表征发酵产氢活性污泥效能的碘硝基四唑紫比脱氢酶活性及其检测

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AbstractTheratiobetweenMixedLiquorVolatileSuspendedSolid(MLVSS)andMixedLiquorSuspendedSolid(MLSS),thespecifichydrogenproducingratebyMLVSSandtheCODremovalratearenormallyusedtoevaluatethehydrogen-productionefficiencyofanaerobicactivatedsludgeinfermentationprocesses,buttheysufferfromsomedrawbacks.Inordertoevaluatethehydrogen-productionefficiencyofanaerobicactivatedsludgeinfermentationprocesses,adetectionmethodusingiodonitrotetrazoliumchloride(INT)isproposedandoptimizedfordetectingthespecificdehydrogenaseactivityintheflocs.Thecorrelationbetweendehydrogenaseactivityandthespecifichydrogenproductionrateoftheactivatedsludgeisanalyzed.TheresultsshowthattheoptimalconditionsfordetectingINT-dehydrogenaseactivityareasfollows.A2.8mLreactionsystem,including0.3mLsludgesamplewithamixedliquorvolatilesuspendedsolidsof3.5~12.5g/L,1mL19.8μmol/LINTand1.5mLsodiumacetatebufferwithapHof5,isputindarkfor30minunder45℃withoscillation.Concentratedsulfuricacidof98%isusedasthereactionterminationagent,whiletheanhydrousethanolisusedastheextractionsolvent.Theabsorbanceismeasuredat438nm.Thedehydrogenaseactivityoftheactivatedsludgeisveryhighlycorrelatedwithitsspecifichydrogenproductionrate,excellentlyreflectingthehydrogen-producingactivity.Keywordsbio-hydrogen;fermentation;anaerobicactivatedsludge;dehydrogenase;iodonitrotetrazoliumchloride0,(MixedLiquorVolatileSuspendedSolids,MLVSS)(MixedLiquorSuspendedSolids,MLSS)(MLVSS/MLSS)、(MLVSS)()(L/(g·d))、COD(%):2009-06-22:(863)(2006AA05Z109);(2009RFXXS004):,,,:ljz6677@163.com-,,,;,150090,,(MLVSS)(MLSS)(MLVSS/MLSS)、MLVSS()COD,。,(INT),,INT-,。,INT-:10mL,0.3mL、19.8mmol/LINT1mL、pH51.5mL,45℃30min;98%,,438nm;(MLVSS,)3.5~12.5g/L。INT-,。;;;;X382A1000-7857(2009)15-0104-05DetectionofSpecificDehydrogenaseActivityforEvaluatingtheHydrogen-producingActivityofFlocsinAnaerobicFermentationProcessLIJianzheng,WANGShuo,ZHENGGuochen,JIANGFanStateKeyLaboratoryofUrbanWaterResourceandEnvironment;HarbinInstituteofTechnology,Harbin150090,China(Articles)1042009,27(15)[1-2]。MLVSS,,,MLVSS/MLSS[3],()[4]。,(VFAs)(H2CO2),,COD,,。,COD[5-6]。,[7-9]。,(DHA)(TTC)(iodonitrotetrazoliumchloride,INT)[10-11]。TTC(ORP)+490mV,INTORP+90mV,INTTTC[12-13]。,ORP,INTDHA,。INTDHA[14],INT[15],,。,DHAINT、pH、、、,,,,。11.1(ABR)[16],,。、、、、、、、、、98%,;SearchbioINT(99%),1%(1.98mol/L);(pH4)、(pH5)、(pH6、7)、Tris-HCl(pH8、8.5)(pH9),[17]。752(),1cm、5cm。:THZ-82()、FAN2004(Hangping)、SPX1508()TGL-16G-B()。1.2pH、MLVSS,[18]。DHA,,,,。:10mL0.3mL(2.7gMLVSS)、1.5mLTris-HCl(pH8.4)1mL0.1%INT,37℃,30min,1mL37%;5000r/min5min,,5mL,,37℃10min(INF,);5000r/min5min,485nm[19]。