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61 1 Vol.61 No.1 20101 CIESC Journal January 2010FAFNAUASB-A/O刘 牡,彭永臻,吴莉娜,王 燕,杨莹莹(,100124):UASB-A/O,,(FA)(FNA)。UASB1TNCOD,UASB2COD,A/OCOD。104d,、3。,FA3.1mg·L-1,,NH+4-N、NO-2-N、TN99%、95%86%。FA0.6mg·L-1,,FANOB,,NO-2-N29%。FNA0.011mg·L-1,NOB,3,FA,FNApH(0.414mg·L-1),FAFNA,NO-2-N92%。FAFNA。:;;;;:X703.1 :A:0438-1157(2010)01-0172-08EffectofFAandFNAonshort-cutnitrificationoflandfillleachateintwo-stageUASB-A/OsystemLIUMu,PENGYongzhen,WULina,WANGYan,YANGYingying(KeyLaboratoryofBeijingWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China)Abstract:Alab-scaletwo-stageUASB-A/Ocombinedprocesswasusedtoinvestigatetheeffectoffreeammonia(FA)andfreenitriteacid(FNA)ontheshort-cutnitrificationofmunicipallandfillleachaterichinammonianitrogen(NH+4-N)onthepremisethattheCODandnitrogenwereremovedsimultaneously.ThedenitrificationandmethanogenesiswereconductedinUASB1simultaneouslyforthepartialremovalofTNandCOD.TheeffluentCODofUASB1wasfurtherremovedintheUASB2bymethanogenesis.Subsequently,thedenitrificationofNO-x-NinthereturnedsludgeusingtheresidualCODandtheshort-cutnitrificationwasachievedintheA/Oreactor.Theexperimentexperiencedthreestagesin104d:thestableshort-cutnitrification,thedamagedshort-cutnitrification,andtherecoveredshort-cutnitrification.TheresultsshowedthatwhenthelowestFAwasabove3.1mg·L-1thestable 2009-07-21,2009-08-14。:。:(1986—),,。:(50978003);(8091001);(PXM2008014204050843)。 Receiveddate:2009-07-21.Correspondingauthor:Prof.PENGYongzhen,pyz@bjut.edu.cnFoundationitem:supportedbytheNationalNaturalScienceFoundationofChina(50978003),theNaturalScienceFoundationofBeijing(8091001)andtheProjectofScientificResearchBaseandScientificInnovationPlatformofBeijingMunicipalEducationCommission(PXM2008-014204-050843). short-cutnitrificationcouldbeachievedandNH+4-Nremovalefficiency,NO-2-NaccumulationratioandTNremovalefficiencywere99%,95%and86%,respectively.WhentheFAwaslowerthan0.6mg·L-1withsufficientalkalinityandextendedaeration,theshort-cutnitrationwasdamagedrapidlyandNO-2-Naccumulationratiodecreasedto29%duetotheweakinhibitionoflowFAonNOB.FNAwaslowerthan0.011mg·L-1atprevioustwostages,whichledtothefailureofinhibitiononNOB.WhileFNAwasincreasedconsiderablyinthe3rdstage(thehighestFNAwas0.414mg·L-1)bydecreasingpH,theshort-cutnitrificationwasrecoveredsoonandmaintainedandNO-2-Naccumulationratioincreasedto92%owingtothecooperativeeffectofFAandFNA.Inbrief,FAandFNAwereimportantfactorstoachieveandmaintaintheshort-cutnitrificationofthemunicipallandfillleachate.Keywords:landfillleachate;short-cutnitrification;freeammonia;freenitriteacid;inhibition ,。