SBR工艺交替硝化反硝化运行方式的可行性研究曾薇

:0253-2468(2004)04-0576-05　　　:X703　　　:ASBR曾　薇,彭永臻,王淑莹　(,　100022):、(SBR),.:,;,,,.13,,.13,,,.:;;SBR;Processevaluationofalternatingaerobic-anoxicprocessappliedinSBRfornitrogenremovalZENGWei,PENGYongzhen,WANGShuying　(DepartmentofEnvironmentalEngineering,BeijingUniversityofTechnology,Beijing　100022)Abstract:Feasibilityofalternatingaerobic-anoxicprocess(AAAprocess)appliedinSBRsystemfornitrogenremovalwasinvestigated.Underthesufficientinfluentalkalinity,AAAprocessdidnothaveanadvantageoveroneaerobic-anoxic(OAA)cycleontreatmentefficiencybecausemicroorganismhadanadaptivestageatalternatingaerobic-anoxictransition,whichwouldprolongthetotalcyclingtime.Onthecontrary,AAAprocessmadesystemcontrolmorecomplicated.Underthedeficientinfluentalkalinity,whencomparedtoOAA,AAAprocessimprovedtreatmentefficiencyandeffluentquality,andNH+4-Nineffluentreachedthedetectionlimitation.Inthenitrification,theaveragestoichiometrybetweenalkalinityconsumptionandammoniaoxidationiscalculatedtobe7.07mgCaCO3mgNH+4-N.Inthedenitrification,theaveragestoichiometrybetweenalkalinityproductionandNO-3-Nreductionisabout3.57mgCaCO3mgNO-3-N.Asaresult,halfofthealkalinitypreviouslyconsumedduringtheaerobicnitrificationcanberecoveredduringthesubsequentanoxicdenitrificationperiod.ThatwaswhythehighertreatmentefficiencyinAAAprocesswasobtainedwithoutthesupplementofbicarbonatealkalinity.Ifthelackofalkalinityininfluentwaslessthan13ofthatneeded,thereisnoneedforexternalalkalinityadditionandtreatmentefficiencywassameasthatunderthesufficientinfluentalkalinity.Evenifthelackofalkalinityininfluentwasmorethan13ofthatneeded,AAAprocesswasanoptimalstrategybecauseitreducedtheexternalalkalinityadditionandsavedtheoperationalcost.Keywords:alternatingaerobic-anoxicprocess(AAA);oneaerobic-anoxicprocess(OAA);SBR;alkalinity:2003-09-11;:2003-12-18:“863”(2003AA601010,2003A06);(50138010):　(1974—),,(),[e-mail],、,,,,[1～3].(SBR),[4,5].SBR,,、24420047　　　　　ACTASCIENTIAECIRCUMSTANTIAEVol.24,No.4July,2004DOI:10.13671/j.hjkxxb.2004.04.003,,、,.,,,,.,,.,,,,.,.1　1.1　,、.,NaOHpH.,NH4Cl(50～150mg·L-1),NaHCO3.CaCO3,200～750mg·L-1.1.2　1.;2.;3.;4.;5.ORP;6.;7.;8.;9.;10.;11.;12.;13.1　SBRFig.1　SBRexperimentalsystemSBR1,38L..,DO.,、.,、、、、N2(3min)、、.,.,、、N2(3min)、、.、DO、ORP、pH.1.3　YSIMODEL52BYSI5739DO,pHS-3CE414-QORPORP.、、、(CaCO3)、CODMLSS.2　2.1　:2,COD110mg·L-1、90mg·L-1、750mg·L-1;COD110mg·L-1、65mg·L-1、550mg·L-1.HCO-3..MLSS3000～3100mg·L-1,28～30℃.2.2,,.,,5774　:SBR2　(COD110mg·L-1)Fig.2　Nitrification-denitrificationresults(influentCDD110mg·L-1)SBR,,.,,、,.,,,.2,(νN),(νDN)1.1　Table1　ComparisonofreactionratesNH+4-NνNd-1νDNd-1νN1d-1νDN1d-1νN2d-1νDN2d-190mg·L-10.31.050.271.080.320.9465mg·L-10.261.00.270.960.250.98　　:νN1,νDN1:,;νN2,νDN2:,　　1,、、,,,.2.2　:COD110mg·L-1、93mg·L-1、525mg·L-1.3:(3a),,(1),NH+4+1.86O2+1.98HCO-3(0.0181+0.0025)C5H7O2N+1.04H2O+0.98NO-3+1.88H2CO3(1)578　　　　　　　　　　241mg·L-1,7.07mg·L-1.,658mg·L-1,525mg·L-1,;(3b),NaHCO3,750mg·L-1,HCO-3;(3c),NaHCO3,525mg·L-1.,MLSS3000～3100mg·L-1,28～30℃.3.3　Fig.3　Comparisonsamongexperimentsatdifferentsituations3a:3b、3c,,120min,26mg·L-1.3bNaHCO3,,.3c,,,3b.3c3a,,3c3a.3c3b,,3bNaHCO3,3cNaHCO3,3c3b.3cHCO-34,,.(2):NO-3+5H(———)※12N2+H2O+OH-(2)4　HCO-3Fig.4　HCO-3variationatalternatingaerobic-anoxic,1mg·L-13.57mg·L-1,(1),1mg·L-1,7.07mg·L-1.(1)(2)(4).,.3cNaHCO3,.,.,(1),1mg·L-17.07mg·L-1,.,.(5794　:SBR×7.07)13,,HCO-3,.13,.AO,AO.SBR,AO.,,SBR,,HCO-3,.3　,1mg·L-17.07mg·L-1.,,,、,.,,,.,,,.1/3,,HCO-3.1/3,HCO-3,,.:[1]　HaoOliverJ,HuangJason.Alternatingaerobic-anoxicprocessfornitrogenremoval:processEvaluation[J].WaterEnvironmentResearch,1996,38(1):83—93[2]　KimHyunook,HaoOliverJ.pHandOxidation-reductionpotentialcontrolstrategyforoptimizationofnitrogenremovalinanalternatingaerobic-anoxicsystem[J].WaterEnvironmentResearch,2001,73(1):95—102[3]　LefevreF,AudicJM,BujonB.Automaticregulationofactivatedsludgeaeration-single-tanknitrification-denitrification[J].WaterScience&Technology,1993,28(10):289—298[4]　RordriguesAnaC,BritoAntonioG,MeloLuisF.Posttreatmentofabrewerywastewaterusingasequencingbatchreactor[J].WaterEnvironmentResearch,2001,73(1):45—51[5]　PiersonJohnA,PavlostathisSpyrosG.Real-timemonitoringandcontrolofsequencingbatchreactorsforsecondarytreatmentofapoultryprocessingwastewater[J].WaterEnvironmentResearch,2000,72(5):585—592580　　　　　　　　　　24