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EGSB董春娟1, 吕炳南2(1.太原大学环境工程系,山西太原030009;2.哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090) : 对接种市政消化污泥的膨胀颗粒污泥床(EGSB)反应器内颗粒污泥的快速培养及其特性进行了试验研究。结果表明,颗粒污泥的培养仅需46d,进水COD负荷和去除率可分别达到7.12kgCOD/(m3d)和91%。经历49d的提高负荷期后,EGSB反应器获得了良好的运行效果:当进水COD浓度为3700mg/L、HRT为3.4h时,进水COD负荷可达42.51kgCOD/(m3d),对COD的去除率达到95.7%,出水COD浓度160mg/L。成熟颗粒污泥的沉速为30.64～84.73m/h,污泥密度为62.06g/L,MLSS为45.29g/L。随着有机负荷的快速提高,颗粒污泥的粒径明显增大,平均粒径由形成初期的0.9mm增大到成熟期的1.2mm,且颗粒更加均匀,中间粒径(0.45～0.9mm)的质量分数达到了69.6%。与消化污泥相比,颗粒污泥的比产甲烷活性得到了明显的提高;且反应器不同高度处的颗粒污泥的产甲烷活性是不同的,底部的活性最高。成熟期的颗粒污泥更加规则、密实,强度也更高。颗粒污泥的微生物菌群丰富,细胞间排列紧密,物质传递迅速,颗粒表面凹凸不平,比表面积很大,泥水接触和传质效果良好。 : EGSB反应器; 消化污泥; 颗粒污泥; 培养:X703.1 :C :1000-4602(2006)15-0062-06 :2002(02-2-2)RapidCultureandPropertiesResearchofGranularSludgeinEGSBReactorDONGChun-juan1,LVBing-nan2(1.DepartmentofEnvironmentalEngineering,TaiyuanUniversity,Taiyuan030009,China;2.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China) Abstract: TherapidcultureandthepropertiesofgranularsludgeintheEGSBreactorforseedingmunicipaldigestedsludgewereinvestigated.46daysaretakenforthecultureofgranularsludgeintheEGSBreactor.TheinfluentloadingrateandtheCODremovalefficienciesare7.12kgCOD/(m3d)and91%,respectively.After49daysofincreasingloads,theEGSBreactoroperateswel.lWithinfluentCODconcentration3700mg/LandHRT3.4h,theinfluentloadingrateis42.51kgCOD/(m3d),CODremovalefficiencyis95.7%andtheeffluentCODconcentrationislowerthan160mg/L.IntheEGSBreactor,thematuregranuleshassettlingratesof30.64-84.73m/h,andthesludgedensityandconcentrationare62.06g/Land45.29g/L,respectively.Astheloadingraterapidlyincreases,thegranularsizealsoincreases.Theaveragediametervariesfrom0.9mmattheforminggranulestageto1.262第22卷 第15期2006年8月 中国给水排水CHINAWATERWASTEWATER Vo.l22No.15Aug.2006mmatthematuregranulestage.Moreover,granuleismoreeven,theweightpercentageofthegranulesinmediumsizeattains69.6%.Comparedwithmunicipaldigestedsludge,thespecificmethanogenicac-tivitiesofthegranulesdistinctlyincrease.Andatdifferentsampleportsofthereactor,thegranulesmeth-anogenicactivitiesaredifferen.tThemethanogenicactivitiesofthegranulesatthebottomofthereactorarethehighes.tInthematurestage,thegranularsludgebecomesmoreregular,dense,andhashighin-tensity.Thegranuleshaveanenrichmentmicrocommunity,closecellarraysandveryquickmasstrans-fer.Sincethegranuleshaveconvexandconcavesurfacesandverylargespecificsurfaceareas,thecon-tactandmasstransfereffectbetweenwastewaterandsludgearewel.l Keywords: EGSBreactor; digestedsludge; granularsludge; culture 、(expandedgranularsludgebed,EGSB)。