、[1]。,,[2]。、,[3]。,、,-[4],,。,25%,40%(COD/TKN2.5)[5-6],4.3[7],。,,,:pH、、、、(freeammonia,FA)(freenitriteacid,FNA),FAFNA[8]。FAFNA(ammonia-oxidizingbacteria,AOB)(nitrite-oxidizingbacteria,NOB)。,FANOB0.1～1.0mg·L-1,AOB10～150mg·L-1[9]。[10][11]-,,FA,FA160mg·L-1。Chung[12]20mg·L-1FA,NO-2-N。Prakasam[13],NOBFNA0.07mg·L-1。Vadi-velu[14],FNA0.011mg·L-10.023mg·L-1,NOB,FNA0.50～0.63mg·L-1AOB。,UASB-A/O,,3A/O。1 1.1 1,UASBA/O。UASB1(UASB)、UASB2(UASB)A/O4.25,8.25、15L,A/O10,1。UASBA/O,,。A/OUASB1,,NO-x-N,CODTN;UASB2COD;A/OCOD。·173· 1 :FAFNAUASB-A/O1 UASB-A/OFig.1 Flowchartoftwo-stageUASB-A/Osystem UASB-A/O3.5L·d-1。UASB1、UASB2A/O(HRT)29、56、103h。UASB1300%,100%。A/O(2)0.5～5mg·L-1;UASB,UASB1UASB220～32℃、35℃,A/O24～26℃。,35d,A/O3500～4500mg·L-1。UASB1UASB226000mg·L-121000mg·L-1。:(raw),UASB1(mix),UASB1(U1e),UASB2(U2e),A/O(A1),(O2～O10)。1.2 104d,3:1FA,(40d);2,FA(15d);3FAFNA(49d)。1.3 ,(mg·L-1):COD12000～16000;BOD56000～8500;NH+4-N2100～2400;SS2400～3100;TN2210～2730;SS2400～3100;8400～11000;TP9～15。pH7.5～8.1。CODCOD;NH+4-N;NO-2-NN-(1-)-;NO-3-N;TNTN/TOC(multiN/C3000,);WTWDO、、pH。。2 2.1 FA2COD。NH+4-N2100mg·L-1,UASB1NH+4-N500mg·L-1,,A/ONH+4-N230mg·L-1。NH+4-N14mg·L-1,NH+4-N99%。NO-x-NUASB1A/O,TN,TN86%。COD12100mg·L-1,UASB1COD3500mg·L-1,UASBCOD1310mg·L-1,A/OCOD1100mg·L-1,COD,COD92%。NO-3-N16mg·L-1,NO-2-N286mg·L-1,NO-2-N95%。FAFNA(1)、(2)[9]·174· 61 2 1NH+4-N、NO-x-N、TN、CODUASB-A/OFig.2 VariationsofNH+4-N,NO-x-N,TNandCODintwo-stageUASB-A/Obiologicalsysteminstage1 [FA]=1714[NH+4-N]×10pHexp6334273+T+10pH(1)[FNA]=4714[NO-2-N]exp-2300273+T×10pH(2) [FA],mg·L-1;[NH+4-N],mg·L-1;T,℃;[FNA],mg·L-1;[NO-2-N],mg·L-1。3A/OFA。A/O,NH+4-N,O8,FAA182.0mg·L-1O83.1mg·L-1,O10FA4.8mg·L-1。NO-2-N,,NO-3-N,16mg·L-1,A/OFANOB。,O2O3NH+4-N0.134kg·m-3·d-10.194kg·m-3·d-1,O40.623kg·m-3·d-1,FA(61.7mg·L-148.3mg·L-1)AOB,O4FAAOB。3。,UASB1,3295mg·L-1。A/O,pH8.45,FNA0.007mg·L-1,FNANOB3 1FA、NO-x-N、、pHA/OFig.3 VariationsofFA,NO-2-Naccumulationratio,alkalinityandpHinA/Oreactorinstage1 。,FANOB。,,FA(20mg·L-1),AOB,,:①,,,UASB2,A/O,[15],AOBFA;②UASB,,COD/NH+4-N,,,。2.2 FAFA,,NH+4-N1300mg·L-1,(DO2mg·L-1)。A/O15d,NO-2-N95%NO-2-N29%,4。5,,A/OA1NH+4-N135mg·L-1,NH+4-N,O6NO-2-N133mg·L-1,NO-3-N45mg·L-1,NH+4-N13mg·L-1,·175· 1 :FAFNAUASB-A/O4 A/ONH+4-N、FA、FNANO-2-NFig.4 VariationsofinfluentNH+4-N,FAav,FNAavandeffluentNO-2-NaccumulationratioinA/Oreactor ;O8,NH+4-N5mg·L-1,NO-2-NNO-3-N,NO-2-N54mg·L-1,78mg·L-1,NO-3-N51mg·L-1,92mg·L-1;O10,NH+4-N,NO-2-N53mg·L-1,NO