供氧充足环境下SBBR实现短程硝化的控制研究许朕

SBBR,＊,,,,(,　410082):SBBR.,:(DO)5mgL,pH7.0,(t)25℃,,12h.,FA、CO2HNO2,,SBBR.,NH+4-N0.52kg(m3·d),NaHCO31.5mgL,NH+4-N89%,NO-2-N83%,.FANO-2-N,CO2AOB,.:SBBR;;;;:X703.1　:A　:0250-3301(2008)07-1860-07:2007-07-23;:2007-09-11:(973)(2005CB724203);(50478053);(04JJ3004,05JJ2004);(05FJ3001);(K051132-72):(1983～),,,,E-mail:[e-mail]＊,E-mail:[e-mail]ficationinSBBRwithAdequateOxygenSupplyXUZhen,YANGZhao-hui,ZENGGuang-ming,XUZheng-yong,WANGRong-juan,SUNSai-wu(CollegeofEnvironmentalScienceandEngineering,HunanUniversity,Changsha410082,China)Abstract:Atthehighlevelofdissolvedoxygen(DO)insequencingbatchbiofilmreactor(SBBR),theapproachandmechanismforrealizingshortcutnitrificationwereresearched.Landfillleachatewasusedashandlingofobject,themainlyenvironmentparametersofthereactorwerecontrolledasfollow:DO5mgL,pH7.0,temperature25℃,adoptedalldrainagemodeand12-hourcycleinfluent.Throughmathematicalderivationandmodelinganalysis,determinedfreeammonia(FA),CO2andHNO2asthedirectcontrolfactors,whereastheinfluentcycletimewastheindirectone,shortcutnitrificationwasachievedeffectivelyinSBBR.Whenthevolumeloadofammonia(NH+4-N)was0.52kg(m3·d)andNaHCO3was1.5mgLinthereactor,theshortcutnitrificationeffectwasapparentasNH+4-Nconversionratewas89%andNO-2-Naccumulationrateachieved83%atthesametime.Withadequateoxygensupply,thekeyfactorsofachievingNO-2-NaccumulationisFAconcentration,andasthecarbonsourceofammonia-oxidizingbacteria,CO2canupgradethereactorperformancefurther.Keywords:SBBR;shortcutnitrification;model;ammoniaconversion;nitriteaccumulation　　SBBRSBR,SBR,、,(AOB),SBBR[1～5].2,(NH+4-N)AOB(NO-2-N),NO-2-N(NOB)(NO-3-N):NH+4AOBNO-2　()NO-2NOBNO-3　()　　Voets[6]1975,,NO-2.25%40%[7],,.NO-2-N[8].(DO)[9～14].DO,AOBNOB,AOBDONOB,DO,,NO-2-N[15].AOB,NOBNH+4-N,DO,COD,COD.DO,,SBBR.29720087　　　　　　ENVIRONMENTALSCIENCEVol.29,No.7Jul.,2008DOI:10.13227/j.hjkx.2008.07.0201　1.1　.MLSS153.45gL,MLVSS95.14gL,MLVSSMLSS0.62.1.2　,:NH+4-N650mgL±20mgL,COD2100mgL±150mgL,BOD1168mgL±50mgL,SS378mgL±20mgL,pH8.25±0.1.1.3　1.3.1　SBBR(1),,3L,,,2L.,,,.,.1.;2.;3.;4.;5.;6.;7.;8.;9.;10.;11.1　SBBRFig.1　SchematicchartoftheSBBRrector　1.3.2　SBBR12h,※※※※,,30min,.,,,,,,,,.1.3.3　,DO5mgL,(t)25℃,45%NaOH35%HCl,pH7.0.1.4　COD:;NH+4-N:;NO-2-N:N--;NO-3-N:;SS:;DO:;pH:pH(SartoriuspH).1.5　NO-2-N,NH+4-N,2.NH+4-NNO-2-N:σNH+4-N=SNH+4,in-SNH+4,outSNH+4,in×100%(1),σNH+4-NNH+4-N(%);SNH+4,inNH+4-N(mgL);SNH+4,outNH+4-N(mgL).σNO-2-N=SNO-2,outSNO-2,out+SNO-3,out×100%=11+SNO-3,outSNO-2,out×100%(2),σNO-2-NNO-2-N(%);SNO-2,outNO-2-N(mgL);SNO-3,outNO-3-N(mgL).