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SBR1,2(1., 200092;2., 210096):NO-3-NCOD0.04、0.095、0.1250.27,SBR.,(pH、ORP、DO).,ORP;,3TN(NASpoint),pH.NASpoint,.,(DPBs)NO-3-N,N2.DPBs,NO-3-NCOD0.095,,DPBs.,,NO-3-NCOD0.125.:;;;NO-3-NCOD;:X703.1 :A :0250-3301(2007)10-2259-05:2006-10-11;:2007-01-04:(BE2001035):(1981～),,,,E-mail:zhangchao-seu@163.comCharacteristicsofDenitrifyingPhosphorusRemovalbySequencingBatchReactorZHANGChao1,LXi-wu2(1.StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China;2.CollegeofEnergyandEnvironment,SoutheastUniversity,Nanjing210096,China)Abstract:Thecharacteristicsofdenitrifyingphosphorusremovalwerestudiedinalaboratorysequencingbatchreactor(SBR)atNO-3-NtoCODratio(NO-3-NCOD)of0.04,0.095,0.125and0.27,respectively.Experimentsshowedthatthetransformationsofpollutantscorrelatedwelltocontrolparameters(i.e.pH,ORPandDO).Inblendingphase,thereactionofdenitrifyingphosphorusremovalcouldbeindicatedbyORP,andinoxidationphaseavalleyconcentrationofTNcalledNASpointcouldbemonitoredbyallthethreeparameters,amongwhichpHwasthemostsensitiveparameter.BothreactorefficiencyandeffluentqualitywouldbeimprovedwhensupernatantwasdischargedatNASpoint.Indenitrifyingphosphorusremovalprocess,NO-3-NwasquicklytransformedintointermediateproductsfirstlyandthengraduallyintoN2bydenitrifyingP-bacteria(DPBs).CarbonsourcehadasignificantinfluenceonphosphorusremovalcapabilityofDPBs.WhenNO-3-NCODratiowashigherthan0.095,phosphorusremovalcapabilityofDPBsenhancedwiththeincreaseoftheratio.ResultsindicatedthatNO-3-NCODratioshouldnotbelowerthan0.125forafavorabledenitrifyingphosphorusremovaleffect.Keywords:denitrifyingphosphorusremoval;controlparameters;nitrogenvalley;NO-3-NCOD;phosphorusremovalcapability ,,.,[1,2],(denitrifyingP-bacteria,DPBs),[3～6].DPBs,N2,2,.NO-3-NDPBs,DPBs.SBR,DO(dissolvedoxygen)、pH、ORP(oxidation-reductionpotential),[7～9],DPBsSBR[10].NO-3-NCOD,,NO-3-N.1 1.1 [11].,12L,18LSBR(2.5h2.5h1h),6L,3300mgL.1.2810200710 ENVIRONMENTALSCIENCEVol.28,No.10Oct.,2007DOI:10.13227/j.hjkx.2007.10.0191 Fig.1 SchematicdiagramofSBRsystem 1.2 28℃±2℃.(Ⅰ),NO-3-N、TP、pH、ORP、DO.Ⅰ,Ⅱ,pH、ORP,.,KNO3NO-3-N,NH4Cl、KH2HPO4、.1.1 mg·L-1Table1 Characteristicsofinfluentmg·L-1NH+4-NTNTPCODSBRNO-3-NSBRNO-3-NCODⅠ23.424.23.57210.613.250.125Ⅱ-A36.837.26.07318.55.780.04Ⅱ-B35.436.86.11309.314.550.095Ⅱ-C36.337.46.30109.414.930.271.3 NH+4-N:;TN:-;NO-2-N:N-(1-)-;NO-3-N:;TP:;COD:;DO:(DO-24P);ORP:(HM-21P);pH:pH(HM-21P).2 2.1 Ⅰ2.1.1 Ⅰ2,0～5min,NO-3-N0.5mgL,NO-3-NTN.,,NO-3-N,[12～14].v=0.03mg(L·min)(0～120min)v=0.016mg(L·min)(120～150min),TP1.93mgL.2 