:UI=AVKWt(1),UIINT-(μmol/(g·min)),A,V(mL),KINT-A,WMLVSS(mg),t(min)。INT-A,K。22.1DHA2.1.1,420~500nm[19]。,438nm,INF()A,0.64。INF。2.1.2,INT-INT、、(1)。,①INT0.01%(19.8mmol/L)0.1%(198mmol/L),A0.180.51;INT0.8%,A0.17,。②10min30min,A0.140.25,,A。③[20-21],DHA,25℃45℃,A0.200.37(1);,A。④(1.5mL),pH5,A,0.58;,A,0.28。,INT-INT(Articles)2009,27(15)105、、198mmol/L、30min、45℃pH5。2.1.3DHA,,。30min,、、4(1),4,5min10min,A。INFA,3,A0.42,3A0.28。2.1.4INF,,、、、、、7(2)。,,A,0.53,A。,。2.2INT-AUIINT-,INT-A:1%INT,pH598,198,395,790,1581mmol/L,7%0.2mL,,45℃30min,1mL;5000r/min5min,,5mL,45℃10min,5000r/min5min,438nmA,INT-A(3),y=0.0111x-0.0456(2),xINF(μmol/L),yA。xy,R20.9952。(2)K=0.0111,(1)UI:UI=15.15AWμmol/(g·min)(3)1INT、、Table1ImpactofINTconcentration,darkreactiontime,temperatureandbuffersonabsorbanceoftheextractionliquidINTpH/%A/minA/℃A/mLA0.010.050.10.20.40.8—0.180.410.510.550.610.68—1020304050——0.120.180.240.250.27——253540455565—0.190.250.360.370.360.28—4a5b6c7c8d8.5d9e0.280.580.130.170.180.170.20:a:,b:,c:,d:Tris-HCI,e:。Notes:a:C8H5KO4,b:CH3COONa,c:KH2PO4andNaH2PO4,d:Tris-HCI,e:Na2B4O7.1Fig.1Effectsofterminationagentsonabsorbanceoftheextractionliquid2Fig.2Effectsofextractantsonabsorbanceoftheextractionliquid(Articles)1062009,27(15)31),INT-,10mL,0.3mL、1mL198mmol/LINT、1.5mLpH5,45℃30min;98%,;752438nm。2)、INT-,:UI=15.15AWμmol/(g·min),MLVSS3.5~12.5g/L。3)INT-,。2.3ABR,()。10mL0.3mL(MLVSS:2.66~26.64g/L)、1.5mL(pH5)、1mL0.1%INT;45℃30min,1mL;5000r/min5min,,5mL,,45℃10min,INF;5000r/min5min,438nmA。,A,-A(4)。,MLVSS2.66~26.64g/L,A,R20.9939,INT。,A0.2~0.7,4,MLVSS3.5~12.5g/L。,MLVSS9g/L。2.4INT-ABRHRT30h、COD8000mg/L,INT-,2(11)。MicrosoftExcelCorrelINT-,0.920.94,0.8,INT-。,INT-,。3INT-AFig.3StandardcurveofINTconcentrationandabsorbanceoftheextractionliquid4INFFig.4Relationshipbetweensludgeconcentrationofdetectedsampleandabsorbanceoftheextractionliquid2ABRINT-Table2SpecifichydrogenproductionrateandspecificdehydrogenaseactivityoftheactivatedsludgeinanABR135791/mol·kg-1·d-1INT-/μmol·g-1·min-12.8426.32.7626.22.9327.50.9199772.6825.82.7126.12/mol·kg-1·d-1INT-/μmol·g-1·min-12.0321.311.9520.482.0221.260.9435392.1121.482.1521.87(Articles)2009,27(15)107(References)[1]YangH,JiangZ,ShiS,etal.INT-dehydrogenaseactivitytestforassessinganaerobicbiodegradabilityoforganiccompounds[J].EcotoxicologyandEnvironmentalSafety,2002,53:416-421.[2]Liwarska-BizukojcE,LedakowiczS.Estimationofviablebiomassinaerobicbiodegradationprocessesoforganicfractionofmunicipalsolidwaste(MSW)[J].JournalofBiotechnology,2003,101(1):165-172.[3]CaravelliA,Gi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