低有机负荷对SMBR系统的影响王琳

SMBR王　琳,元新艳,孙　磊,李世峰(,266003)　:　———(0.1gCODcr/gMLSS.d),,。CODcr,。,,,。、。:　;;;(SMP);:　X703　　　　　:　A　　　　　:　1672-5174(2008)03-479-04　　,(MBR)、[1-2]。MBR,:、、,MBR。,,,。———,,(Solublemicrobialproducts,SMP)、(Extracelluarpolymericsubstances,EPS)、,。。1　1.1,:CODcr160～380mg/L,TN50～86mg/L,NH4+-N37～78mg/L,TP3.9～6.9mg/L,SS100～150mg/L,PH7～8。1。,。,;,1　Fig.1　Blockdiagramshowingtheexperimentalequipment。,。2,,2(、、),3:、、。31。MBR1.0m3,1.2～1.0m。1(PES),56。:0.038μm,4m2/,30L/m2·h,4m3/h。,。4g/L。:([2004]005-1):2007-04-08;:2007-10-26:　(1966-),,,。E-mail:[e-mail]　38　3　20085　PERIODICALOFOCEANUNIVERSITYOFCHINA38(3):479～482May,2008DOI:10.16441/j.cnki.hdxb.2008.03.022。。1　Table1　OperationparametersunderdifferentmodesEquipmentHighmodeNormalmodeEconomymodeVacuumpumpOn∶Off270s∶30sQ=100L/hOn∶Off270s∶30sQ=60L/hOff()Blower(forcleaning)OnOnOn∶Off60s∶3600s()Blower(foraeration)On∶Off60s∶60sOn∶Off60s∶60sOn∶Off20s∶300s1.2CODcr,NH3-N,TN,TP,MLSS,MLVSS[3],EPS[4]、-[5]、[6]。2　2.12　CODcrFig.2　CODsemovalefficiency2,CODcr,CODcr,50mg/L,CODcr83.4%,CODcr。11d,CODcrCODcr,,51850mg/L。(0.1gCODcr/gMLSS·d),,。,,CODcr。3MBR。,,,。40,,,。,。。。,,。3　Fig.3　NH3-Nremovalefficiency2.2,4g/L,47mgO2/gMLSS·h(4)。0.1gCODcr/gMLSS·d,,,。14d,2.6g/L,15.84mgO2/gMLSS·h。40d,4　Fig.4　Variationofsludgeactivityinthereactor,2.7g/L,18mgO2/gMLSS·h。58,,-0.3gCODcr/480　　　　　　　2008gMLSS·d,4d47.5mgO2/gMLSS·h,。2.3(EPS)(SMP)。,,UAP;,BAP。,SMPCODBOD,,[7]。EPS,、、。EPSEPS。SMP,EPSMBR,,。,,,[8-9]。EPS,。SMP。2,EPS,,5　Fig.5　Variationofmicroorganismproductsinthereactor,TMPSMP,SMP[10]。,SMP,SMP,,,。5,。,49498mg/L,58604mg/L。,。。。2.462L/h,118L/h,620L/h,983L/h。,,13,(6)。66d,143L/h。772h、400×10-62h,458L/h,74%。6　Fig.6　Variationofspecificmembraneeffluentflux3　-(0.1gCODcr/gMLSS·d),,。CODcr160～380mg/L,CODcr50mg/L,,。,。,。CODcr,。。,,。70d23%。。、SMP4813　,:SMBR。,-0.3gCODcr/gMLSS·d,,。:[1]　AdhamS,GagliardoP,BoulosL,etal.Feasibilityofthemem-branebioreactorprocessforwaterreclamation[J].WatSciTech,2001,43(10):203-209.[2]　ChangIS,KimSN.Wastewatertreatmentusingmembranefiltra-tion-effectofbiosolidsconcentrationoncakeresistance[J].ProcessBiochmistry,2005,40(3-4):1307-1314.[3]　《》.[M].3.:,1989:90-438.[4]　ZhangX,BisshopPL,KinkleBK.Comparisonofextractionmeth-odsforquantifyingextracellularpolymersinbiofilms[J].WatSciTech,1999,39(7):211-218.[5]　FrolundB,PalmgrenR,KeidingK,etal.Extractionofextracelluarpolymersfromactivatedsludgeusingacationexchangeresin[J].WatRes,1996,30(8):1749-1758.[6]　,,,.[M]..:,2003.[7]　,,,.[J].,2004,31(2):121-125.[8]　,,.[J].,2005,31(2):37-46.[9]　,,,.-[J].:,2005,35(5):830-834.[10]　FolasadeFawehinmi,PietLens,TomStephenson,etal.Theinflu-enceofoperatingconditionsonextracellullarpoymericsubstances(EPS),solublemicrobialproducts(SMP)andbio-foulinginanaerobicmembranebioreactors[C].IWASpecialtyConference:WaterEnvi-ronment-MembraneTechnology.Seoul:SeoulNationalUniversity,2004.TheEffectsofLowOrganicLoadingonanSMBRSystemWANGLin,YUANXin-Yan,SUNLei,LIShi-Feng(CollegeofEnvironmentalScienceandEngineering,OceanUniversityofChina,Qingdao266100,China)Abstract:　Theloworganicloading,thatis,F/M0.1gCODcr/gMLSS·d,couldbringtheactivatedsludgeintheMembraneBioreactor(MBR)intoendogenesisrespiration.Thesludgeconcentrationdecreasedandthesludgeactivitydeteriorated.TheCODcrandpolysaccharideconcentrationsinthereactorwereobviouslyhigherthatthoseintheinfluentandeffluent,whichwascausedbymicrobialaccumulationbeforemembranefiltration.Thesolublemicrobialproductswereeasytobeabsorbedbythemembranesurfacetoformagellayer,whichcouldinducetheincreaseoftrans-membranepressure,causingmembranefouling,andinhibitingtheactivitiesofthemicrobial.LowconcentrationmicroorganismswithlowactivitieshaveaweakabsorptionanddegradationabilityforSolubleMicrobialProducts(SMP).Keywords:　MembraneBioreactor(MBR);loworganicloading;sludgeactivity;SolubleMicrobialProducts(SMP);membranefouling责任编辑　庞　482　　　　　　　2008