ⅠFig.2 VariationofpollutantsinexperimentⅠ 5minTNNH+4-N,.NO-3-N(5min),20min,.2,,,2NO-3-N,NO-2-N,NO-3-NNO-2-N,.,DPBsNO-3-NN2,NO-3-N,O2,N2.,NH+4-N30min0.51mgL;NO-3-N,1h,.TN,,NO-3-N.Charpentier[15,16],TN2260 28nitrogenactivatedsludgepoint(NASpoint)“NitrogenValley”.,,NO-3-N,.NH+4-N[11],(30min0.16mgL),,.2.1.2 ORP、DOpH(1)ORP ORP(),(),[17].ORP1(0～5min),1(5～25min),1.ORP,NO-3-N0～5min,NO-3-N,NO-3-N.,ORP、,DPBs(2).Charpentier[15]ORP(),ORP().DPBs,ORP,TP.NO-3-N,ORP,ORPTP.DPBs[8,18,19],ORP3:ACOD,;BNH+4-N,;C,SBR.BNASpoint,ORP.(2)DOpH ,DO,.DOORP3,[18].pHTN,1.NH+4-N,pH;NH+4-N、NO-3-N,pH;BNASpoint,.B30min,.①ORP、DO,[19];②pHTN;③pH,dpHdt,;,ORP、DO,pH.2.2 ⅡNO-3-NCOD,2.1.1NO-3-NORPTP,Ⅱ.pH,pH(3B),30min,.4～6.3 ⅠpH、ORP、DOFig.3 VariationofpH,ORPandDOinexperimentⅠ 4 Ⅱ-AFig.4 VariationofpollutantsinexperimentⅡ-A 4,NO-3-NCOD0.04,,,,,,30min,,1.ORP,ORP[15],Ⅱ-BORP,.,,60min.,226110:SBR5 Ⅱ-BFig.5 VariationofpollutantsinexperimentⅡ-B 6 Ⅱ-CFig.6 VariationofpollutantsinexperimentⅡ-C NO-3-N、,.5,NO-3-NCOD0.095,,.60minSBR,60min,NO-3-N,0.50mgL,DPBsNO-3-N,NO-3-NN2,2.1.1.,DPBs0～60min60%,,DPBs,TP1.71mgL2.69mgL.6,NO-3-NCOD0.27,,DPBsNO-3-N,5minTP3.12mgL0.51mgL,1h0.21mgL;5minNO-3-N,15minSBR.NO-3-NCOD,DPBsNO-3-NN2,.2.3 Ⅰ、Ⅱ7,(NO-3-NCOD=0.04),ORP.0.095,0～60min,ORP;60min,,TP,ORP.0.27,ORP,A、B,CORP(A、B-90mV,C44mV),ORPORP,30min,ORP.A、B-90mV,,CORP.ⅠⅡ,DPBs,ORP1;,ORP.ORP,;ORP,.,ORP.7 Ⅱ-A、B、CORPFig.7 VariationofORPinexperimentsⅡ-A,BandC 4NO-3-NCOD,0.04,;0.095,;0.125,,;0.27,DPBs5min,TP0.20mgL.,,.,0.27、0.1250.0953NO-3-N,,,,,.,NO-3-NCOD0.125.2262 28,[20],NO-3-N,15～50min,NO-3-NN2,,TNNH+4-N,NO-3-N.NO-3-N,NO-3-NCOD(0.125),.2～5,,TN1,,TP0.3mgL,pH,,.3 (1)pH、ORP、DO.,ORP;TN1,pH、ORP、DOTN(NASpoint),pH.NASpoint,.(2)NO-3-N.NO-3-N,,,N2.(3)NO-3-NCOD0.04;NO-3-NCOD0.095,.,DPBs,,,NO-3-NCOD0.125.:[1]BakerPS,DoldPL.Denitrificationbehaviorinbiologicalexcessphosphorusremovalactivatedsludgesystem[J].WaterRes,1996,30(4):769～780.[2]KubaT,vanLoosdrechtMCM,BrandseFA,etal.OccurrenceofdenitrifyingphosphorusremovingbacteriainmodifiedUCT-typewastewatertreatmentplants[J].WaterRes,1997,31(4):777～786.[3],,,. [J].,2004,32(7):933～938.[4]vanLoosdrechtMCM,BrandseFA,deVriesAC.Upgradingofwastewatertreatmentprocessesforintegratednutrientremoval-theBCFSprocess[J].WaterSciTechnol,1998,37(9):209～217.[5]KubaT,vanLoosdrechtMCM,HeijnenJJ.PhosphorusandnitrogenremovalwithminimalCODrequirementbyintegrationofdenitrifyingdephosphatationandnitrificationinatwo-sludgesystem[J].WaterRes,1996,30(7):1702～1710.[6],,,.[J].,2003,29(8):33～35.[7]KimJH