搜索
1998,18(3):218222ChinaEnvironmentalScience(,210096)(,)25pH,(ActiveBiologicalSolids),,,150,1230,S,Moser;n=2Theanalysisoftheretentiontimeintheprocessofthenormaltemperatureanaerobicsludgedigestion.WangShihe(De2partmentofEnvironmentalEngineering,SoutheastUniversity,Nanjing210096);IkuoEndo(WASEDAUniversity,Japan).ChinaEnvironmentalScience.1998,18(3):218222AbstractInthispaper,theconceptofActiveBiologicalSolidswasintroducedandtheanalysisofkineticsinthepro2cessofnormaltemperatureanaerobicdigestionwascarriedoutbymeansofmeasuringtherateofgasproduction,pH,thevolatileacid,thedegradationrateoforganicmatterandthedigestionspeedconstantintheprocessofurbansludgeanaero2bicdigestionin25.Theresultsdemonstratethatthereactionspeed,therateofgasproductionandthedegradationrateoforganicmatterinnormaltemperaturedigestionareobviouslylowerthanthoseinhighormiddletemperature.Toreachthesamedegreeintherateofgasproductionanddegradationrateoforganicmatter,theretentiontimefornormaltemper2aturedigestionneedsmorethan150days,whileonly12to30daysrequiredforhighormiddletemperaturedigestion.Therelationshipbetweenthesubstrateconcentrationandthedigestionspeedintheprocessofnormaltemperaturesludgediges2tiontakesonthestyleofanS,whichdiffersfromthatofthesyntheticsubstrates.ItskineticscanbesimulatedwithMosermodel.Whennis2,severalkineticconstantsandtheminimumdigestiontimecanbeusedforthecontrolofnomaltemperatureanaerobicdigestion.Keywords:anaerobicsludgedigestionmethanefermentationsludgetreatmentanddisposal1,70,,,,,,MLVSS1,,TSSS84.5%88.4%;,21%23%,77%79%,SS,SS,,,MLVSS1:19972052281,14250.2,8101215202530406080100120150200:8803.0L,2.4L;1002005L,4L1,1,8:pH5.93,CODCr31548mg/L,BOD512843mg/L,VFA1412mg/L,TS22424mg/L,VS18383mg/L,SS19561mg/L,VSS16675mg/L,T2N835mg/L10,pH(VFA)BOD5CODCrMLVSS,3(1)1Fig.1IllustrationofthedigestionunitA.BC.D.E.F.G.1Table1Averageresultsmeasuredintheexperiments(d)(mL/d)pHBOD(mg/L)BOD(mg/L)CODCr(mg/L)VFA(mg/L)TS(mg/L)VS(mg/L)SS(mg/L)VSS(mg/L)823916.7556441386173091192.015852111981318698071021096.84369490714744376.01378591201141280671218776.87302272714956749.21284685701093075981512376.85277154216161267.816702101251364993892011596.94230149213449564.7128838349107607293259456.97225646713488536.6130258309108137226306416.94211344615627280.4142499250125208354404616.97198441913443419.013774878.2121327996603267.02171334213050496.6134878471117087543802477.07179332112024455.01310481871124472341003877.07169938912289342.21335082381126971061203347.11152041012888377.81300979561099270191502737.17153935812523339.81289377951088468752002167.20145534212407412.312699778910500653322,(53)(37)2,1230,600630mL/gVS,12200,465630mL/gVS,,150,pH7.0403,55%63%,830,40,150200(55%),9123:50%,60;55%,12,150,3046%,(55%)84%;90%,60,50.5%2pHFig.2Therelationshipbetweentheamountofgasproduction,pHandratentiontime3Fig.3Therelationshipbetweenthedegradetionrateoftheorganicmatter44,,S,BOD52050mg/L,Monod,,Moser13,,1QX0,S0V,X,SQX,S,Rv=QS0V=S0t(1)=S0-SS0=1-SS0(2)Rs=Rv=S0-St(3):X0X;S0S;Q;V;t:tdXdt=X0+YRst-KdXt-X(4):Kd(dX/dt)=-KdX(5)Y:Y=MLVSSBOD5CODCr(6),X0=0;dX/dt=0,(4):X=RstY1+Kdt(7)4Fig.4Therelationshipbetweensubstratedegestionspeedandsubstrateconcentration:RsX=1Y1t+KdY(8)Rs/X1t(5),(8)Y=1.51,Kd=0.0442(6),(6),Y=1.5(VS/TS=0.82,r=0.934)Y,02218YBOD=0.096mgVSS/mgBOD5(YCODCr·0.057mgVSS/mgCODCr),,16.2,5Rs/X1/tFig.5TherelationshipbetweenRs/Xand1/t6(6)BOD5VSSFig.6TherelationshipbetweenBOD5andVSSderivedfromequation(6):Rm=KX(9):K,Moser:K=KmSnKs+Sn(10):Km;KsMosern=1,(10)Monod,KsMonod:Y=RmRs(11)(9)(10):Rs=KXY=XYKmSnKs+Sn(12):XRs=YKm+YKmKs(1S)n(13)4SRsS,(13)n1.0,1,,n=2,Y,n(13),X/Rs(1/S)2(7),MoserKm=0.278,Ks=(3618)2,(10):K=0.278S236182+S2(14)7X/Rs(1/S)2Fig.7TherelationshipbetweenXRsand(1S)28n=2MoserFig.8TherelationshipdiagramsforMosermodelwhennis28(14)SK,30,(14):S=(n-1n+1Ks)1/n=2088mgBOD/L(15)4,Mosern=2D=1/t,Dmtmin(3)(7),:X(D+Kd)=YD(S0-S)(16)1223:(12)(8),:S=Ks(D+Kd)Km-(D+Kd)1n(17)(16):X(D+Kd)=DYS0-Ks(D+Kd)Km-(D+Kd)1n5(18)(18)D:S0-Ks(Dm+Kd)Km-(Dm+Kd)1n-DmKsKmn1Km-(Dm+Kd)2Ks(Dm+Kd)Km-(Dm+Kd)=1/(n-1)=0(19)Dm=0.1497d-1,tmin=1/Dm=6.677(d)8pH=6.8,47.8%,,(VFA=1192.0mg/L),10VFA,,331125,,(600630mL/gVS)(55%),150,1230312,S,Mosern=2,Y=1.51mgMLSS/mgBOD,Kd=0.04421/d,Km=0.2761/d,Ks=(3618)2(mgBOD/L)2,tmin=7d,3.3,,,,,,1,.()49,1994,92..,1992,29(339):82923PavlotathisSG,GossettJM.Kineticsmodelforanaerobicdi2gestionofbiologicalsludge.BiotechandBioeng,1996,28:15191530,1945114,1,54022218