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60 4 Vol.60 No.4 20094 CIESC Journal April 2009石晓庆,王 锦,张 倩(,100044):(MBR),(DO)、/MBR。5min/1min,DO,2、3mg·L-1,1、4mg·L-1,40%。DO2mg·L-1,/,10min/5min,,,70%;(6mg·L-1)。DO/,。,DO(1mg·L-1)、(4mg·L-1),;,,。:;;/;;:X703.1 :A:0438-1157(2009)04-1017-05EffectofaerationonnitrogenremovalinmembranebioreactorSHIXiaoqing,WANGJin,ZHANGQian(DepartmentofMunicipalandEnvironmentalEngineering,SchoolofCivilEngineering,BeijingJiaotongUniversity,Beijing100044,China)Abstract:Toimprovethetotalnitrogen(TN)removalefficiencyofmembranebioreactor(MBR),dissolvedoxygen(DO)andaerationon/offtimewerecontrolledtostudythepossibilityoftotalnitrogenremovalthroughshort-cutnitrificationanddenitrification.Membranefoulingwasalsoinvestigated.Atthefirststage,theaerationon/offtimewas5min/1minandDOconcentrationwascontrolledatdifferentvalues.WhenDOwasat2mg·L-1,3mg·L-1,nitritewasaccumulatedandtheremovalefficiencyofTNwashigherthanthatwhenDOwas1mg·L-1,4mg·L-1.However,thehighestremovalefficiencyofTNwasonlynear40%.Atthesecondstage,DOwas2mg·L-1andaerationon/offtimewascontrolled.Whenaerationon/offtimewas10min/5min,thenitriteaccumulationratioandtheremovalefficiencyofTNwereboththehighest,andtheremovalefficiencyofTNwasnear70%.However,TNremovalefficiencywasreducedwhennitriteconcentrationwastoohigh(about6mg·L-1).Theresearchshowedthepossibilityoftotalnitrogenremovalthroughshort-cutnitrificationanddenitrificationwhenDOandaerationon/offtimewerecontrolledatappropriatevalues.Andtheeffectofaerationon/offtimewasmoresignificantthantheDOcondition.MembranefoulingdeterioratedwhenDOwaseithertoolow(1mg·L-1)ortoohigh(4mg·L-1);thelowertheaerationandthelongertheaerationofftimewas,theworsethemembranefoulingbecame.Keywords:membranebioreactor;nitrogenremoval;aerationon/offtime;membranefouling;short-cutnitrification 2008-08-19,2009-01-05。:。:(1982—),,。:。 Receiveddate:2008-08-19.Correspondingauthor:WANGJin.E-mail:jwang1@bjtu.edu.cnFoundationitem:supportedbytheFoundationofBeijingJiaotongUniversity. (MBR)、,,90%,1mg·L-1[1]。MBR,,,(TN)。,TN60%～80%[2]。[3],。,[4]。MBR,、/MBR。1 1.1 1,0.45m×0.4m×0.1m,15L,(PVDF),1.44mm,0.25m2,0.03μm。5,,。,,。,,。,。1.2 ,,,30℃,(1.0mg·L-12.0mg·L-1)。。,,,。、、、NH4Cl、Na2HPO4·12H2O、KH2PO4、、Na2CO3、MgSO4·7H2OCaCl2,COD∶TN∶TP=100∶10∶2,COD、、、、(NO-2-N)、(NO-3-N)1 Fig.1 Schematicdiagramofsubmergedmembranebioreactor1—feedingtank;2—influentpump;3—levelcontroller;4—oxygensupplyaerator;5—gasflowmeter;6—reactor;7—membranemodule;8—aerationhead;9—programmingtimecontroller;10—solenoidpilotactuatedvalve;11—effluentpump;12—backwashpump;13—backwashtank [5]。