(1),NH+4-NSNH+4,in-SNH+4,out,[16～18],:SNH+4,in-SNH+4,out=τ·XAOB·YNH3·μnetAOB(3),τHRT(d);XAOBAOB(mgL);YNH3AOBNH3;μnetAOBAOB(d-1).:μnetAOB=μAOB-μdecAOB(4),μAOBAOB(d-1);μdecAOBAOB(d-1).18617:SBBR.Anthonisen[19]AOB(FA)、O2、CO2,(5):μAOB=μmaxAOB·SNH3KNH3,A+SNH3·SO2KO2,A+SO2·SCO2KCO2,A+SCO2(5),μmaxAOBAOB(d-1);SNH3NH3(mgL);SO2O2(mgL);SCO2CO2(mgL);KNH3,AAOBNH3(mgL);KO2,AAOBO2(mgL);KCO2,AAOBCO2(mgL).,[SO2(5mgL)KO2,A(0.4mgL)][20],(5):μAOB=μmaxAOB·SNH3KNH3,A+SNH3·SCO2KCO2,A+SCO2　　(6)　　,FA,HNO2,[20,21]:ri,inhibited=rkiki+I(7)　　i,ri,inhibitedr、Iki.(6):μAOB=μmaxAOB·SNH3KNH3,A+SNH3·SCO2KCO2,A+SCO2·kNH3,AkNH3,A+SNH3·kHNO2,AkHNO2,A+SHNO2(8),kNH3,ANH3AOB;kHNO2,AHNO2AOB;SHNO2HNO2(mgL).:μdecAOB=bAOB(9),bAOBAOB(d-1).:μnetAOB=μAOB-μdecAOB=μmaxAOB·SNH3KNH3,A+SNH3·SCO2KCO2,A+SCO2·kNH3,AkNH3,A+SNH3·kHNO2kHNO2+SHNO2-bAOB(10):SNH+4,in-SNH+4,out=τ·XAOB·YNH3·μnetAOB=τ·XAOB·YNH3·μmaxAOB·SNH3KNH3,A+SNH3·SCO2KCO2,A+SCO2·kNH3,AkNH3,A+SNH3·kHNO2kHNO2+SHNO2-bAOB(11)　　(2),NO-2-N,SNO-2,outSNO-3,out.,,.:SNO-2,out=SNO-2,pro-SNO-2,con(12),SNO-2,proNH+4-NNO-2-N(mgL);SNO-2,conNO-2-N(mgL).,NH+4-N:①;②;③.NH+4-Nλ,,1molNH+4-N1molNO-2-N,1molNO-2-N1molNO-3-N[22],(12),:SNO-2,outSNO-3,out=4618·λ·(SNH+4,in-SNH+4,out)-SNO-2,con6246SNO-2,con=1.9·λ·SNH+4,in-SNH+4,outSNO-2,con-0.74(13)SNH+4,in-SNH+4,outSNO-2,con,NO-2-N.(11),NO-2-N:SNO-2,con=τ·XNOB·YNO2·μnetNOB=τ·XNOB·XNO2·μmaxNOB·SNO2KNO2,N+SNO2·SCO2KCO2,N+SCO2·kNO3,NkNH3,N+SNH3·kHNO2,NkHNO2,N+SHNO2-bNOB(14)1862　　　　　　29,XNOBNOB(mgL);YNO2NOBNO-2;μnetNOBNOB(d-1);μmaxNOBNOB(d-1);SNO2NO2;KNO2,NNOBNO-2(mgL);KCO2,NNOBCO2(mgL);kNH3,NNH3NOB;kHNO2,NHNO2NOB;bNOBNOB(d-1).2　NH+4-N、NO-2-N、NO-3-NNH+4-NNO-2-NFig.2　Concentrationofammonium,nitriteandnitrate,ammoniumconversionandnitriteaccumulationrateinthedomesticationstage　　(11)(14):SNH+4,in-SNH+4,outSNO-2,con=τ·XAOB·YNH3·μnetAOBτ·XNOB·YNO2·μnetNOB=XAOB·YNH3·μnetAOBXNOB·YNO2·μnetNOB(15)　　(11)(15),NH3、CO2HNO2.,SBBR.2　2.1　SBBR1L,,48h,.,.,,12h.NH+4-N、NO-2-N、NO-3-N,NH+4-NNO-2-N,2.2,1～20d1,0.1,NH+4-N0.13kg(m3·d),NH+4-N27%72%,NO-2-N,NH+4-NNO-3-N,,NOB,AOB,NO-2-NNO-3-N,NO-2-N.20～40d,0.2,0.26kg(m3·d),,NH+4-N,37%,,68%.NO-2-N,75%.,,NH+4NO-2NO-3[23],NO-2-NNOB.NO-2-N,.2.2　,,NH+4-N,NH+4-N.,NH+4-N、NO-2-NNO-3-N,3.40d,0.25,10d0.05,0.4,0.325kg(m3·d)0.52kg(m3·d).3,,NH+4-N60%～70%,NH+4-NNH+4-N,NO-2-N,83%,NO-2-N.,NO-2-N.18637:SBBR3　NH+4-N、NO-2-N、NO-3-NNH+4-NNO-2-NFig.3　Concentrationofammonium,nitriteandnitrate,ammoniumconversionandnitriteaccumulationrateindifferentinfluentloads　,,NH+4-N,(NaHCO3),1.0、1.52.0mgL,pH7.0,4.　　NaHCO3,NH+4-NNO-2-N.1(1.0～