分段组合式厌氧反应器相应指标纵向分布特性的研究季军远

266No.6Vol.26201212JournalofChemicalEngineeringofChineseUniversitiesDec.20121003-9015(2012)06-1066-07,,,(,310058)(CompartmentalizedAnaerobicReactor,CAR)CAR100.5gCOD(Ld)184.4gCOD(Ld)157.0L(Ld)1CAR()327.6221.2153.3gCOD(Ld)1106.467.932.0gCOD(Ld)1CARVFACODVFACODVFAX171.5ADOI10.3969/j.issn.1003-9015.2012.06.027VerticalDistributionofCompartmentalizedAnaerobicReactor(CAR)PerformancesJIJun-yuan,ZHENGPing,ZHANGJi-qiang,ZHANGMeng(DepartmentofEnvironmentalEngineering,ZhejiangUniversity,Hangzhou310058,China)Abstract:TheverticaldistributionofCompartmentalizedAnaerobicReactor(CAR)performanceswasstudiedinalab-scaleexperiment.TheresultsindicatethattheCARhasahighvolumetricefficiency,anditsorganicloadingrate,volumetricCODremovalrateandvolumetricbiogasproductionare100.5gCOD(Ld)1,84.4gCOD(Ld)1and57.0L(Ld)1,respectively.CARshowsanobviousverticaldistributionofvolumetricefficiency,e.g.theorganicloadingrateandvolumetricCODremovalrateofpartI,IIandIII(bottom,middleandtop)oftheCARatthehighloadingrateare327.6,221.2,153.3gCOD(Ld)1and106.4,67.9,32.0gCOD(Ld)1respectively.Comparedwiththatatcommonloadingrates,theverticaldistributionofvolumetricefficiencyathighloadingratesbecomeslessobvious,whichishelpfultohomogenizetheorganicloadingratealongthereactorandexploitthereactionpotentialofthewholereactor.CARalsoshowsanobviousverticaldistributionofsubstrateconcentration.Comparedwiththatatcommonloadingrates,theverticalconcentrationgradientsofVFAandCODaresmallerathighloadingrates,andtheratiosofVFAtoCODinpartI,II,IIIincreasedsignificantly.MoreattentionshouldbepaidtotheseriousinhibitioncausedbyVFAathighloadingrates.Keywords:anaerobicreactor;verticalperformancedistribution;organicloadingrateallocation;volumetricefficiency1[1~5][6](OLR)OLR40gCOD(Ld)12011-05-192012-01-13(2010C13001);863(2009AA06Z311)(1980-)[e-mail]2661067[7~9](CompartmentalizedAnaerobicReactor,CAR)CAR22.1NH4ClNaHCO3(1)I1mLL1NaHCO3pH2.2IC(SS)51.0gL1(VSS)40.3gL1VSS/SS0.722.315cm120cm2L(30±1)2.4COD[11]SSVSS[11]pH[12]BSD-0.533.13.1.1(OLR40gCOD(Ld)1)(HRT)7hCOD(chemicaloxygendemand)2886mgL1HRTCOD2~4COD2886mgL111595mgL19.9gCOD(Ld)139.8gCOD(Ld)19.5gCOD(Ld)139.1gCOD(Ld)14.9L(Ld)119.0L(Ld)1COD96.2%98.4%[13,14]pH1[10]Table1Compositionofnutrientsolution[10]CompoundConcentraion/mgL1CompoundConcentraion/mgL1Yeastextract1200MgSO4220Beefextract1200KH2PO47540Tryptone3600Traceelements(1)CaCl2220Traceelements(2)(1)TraceelementsI(mgL1):EDTA5000,FeSO45000;(2)TraceelementsII(mgL1):EDTA15000,H3BO414,ZnSO4·7H2O430,MnCl2·4H2O990,CuSO4·5H2O250,NaMoO4·2H2O220,NiCl2199,NaSeO4·10H2O210.41Fig.1TheschematicdiagramofCAR1.influenttank2.peristalticpump3.recirculationpump4.CompartmentalizedAnaerobicReactor(CAR)5.biogas6.effluenttank7.wetgasmeter8,9,10.samplingports,,respectively123510986574106820121210152025303540020004000600080001000012000effluentCODinfluentCODremovalefficiency92949698100Organicloadingrate/gCOD(Ld)12CODCODFig.2InfluentandeffluentCODconcentrationandCODremovalefficiencyatcommonloadingrateConcentrationofCOD/mgL1Removalefficiency/%2000400060008000100001200010152025303540organicloadingratevolumetricCODremovalratevolumetricgasproduction48121620ConcentrationofinfluentCOD/mgL13Fig.3Organicloadingrate,volumetricCODremovalrateandvolumetricgasproductionatcommonloadingrateOrganicloadingrateorVolumetricCODremovalrate/gCOD(Ld)1Volumetricgasproduction/7.26~8.00VFA38.6mgL170.9mgL1VFA[15]3.1.2(OLR40gCOD/(L·d)1)HRTCOD5~7COD11595mgL129300mgL139.8gCOD(Ld)1100.5150002000025000300003500045607590105120135organicloadingratevolumetricCODremovalratevolumetricgasproduction203040506070ConcentrationofinfluentCOD/mgL16Fig.6Organicloadingrate,volumetricCODremovalrateandvolumetricgasproductionathighloadingrateVolumetricgasproduction/L(Ld)1OrganicloadingrateorVolumetricCODremovalrate/gCOD(Ld)1150002000025000300007.27.57.88.18.4pHeffluentVFA015003000450060007500VFA/mgL1ConcentrationofinfluentCOD/mgL17pHVFAFig.7EffluentpHandVFAconcentrationathighloadingratepH200040006000800010000120007.27.57.88.18.4pHeffluentVFA304050607080ConcentrationofinfluentCOD/mgL14pHVFAFig.4EffluentpHandVFAconcentrationatcommonloadingrateVFA/mgL1pH506070809010011005000100001500020000250003000035000influentCODeffluentCODremovalefficiency707580859095100Organicloadingrate/gCOD(Ld)15CODCODFig.5InfluentandeffluentCODconcentrationandCODremovalefficiencyathighloadingrateRemovalefficiency/%ConcentrationofCOD/mgL12661069gCOD(Ld)139.1gCOD(Ld)184.4gCOD(Ld)119.0L(Ld)157.0L(Ld)1COD98.4%84.0%pH7.58~8.22VFA70.9mgL13323.7mgL1VFACOD32367mgL1111.0gCOD(Ld)182.2gCOD(Ld)156.5L(Ld)1COD74.1%pH7.01VFA6304.2mgL1VFA100.5gCOD(Ld)13.1.3(OLR=39.8gCOD(Ld)1)39.1gCOD(Ld)119.0L(Ld)1(OLR=100.5gCOD(Ld)1)84.4gCOD(Ld)157.0L(Ld)1(OLR=39.8gCOD(Ld)1)COD184mgL1VFA70.9mgL1(OLR=100.5gCOD(Ld)1)COD4700mgL1VFA3323.7mgL1()2(OLR=9.9~39.8gCOD(Ld)1)COD0.2215.90VFA0.288.95VFACOD(70.9/184=0.39)(OLR=39.8~100.5gCOD(L