低氧MBR内有机物对脱氮和污泥性能的影响竺云波

37　920099()JournalofNorthwestA&FUniversity(Nat.Sci.Ed.)Vol.37No.9Sep.2009MBR＊竺云波,王建新(,310005)[　]　【】(MBR)。【】MBR,,MBR3,3(Chemicaloxygendemand,COD)360,220140mg/L,30,2060d,。【】COD360,220140mg/L,89%,72%22%;1,23,(Yg)(ms)0.42,0.39,0.24g/g0.11,0.06,0.08g/(g·d)。【】,,;,;。[]　;MBR;;;[]　X703.1[]　A[]　1671-9387(2009)09-0168-07EffectsoforganicsonbiologicalnitrogenremovalandsludgecharacteristicsinMBRunderlowDOconditionZHUYun-bo,WANGJian-xin(InstituteofEnvironmentalProtectionandDesign,ZhejiangGongshangUniversity,Hangzhou,Zhejiang310005,China)Abstract:【Objective】Inthispaper,theeffectoforganicmatteronthebiologicalnitrogenremovalandthecharacteristicofsludgeinMBRunderlowDOconditionwasstudied.【Method】SimulationtestsforsyntheticdomesticwastewatertreatmentwerecarriedoutinasubmergedMembraneBioreactor.TheMBRsystemwouldberunningat3differentconditionstofindthecharacteristicofsludge.First,thesystemwouldcontinuerunning30dayswith360mg/LCODininfluent,thenitwouldcontiunerunning20dayswith220mg/LCODininfluent,andfinallyitwouldrun60dayswith140mg/LCODininfluent.【Result】ResultsshowedthatatdifferentconcentrationsofinfluentCODof360,220and140mg/L,thecorrespond-ingremovalsofTNwere89%,72%,22%respectively.AccordingtothePirtTheoryandexperimentalre-sults,YgandmsforthreedifferentinfluentCODconcentrationscouldbecalculatedas0.42,0.39,0.24g/gand0.11,0.06,0.08g/(g·d).【Conclusion】ThereductionofinfluentCODwasdetrimentaltothesimul-taneousdenitrification.Ontheotherhand,the“reduction”alleviatedtherestrainingeffectsoforganicsonnitrification,whichwasbenefitedfromtheincreaseofactivityofnitrificationandthedecreaseofthatfororganicdegradationinthesystem.Thisconsequentlymadeitpossiblethatammoniacouldbeutilizedforbothassimilationandnitrificationconcurrently,whichintheoryfavoredthenitrogenremovalunderlowDOcondition.Variationoforganicloadingalsoaffectedsludgeproduction.Keywords:organicmatter;MBR;nitrification;nitrogenremovalunderlowDOcondition;sludgeyield＊[]　2009-04-13[]　(1976-),,,,。　　,,(Sim-ultaneousnitrificationanddenitrification,SND)[1-3]。,、、、。(Dissolvedoxygen,DO)2。(0.2～0.4mg/L)(1.2～1.5mg/L),DO,2,,。,,,,DO,、、[4]。(Membranebioreactor,MBR),,,SND。MBR,、,MBR,,。1　1.1　MBR,,,1.5m2,0.05μm,0.35m。16.3L,8h,。22～24℃。,DO0.5～1.0mg/L。40d。1。1　MBR1.;2.;3.;4.;5.;6.;7.;8.Fig.1　ApparatusdrawingofthetestMBR1.Elevatedwatertank;2.Surgewatertank;3.Bioreactor;4.Filmmodule;5.Micro-poreaerator;6.Aircompressor;7.Gasholder;8.Gasflowindicator1.2　,、、、、,COD115～302mg/L,NH3-N26.1～31.2mg/L,(TN)27.2～37.5mg/L,(TP)4.1～5.0mg/L,pH6.2～7.8。