4500～5500mg·L-1,30℃,pH7～8,11L·h-1·m-2,(HRT)8h。,/5min/1min,1、2、3、4mg·L-1。2mg·L-1,/[6]5min/1min,20min/4min,20min/10min,10min/5min,5min/2.5min。,20d,(SRT)12d。,12d。1d,,0.1%,,,(5～6kPa)。2 2.1 2。,,。3mg·L-139.85%,3mg·L-1。·1018· 60 ,,12。1 Table1 AveragecontentofdifferentformsofnitrogeninsupernatantunderdifferentDOconditionsDO/mg·L-1NH3-N/mg·L-1NO-2-N/mg·L-1NO-3-N/mg·L-118.90±2.440.023±0.006023.92±0.332.47±0.0910.65±1.5830.88±0.303.11±0.2111.63±1.0440.26±0.080.29±0.0519.77±1.652 Table2 AccumulatingratioofnitriteandremovalefficiencyofTNunderdifferentDOconditionsDOconcentration/mg·L-1R/%TNremovalefficiency/%1—11.28±1.44218.82±1.5830.72±2.19321.10±1.7239.85±1.6441.44±0.6721.96±1.18R=/(+)[4],12,1、4mg·L-1,,。2、3mg·L-1,。,,。2、3mg·L-11、4mg·L-1,。2、3mg·L-1,,,,。2、3mg·L-1,。[7]3000mg·L-12mg·L-1,。3mg·L-1,5000mg·L-1,,3mg·L-1,。2.2 //3,,/,5mg·L-1,。/4。=/(+),,,。,(/5min/1min,20min/4min),;(/20min/10min,10min/5min,5min/2.5min),,10min/5min。/3。,,,。,,。,(20min/10min,10min/5min),,[8],,,,。3,,。。20min/10min,,·1019· 4 :(MBR)3 /Table3 Averagecontentofdifferentformsofnitrogeninsupernatantunderdifferentaerationon/offtime(Aerationon/offtime)/(min/min)Nitrite/mg·L-1Nitrate/mg·L-1R/%TNremovalefficiency/%5/12.47±0.0910.65±1.5818.8230.72±2.1920/43.93±0.164.02±0.4221.6932.69±1.5320/105.91±0.591.94±0.4575.2440.80±1.5410/53.48±0.680.87±0.4480.0169.68±4.575/2.53.15±0.384.31±0.4842.2348.08±3.486mg·L-1,/,(),,[9]。2.3 [10]5。1mg·L-1,,,。2～3mg·L-1,,,,。4mg·L-1,,。3mg·L-1,,,。/6·1020· 60 。/20min/10min,5min/1min。,,;,,。10min/5min,,5min/1min,,,10min/5min5min/2.5min。3 (1)5min1min,30℃,2、3mg·L-1,,。。,40%。(2)2mg·L-1,/,10min/5min,,70%。20min/10min,40%,,。/。,。References[1] GuGuowei(),HeYiliang().ResearchandApplicationofMembraneBioreactorinSewageTreatment().Beijing:ChemicalIndustryPress,2002:76-77[2] GengYan(),ZhouQi(),QuJining().RemovalofammonianitrogenincokingwastewaterwithSMSBRreactor.ChinaWater&Wastewater(),2002,18(7):8-11[3] ZouLianpei(),ZhangLiqiu(),WangBaozhen(),WangLin().EffectofDOonsimultaneousnitrificationanddenitrificationinMBR.ChinaWater&Wastewater(),2001,17(6):10-14[4] RuizG,JeisonD,ChamyR.Nitrificationwithhighnitriteaccumulationforthetreatmentofwastewaterwithhighammoniaconcentration.Wat.Res.,2003,37:1371-1377[5] 《WaterandWastewaterMonitoringandAnalyticalMethod》EditorialBoardofStateEnvironmentProtectionAdministration.WaterandWastewaterMonitoringandAnalyticalMethod().4thed.Beijing:ChinaEnvironmentalSciencePress,2002[6] LimaBS,ChoiBC,YuSW,LeeCG.Effectsofoperationalparametersonaerationon/of