EPS与MBR中污泥活性关系研究

:10072284(2007)12005903EPSMBR李绍峰1,王宏杰2,王雪芹2(1.,518055;2.,150090):采用Eckenfelder模型建立了MBR污泥系统COD降解动力学方程来表征污泥活性,确定了运行时间为19273443505967和76d时COD的降解速率,实验结果表明,污泥活性随着运行时间的延长呈先上升后下降趋势,当运行时间为50d时降解速率K1达到最大值2.72,污泥活性最好;单位体积污泥内EPS含量随运行时间的变化与污泥活性的变化规律相似,当运行时间为43d时达到了最大值252.08mg/L;COD降解速率K1与EPS浓度关系为y=42.553K1+141,两者呈良好正相关,说明单位体积污泥中EPS含量越高,COD的降解速率越快,单位体积污泥的活性也越好:膜生物反应器;胞外聚合物;污泥活性:X172:AAstudyontherelationshipbetweenEPSandsludgeactivityinMBRLIShaofeng1,WANGHongjie2,WANGXueqin2(1.DepartmentofArchitectureEngineering,ShenzhenPolytechnicInstitute,Shenzhen518055;2.SchoolofMunicipal&EnvironmentalEngineering,HarbinInstituteofTechnology,Haerbin150090)Abstract:TheCODdegradationkineticsequationwasestablishedbyEckenfeldermodeltocharacterizethesludgeactivityinMBR,andtheCODdegradationratesatSRT=19d,27d,34d,43d,50d,59d,67dand76dweredetermined.TheexperimentresultsindicatedthatthesludgeactivityascendedfirstlyandthendescendedalongwiththeoperationtimewhiletheCODremovalrateK1atSRT=50dwas2.72whenitreachedthevertex.ThevariationtendencyofEPSconcentrationandsludgeactivityalongwiththeSRTwasconsistentquitewellandtheEPSconcentrationreached252.08mg/LwhentheSRTwas43d.ThecorrelationofEPSandCODdegradationrateK1wasy=42.553K1+141,whichsuggestedthehighertheEPSconcentration,themorerapidlytheCODwasdegradedandthemoreactivewasthesludge.Keywords:MBR;EPS;sludgeactivity(ExtracellularPolymericSubstances,EPS),,EPS,,,,EPS,EPS[1,2][3][4,5][6,7],EPS[8,9]Eckenfelder(MembraneBioreactor,MBR)COD,COD:20061009:(07009031):(1972),,,,EPS(SludgeResistanceTime,SRT),EPS11.1实验装置1,,,,30L;,0.1m,0.2m2/,4,5cm1.2实验原水,,pHCOD360mg/L,TN20mg/L,NH3N16mg/L59中国农村水利水电2007年第12期11.3运行条件76d,2504mg/LHRT6h,DO2.5mg/L,pH7~8,2~3d100mL,6.25L/(m2h):10min,5min1.4检测方法CODNH3NTN();EPS[10],Folin-,,DNA[11]1.5污泥活性的表征,(OxygenUptakeRate,OUR)(Iodonitrotetrazolium,INT)-(ElectronTransportSystem,ETS)[9],,Eckenfelder,Eckenfelder,,,:dSdt=-K1SS=e-K1t+C1(1),,:dSdt=-K1XSS=e-K2Xt+C2(2):S,mg/L,CBODCCODcr;t,h;X,mg/L;K1,K2,C1,C2,,,1927344350596776d,,,SBR,00.250.512357h50mL,CODCOD800mg/L2MBRSRTCOD22.1运行时间对污泥活性的影响2,19d,SRTCOD,1h100mg/L,1hCOD,,,11MBRCOD/dR2R219S=e-0.6997t+6.66910.9609S=e-0.2127t+4.83310.993127S=e-1.1580t+6.64160.9836S=e-0.1442t+5.32650.951334S=e-1.7663t+6.67660.9792S=e-0.1045t+4.76190.615043S=e-2.2181t+6.65550.9722S=e-0.1395t+5.03300.308850S=e-2.7225t+6.71470.9546S=e-0.2029t+4.90000.997159S=e-2.6596t+6.70410.9791S=e-0.1527t+4.83310.873167S=e-2.4532t+6.69790.9534S=e-0.1442t+5.32650.939776S=e-2.2933t+6.65730.9698S=e-0.1045t+4.76190.72341,,CODK1,50d,K12.72,,K1,76d,2.29;,19d,CODK2X,0.21,19d,1hCOD,,K2X50d,K2X0.20COD,K1,K1,,50d,MBR,COD,,,,,F/M,,,(solublemicrobialproducts,SMPs),MBRCOD,,,,60EPS与MBR中污泥活性关系研究李绍峰王宏杰王雪芹SRT,,MBREPS2.2运行时间对EPS的影响MBREPS33,EPS,43d,EPS252.08mg/L,,EPS,,70%~75%;,43d54.28mg/L;DNA,SRT,,F/M,,,,DNA3MBREPS2.3EPS与污泥活性的关系23,EPS(CODK1),44,MBREPSCODK1(3):y=42.553K1+141(3):yEPS,mg/L;K1COD4MBRK1EPS(3),EPS,,COD,,,,,EPS;,,,,EPS,EPS;,F/M,,,,EPS,EPS3(1)EckenfelderMBRCOD,COD,CODK1;50d,COD,K12.72(2)EPS,,43d,EPS252.08mg/L(3)EPSCODK1y=42.553K1+141EPS,COD,:[1]JHBruus,PHNielsen,KKeiding.OntheStabilityofActivatedSludgeFlocswithImplicationstoDewatering[J].WaterRes.,1992,26(12):1597-1604.[2]LEriksson,BAlm.StudyofFlocculationMechanismsbyObservingEffectsofaComplexingAgentonActivatedSludgeProperties[J].WaterSci.Technol.,1991,24(7):21-28.[3],,.[J].,2003,13(9):31-34.[4]CFForstor.FactorsInvolvedintheSettlementofActivatedSludge-INutrientsandSurfacePolymers[J].WaterRes.,1985,19(10):1259-1264.[5]YMagara,SNumbu,KUtosawa.BiochemicalandPhysicalPropertiesofanActivatedSludgeonSettlingCharacteristics[J].Wat.Res.,1986,10(1):71-77.[6]JCho,KHAhn,YSeo,etal.ModificationofASMNo.1foraSubmergedMembraneBioreactorSystem:IncludingtheEffectsofSMPonMembraneFouling[J].WaterSci.Technol.,2003,47(12):177-181.[7]JCho,KHAhn,YHLee,etal.InvestigationofBiologicalandFoulingCharacteristicsofSubmergedMembraneBioreactorProcessforWastewaterTreatmentbyModelSensitivityAnalysis[J].WaterSci.Technol.,2004,49(2):245-254.[8]XiaoqiZhang,LPaulBiship.BiodegradabilityofBiofilmExtracellularPolymericSubstances[J].Chemoshere,2003,50:63-69.[9],,,.OURNT-ETS[J].,2005,21(7):43-46.[10].[D].:,2006.[11].[M].:,2002,137-24.61EPS与MBR中污泥活性关系研究李绍峰王宏杰王雪芹