常温内源反硝化脱氮过程中pH和ORP变化规律

63Vol.6,No.320053TechniquesandEquipmentforEnvironmentalPollutionControlMar.2005pHORP11132(11,100022;21,100037)SBR,25,NO-32NNO-22N,pHORP,ORP,;pHpH,pH,pH,pH,;pH,pH,,,ORPpHProfilesofpHandORPduringbiologicalnitrogenremovalprocessbyendogenousdenitrificationatnormaltemperatureWangShaopo1WangShuying1PengYongzhen1LiYongzhi2(11KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022;21TheCollegeofChemistryandEnvironmentalEngineering,BeijingTechnologyandBusinessUniversity,Beijing100037)AbstractLaboratoryexperimentswereconductedtostudytherelationshipbetweenpH,ORPandendoge2nousdenitrification.ASBRreactorwasoperatedindenitrificationmodeat25.Inthiswork,itisshownthatORPdecreasedgraduallyduringendogenousdenitrificationandabending2pointappearedontheORPcurvewhendenitrificationstopped.ThereweretwovariationwaysofpHduringendogenousdenitrification.Firstly,ifthevalueofthemaximalpHduringdenitrificationwaslessthan9,pHwillincreaseduntilldenitrificationwasfin2ishedandthendecreasedpresentingaturningpointonthepHcurve.Secondly,ifthedenitrificationwasntfin2ishedwhenthepHwasabove9,pHwouldbecomestablewithafluctuatingvalue.TheresultssuggestthatORPwasamorereliablecontrolparameterthanpHduringendogenousdenitrification.Keywordsbiologicalnitrogenremoval;endogenousdenitrification;pH;oxidationreductionpotential(ORP):(20377003);(KZ200310005003);:2004-06-07;:2004-07-23:(1975),,,E2mail:[e-mail]3,,22,,(NO-2);,(NO-3),,[1,2],,,(N2N2O),3:,,,,转载[3,4]WarehamIbrahim[5,6]pHORP;[79],pHORPSBRpHORPpHORP,11.1,11Table1CharacteristicsofsludgeanditssupernantusedinthelaborataryexperimentpHCODCr(mg/L)NH+42N(mg/L)NO-22N(mg/L)NO-32N(mg/L)TP(mg/L)VSS/MLSS(%)7.37.630400301051370761.28LSBR,7L,;:MLSSNH+42NNO-32NNO-22NCODCr,ORPpH1SBRFig.1Schematicdiagramofexperimentalequipment1.3NH+42N;NO-32N;NO-22NN2(12)2;CODCr5B23;ORPpHWTWMulti340i,MLSSVSS[10]1.41.4.1NO-22NNO-32NpHORPSBR,25,MLSS6500mg/L,(NO-x2N=NO-22N+NO-32N)40mg/L,NO-22NNO-32N,,,5NO-22NNO-32N,:4031221304,NO-x2N:40mg/LNO-22N30mg/LNO-22N+10mg/LNO-32N20mg/LNO-22N+20mg/LNO-32N10mg/LNO-22N+30mg/LNO-32N40mg/LNO-32N1.4.2pHORPSBR,25,MLSS6500mg/L,NO-22N,015mg/L,,,40mg/LpHORP22.1pHORPNO-22N40mg/L,2,3pHORP3,,pH,ORPpH7139(420min)8141,ORP-75mV-229mVpH,,(1)(2),H[11]ORP,12中国科技论文在线=40Fig.2Dynamicsofnitrite,nitrateandammoniaduringendogenousdenitrificationata40ofinitialNO-22NNO-32N3NO-22NNO-32N=4:0pHORPFig.3ChangesofpHandORPduringendogenousdenitrificationata40ofinitialNO-22NNO-32N,NO-x,ORP,,,,pH,pH(B),NO-x2N,,ORP,ORP(C)BC2A,BC,dpH/dt(),dORP/dt,45,pHORP,pH4dpH/dtFig.4ChangesofdpH/dtduringendogenousdenitrification5dORP/dtFig.5ChangesofdORP/dtduringendogenousdenitrificationORPNO-2+3H1/2N2+H2O+OH-(1)NO-3+5H1/2N2+H2O+OH-(2)2.2NO-22NNO-32NpHORP6NO-22NNO-32NpHORP,ABCDENO-22N:NO-32N4031221304pHORP,,NO-22NNO-32N,pHORP,pHORP,6a6b,NO-22NNO-32N,pHORP,pH,NO-22N,22中国科技论文在线(a)pH(b)ORP6NO-22N:NO-32NpHORPFig.6ChangesofpHandORPduringendogenousdenitrificationatdifferentinitialNO-22NNO-32NpHNO-22NNO-32N,NO-22N01032gN/gVSSd,NO-32N01020gN/gVSSd,115,,NO-22N,NO-32N,NO-22NNO-32N4031221304,365min410min440min520min565min,NO-x2NNO-22N,,,pH;,NO-22N,NO-x2N,ORP,,ORP-160,,NO-32N,,,pH,NO-32N,pH,,pHORPNO-22NNO-32N2.3pHORP78pHORP,,8pH,,NO-x2N,,pH,pHORP,,pH,,,7,68h80h,pH,pH,,pH9,,pH911ORP,pH:(1)pH(pH9),,;(2),,,78pHORPFig.7ChangesofpHandORPduringeightcyclesofendogenousdenitrification32中国科技论文在线(HCO-3)(CO2-3),HCO-3/CO2-3,,,,pHpHORP,,pH,ORP,,,Na2CO3pH9,,,pHORP,pH,pH,pH,pH,ORPpH,,ORP3(1)pH,pH,,,;ORP,,,ORP(2)pH,pH,ORP(3)(NO-x2N),NO-22N,,pH,ORP,pHORPNO-22NNO-32N[1],..,1997,19(4):2528[2]..:,1989.1516[3]Kuo2ChengChen,etal.Real2timecontrolofanimmobi2lized2cellreactorforwastewatertreatmentusingORP.Wa2terResearch,2002,36(1):230238[4]E.Paul,etal.Processstateevaluationofalternatingoxic2anoxicactivatedsludgeusingORP,pHandDO.WaterScienceandTechnology,1998,38(3):299306[5]WarehamDavidG.,etal.SludgedigestionusingORP2regulatedaerobic2anoxiccycles.WaterResearch,1994,28(2):373384[6]IbrahimAl2Ghusain,etal.Useofphascontrolparameterforaerobic/anoxicsludgedigestion.JournalofEnvironmen2talEngineering,1995,121(3):225235[7],.DOORPpHSBR.,2001,17(4):611[8],,.SBRpHORP.,2002,23(1):3944[9],,.SBR.,2003,23(6):732737[10].(3)1:,1997[11],..:,19981505142中国科技论文在线