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EGSB1,2(1.,030009;2.,150090):(EGSB),46d,COD7.12kgCOD/(m3d)91%49d,EGSB:COD3700mg/LHRT3.4h,COD42.51kgCOD/(m3d),COD95.7%,COD160mg/L30.6484.73m/h,62.06g/L,MLSS45.29g/L,,0.9mm1.2mm,,(0.450.9mm)69.6%,;,,,,,,,:EGSB;;;:X703.1:C:1000-4602(2006)15-0062-06:2002(02-2-2)RapidCultureandPropertiesResearchofGranularSludgeinEGSBReactorDONGChun2juan1,LVBing2nan2(1.DepartmentofEnvironmentalEngineering,TaiyuanUniversity,Taiyuan030009,China;2.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China)Abstract:TherapidcultureandthepropertiesofgranularsludgeintheEGSBreactorforseedingmunicipaldigestedsludgewereinvestigated.46daysaretakenforthecultureofgranularsludgeintheEGSBreactor.TheinfluentloadingrateandtheCODremovalefficienciesare7.12kgCOD/(m3d)and91%,respectively.After49daysofincreasingloads,theEGSBreactoroperateswell.WithinfluentCODconcentration3700mg/LandHRT3.4h,theinfluentloadingrateis42.51kgCOD/(m3d),CODremovalefficiencyis95.7%andtheeffluentCODconcentrationislowerthan160mg/L.IntheEGSBreactor,thematuregranuleshassettlingratesof30.64-84.73m/h,andthesludgedensityandconcentrationare62.06g/Land45.29g/L,respectively.Astheloadingraterapidlyincreases,thegranularsizealsoincreases.Theaveragediametervariesfrom0.9mmattheforminggranulestageto1.226221520068CHINAWATER&WASTEWATERVol.22No.15Aug.2006mmatthematuregranulestage.Moreover,granuleismoreeven,theweightpercentageofthegranulesinmediumsizeattains69.6%.Comparedwithmunicipaldigestedsludge,thespecificmethanogenicac2tivitiesofthegranulesdistinctlyincrease.Andatdifferentsampleportsofthereactor,thegranulesmeth2anogenicactivitiesaredifferent.Themethanogenicactivitiesofthegranulesatthebottomofthereactorarethehighest.Inthematurestage,thegranularsludgebecomesmoreregular,dense,andhashighin2tensity.Thegranuleshaveanenrichmentmicrocommunity,closecellarraysandveryquickmasstrans2fer.Sincethegranuleshaveconvexandconcavesurfacesandverylargespecificsurfaceareas,thecon2tactandmasstransfereffectbetweenwastewaterandsludgearewell.Keywords:EGSBreactor;digestedsludge;granularsludge;culture(expandedgranularsludgebed,EGSB)EGSB[14],,,,EGSB,,,,,,EGSB,[5]EGSB,,EGSB1111EGSB112,,,CODNP=10031SP=12SFe2+=31Fe2+Co2+Ni2+=1012NH4ClKH2PO4Na2S9H2OFeCl24H2OCoCl26H2ONiCl26H2ONaHCO3pH6.87.2,CaCl2113EGSB16.5L,10L90mm,181,,(351)11Fig.1Schematicdiagramofexperimentalset2up114CODSVI[6];pHPHS-3C;(VFA)[7](MLSS)(MLVSS):,105MLSS,600MLVSSMLSSMLVSS:X=[x1h1+i12(xi+xi+1)(hi+1-hi)+xdhd]4d210003615,:EGSB22XMLSSMLVSS,gd,mx1,xd,xiiMLSSMLVSS,g