastesTS90.72%3.41%0.31%5.24%0.015%0.12%0.18%13.03%92.41%2Table2Experimentalresultsofdifferentgranularitykitchenwaste/mm/gVFA/dCOD/dVFA/(mgd-1)COD/(mgd-1)40504005493329472030200431248335310201003212243712341©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:.,,,,;,,,;,;,,.3(Modeling),,,.,,E,,,,,,,1(,2000),,E=1/E.,,,.,,E1,,,,,(2007).,:dSdt=-kS/E(1)dSdt=-kS2n-1nSn-1n0(2)(1),St(gL-1),E,,E1,,E1,(1)(2).(2)n=1,2,3,n=1,;n=2;n=3,St(gL-1),S0(gL-1).4(Experimentsection)4.1.,,::0.65:0.30:0.05(),4.10mm20mm40mm60mm4,.3.441©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(gL-1)1086.97%92.41%24.082086.61%92.16%24.684087.21%92.68%23.716087.10%92.55%23.8832500mL81,200g(),200mLUASB,8d,.1d,1#,,2d2#,,,.:;103105;VS600.4.24.4Table4Experimentalresultsofdifferentgranularitykitchenwastes/mm/d/g/(gL-1)/mm/d/g/(gL-1)101201.222.382199.520.273200.818.374200.516.675202.315.766200.215.147200.414.718200.614.45201200.323.422201.421.863200.820.034200.618.315201.316.926200.415.827200.515.208200.814.83401200.822.792200.221.823201.820.724201.219.875200.617.956200.716.457200.915.808200.615.37601200.423.182200.122.423200.321.694201.520.865200.320.146201.218.347200.416.698200.315.771.1Fig.1Hydrolysisgraphofdifferentgranularitykitchenwastes5(Applicationandverification)5.12,,.,,.,10mm,,,E1;,,(1),20mm40mm60mmk/E,,k,,10mmk/E,..541©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a.10mm;b.20mm;c.40mm;d.60mm)Fig.2Plotofhydrolyticconstantofdifferentparticulates(a.10mmParticulate;b.20mmParticulate;c.40mmParticulate;d.60mmParticulate),k/E0.09820.06890.04630.0353d-1,10mm,,10mm1,,31.4221122178.,2b20mm,,2d,2d,2d,.3Fig.3Diffusionresistancecoefficientvs.granularityratio,20mm,0.52.0310,(3),ERR0,R;R0,E.,,.,,.(1)(2)(3):dSdt=-kS2n-1nSn-1n0ERR0t(3),R;R0,,,20mm;t;E.(2007),,n=2.:dSdt=-kS32S120ERR0t(4)5.2(4)VB,,,.4.,.641©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Analysisanddiscussion),,,,1.422.122.78,k/E0.06890.04630.0353d-1,(0.010.2d-1).,,,.7(Conclusions)1)..2)20mm40mm60mm1.422.122.78,.3),.,,.:(1963),,,,.130.(References):BorjaR,MartinA