1.3　3,1～3(Chemicaloxygendemand,COD)360,220140mg/L,30,2060d,3COD、(Hydraulicretentiontime,HRT)、DO、1。1　MBR3Table1　OperationalparametersindifferentexperimentalperiodsStageCOD/(mg·L-1)HRT/hDO/(mg·L-1)/℃Temperture/dOperationaltime136080.5～1.022～240～30222080.5～1.022～2430～50314080.5～1.022～2450～1101.4　pH、DO、COD、、、、、(Mixturesludgeofsuspendedsolids,MLSS)、,COD、、、、、MLSS、《》[5],pHDOPHS-3CYSI(MODEL50B)。2　2.1　MBR、1699,:MBR,2～4。COD360,220140mg/L,30,20,60d,3,8,15mg/L3.5,8.7,15.8mg/L;89%,72%22%。COD,。C5H7NO2,1mg/L5×(16/14)×2+(7/2)×(16/14)=15.43mg/L。Mckinney[6],,()0.5,1kg,0.5kg。,1mg/L,15.43/2=7.72mg/L,23.15mg/L。3,COD741,602185mg/L,360,220140mg/LCOD。,,。2　MBRFig.2　TotalnitrogencontentofMBRindifferentstages3　MBRFig.3　Ammonia-nitrogencontentofMBRindifferentstages170()374　MBRFig.4　Nitrate-nitrogencontentofMBRindifferentstages　　3,,0.8mg/L。,。2.2　,2。2,2。3((SOUR)),5。5　MBRFig.5　ChangeofSOURindifferentstages3,(),,SOUR,;。,,,;,,。2.3　,,[7]。,,,。,、,,。,MBR,,,3。,。1000mL(2),3,2。,40mg/L,COD3000mg/L(NO.1NO.2),pH。,DO、pH,0.5～1.0mg/L,6.2～7.822～24℃,4014mg/L,6。1719,:MBR6　COD0,300mg/L、Fig.6　ConversionofNH3-N、NO3-N(NO2-N)andTNunderCODconcentrationis0and300mgCOD/L　　6,COD=300mg/L,;COD=0mg/L,,。,:①,;②,,,;③,,[8]。6,(COD=300mg/L),,(),。,,,,。,(5),,,。,,,。COD0300mg/L2,28mg/L,18%29%。MBRDO(0.5～1.0mg/L),,,;,MBR,,MBR。,MBR-。2.4　MBR110d,,MLSS。7,,1(0～30d)2(30～50d)MLSS,2,3(50～110d)MLSS,COD。3COD140mg/L,MBR0.1kg/(kg·d)。,0.02～0.1kg/(kg·d),[9],,,MBR。,/(F/M),。7　MBRMLSSFig.7　ChangeofMLSSconcentrationinMBR。Pirt[10],,Pirt:-qobs=μobs/Yg+ms。(1)qobs=R0/Xr。(2)172()37μobs=Rm/Xr。(3):qobs(1/d);μobs(1/d);Yg(g/g);ms,(g/(g·d));R0(g/(L·d));Xr(g/L);Rm(g/(L·d))。,qobs-μobs,Ygms。,MBR2:V(dCs/dt)=QiCi-QeCe+R0V。(4)V(dXr/dt)=QiXi-QeXe+RmV。(5)Qi=Qe。(6):V(m3),Cs、CiCe、(g/L),Xr、XiXe、(g/L),Qi、Qe、(L/s),t。,Rm-R0:Rm=dXr/dt,(7)-R0=Qe(Ci-Ce)/V-dCs/dt=(Ci-Ce)/t-dCs/dt。(8)(7)、(7)(8),Rm-R0。(2)(3)qobsμobs,(1),Ygms(2)。2　MBRTable2　KineticconstantofsludgeincreaseindifferentperiodsofMBRStageYg/(g·g-1)ms/(g·g-1·d-1)10.420.1120.390.0630.240.08　　2,Yg,Pirt。,ms。,,[11-12]。(1),12μobsYg,-qobsms,,,MLSS(7)。3obs,Yg,-qobsms,,MLSS。,ms,,NaCl、[13-14]。3　　(1)DO0.5～1.0mg/L,,-。(2),,,。(3),。(4);,;ms,。[][1]　KimuraK,NishisakoR,MiyoshiT,etal.Baffledmembranebioreactorforefficientnutrientremovalfrommunicipalwastewater[J].WatRes,2008,42(3):625-632.[2]　KomesliOT,TeschnerK,HegemannW,etal.Vacuummem-braneapplicationsindomesticwastewaterreuse[J].Desalina-tion,2007,215(1-3):22-28.[3]　,,.[J].,2002(2):38-44.ZhouSQ,ZhouJL,FanJM.Researchprogressofsimultane-ousnitrificationanddenitrificationtechnologyofbiologicalni-trogenremoval