/Lh1,hd,hii,m:,30min,105,:,1.250.90.80.630.450.2mm,,105,()1L,,(2030),,v=h/t,:10mL125mL,40mLCaAc2:35.7g/L,NH4Cl:85g/L,KH2PO4:18.5g/L,CaCl22H2O:4g/L,MgSO44H2O:4.5g/L,FeCl24H2O:1.775g/L,CoCl26H2O:200mg/L,NiCl6H2O:405mg/L,Na2S9H2O:50g/L,NaHCO3:10g/L30%70%,(351)Marriotte,3%NaOH,[8],40.1mol/L(pH7.4)4.5%24h,3(15min/);0.1mol/L2h,2(15min/);50%70%80%90%95%(10min/),100%3(10min/)(JEE-4X),,(JFC-1600),(JSM-5610LV)2211EGSBEGSB25d;35d,;46d,,,7.12kgCOD/(m3d),COD91%,EGSB22Fig.2PerformanceofEGSBatgranulesformingandincreasingloadsstageEGSB,CODHRTCODHRT3.4hCOD42.51kgCOD/(m3d),COD95.7%,49d(3)3VFACODFig.3EffluentVFAandCODremovalefficiencyatincreasingloadsstageCOD,461522,,FeCoNiCOD(FeCoNiCOD)COD,,COD90%,VFA(2.0mmol/L)212EGSBMLSS60.06g/L,VSS/SS0.41,()(1/22/3),,,MLSS33.01g/L,COD,MLSS45.29g/L11Tab.1Propertiesofgranularsludgeatvariousrunningstages/mm0.91.2/(gL-1)62.06MLSS/(gL-1)60.0633.0145.29MLVSS/MLSS0.410.510.60/(gCODCH4g-1VSSd-1)0.2200.4780.680,COD,,MLVSS/MLSS0.510.60,21344,,,0.2mm27.52%,1.25mm22.4%,,,,;,,0.2mm,(0.450.63)(0.630.8)(0.80.9)mm,15.2%8.64%10.72%26.6%19.6%23.4%4Fig.4Sizedistributionatformingandmaturegranulestages,5125Fig.5Sizedistributioninvarioussampleportsatmaturegranulestage5,1,(0.450.63)(0.630.8)(0.80.9)mm26.6%19.6%23.4%;2,0.20.45mm29%(14.6%);0.450.63mm39.3%(126.6%),1.25mm7.32%(117.6%)2146,5615,:EGSB226Fig.6Methanogenicactivityatvariousrunningstages6,,,151.8%;,,,15.7%,77Fig.7Methanogenicactivityformaturegranulesatvarioussampleports7,4321,15.9%36.9%68.1%191.3%,43.3632.3858.4664.33g/L,,215,,,,,,,,,,,,;,,COD,,COD90%,VFA,,70%80%3EGSB46d,COD7.12kgCOD/(m3d),COD91%CODHRTCOD,COD90%,VFA(2.0mmol/L)49d,EGSB:COD3700mg/LHRT3.4h,COD42.51kgCOD/(m3d),COD95.7%,COD160mg/LCOD,,EGSB,184.73(1.25mm)72.12(0.91.25mm)69.53(0.80.9mm)55.68(0.630.8mm)36.48(0.40.63mm)30.64(0.20.4mm)m/h,MLSS45.29g/LEGSB,,(0.25mm)(1.25mm),0.9mm;COD,,1.2mm,,(0.450.9mm)69.6%,(70)661522,pH[7]3Ca2+,Ca2+,;SICaCO30,HCO-3,SICaCO30,HCO-3,Ca2+,pH(59);Ca2+,pH(59):[1],,,.[J].,2005,57(2):136-138.[2]SongYonghui,WeidlerPeterG,BergUte,etal.Calcite-seededcrystallizationofcalciumphosphateforphosphorusrecovery[J].Chemosphere,2005,63(2):236-243.[3]DietfriedDonnert,ManfredSalecker.Eliminatonofphos2phorusfrommunicipalandindustrialwastewater[J].Wa2terSciTechnol,1999,40(4-5):195-202.[4]UteBerga,ThomasNeumannb,DietfriedDonnert,etal.Sedimentcappingineutrophiclakes-efficiencyofundis2turbedcalcitebarrierstoimmobilizephosphorus[J].Ap2plGeoche,2004,19:1759-1771.[5]BergU,DonnertD,EhbrechtA,etal.Activefiltrationfortheeliminationandrecoveryofphosph