EGSB[1～4],,,,EGSB,。,,,。,、,EGSB,[5]。EGSB,、、、,EGSB、。1 材料与方法1.1 EGSB。1.2 、,,,。COD∶N∶P=100∶3∶1、S∶P=1∶2、S∶Fe2+=3∶1、Fe2+∶Co2+∶Ni2+=10∶1∶2NH4Cl、KH2PO4、Na2S9H2O、FeCl24H2O、CoCl26H2O、NiCl26H2O。NaHCO3pH6.8～7.2,CaCl2。1.3 EGSB16.5L,10L。90mm,、18∶1。,,(35±1)℃。1。1 Fig.1 Schematicdiagramofexperimentalset-up1.4 ① CODSVI[6];pHPHS-3C;(VFA)[7]。② (MLSS)(MLVSS):,105℃MLSS,600℃MLVSS。MLSSMLVSS: X=[x1h1+∑i12(xi+xi+1)(hi+1-hi)+xdhd]×π4d2×100063第15期董春娟,等:EGSB反应器内颗粒污泥的快速培养及特性研究第22卷 X———MLSSMLVSS,g d———,m x1,xd,xi———、iMLSSMLVSS,g/L h1,hd,hi———、i,m③ :,30min,105℃,。④ :,1.25、0.9、0.8、0.63、0.450.2mm,,105℃、,()。⑤ 。1L,,(20～30),,v=h/t,。⑥ :10mL125mL,40mL。CaAc2:35.7g/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/L。30%70%,(35±1)℃。Marriotte,3%NaOH,[8]。⑦ 。,4℃0.1mol/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)。2 结果与讨论2.1 EGSBEGSB。25d;35d,;46d、,,,7.12kgCOD/(m3d),COD91%,EGSB。2。2 Fig.2 PerformanceofEGSBatgranulesformingandincreasingloadsstageEGSB,CODHRTCOD。HRT3.4h、COD42.51kgCOD/(m3d),COD95.7%,49d(3)。3 VFACODFig.3 EffluentVFAandCODremovalefficiencyatincreasingloadsstageCOD,64第15期 中国给水排水 第22卷,,Fe、Co、NiCOD(Fe、Co、NiCOD)。COD,,COD90%,VFA(2.0mmol/L)。2.2 EGSBMLSS60.06g/L,VSS/SS0.41。,()(1/2～2/3),,,。MLSS33.01g/L,COD,MLSS45.29g/L。1。1 Tab.1 Propertiesofgranularsludgeatvariousrunningstages /mm0.91.2/(gL-1)62.06MLSS/(gL-1)60.0633.0145.29MLVSSM/LSS0.410.510.60/(gCODCH4g-1VSSd-1)0.2200.4780.680 ,。COD,,MLVSSM/LSS0.510.60,。2.3 4。4,,,0.2mm27.52%,1.25mm22.4%。,,,,、;、、,。,0.2mm,(0.45～0.63)、(0.63～0.8)(0.8～0.9)mm,15.2%、8.64%10.72%26.6%、19.6%23.4%。4 Fig.4 Sizedistributionatformingandmaturegranulestages,。512。5 Fig.5 Sizedistributioninvarioussampleportsatmaturegranulestage5,1,(0.45～0.63)、(0.63～0.8)(0.8～0.9)mm26.6%、19.6%23.4%;2,0.2～0.45mm29%(14.6%);0.45～0.63mm39.3%(126.6%),1.25mm7.32%(117.6%)。2.4 。6,。65第15期董春娟,等:EGSB反应器内颗粒污泥的快速培养及特性研究第22卷6 Fig.6 Methanogenicactivityatvariousrunningstages 6,,,151.8%;,、、,,15.7%。,7。7 Fig.7 Methanogenicactivityformaturegranulesatvarioussampleports7,4、3、21,15.9%、36.9%、68.1%191.3%,43.36、32.38、58.4664.33g/L,,。2.5 ,,,,,。、、、,。。 ,、、。、、、,,,,,;,,COD,,COD90%,VFA,,70%～80%。3 结论① EGSB46d、,COD7.12kgCOD/(m3d),COD91%。COD、HRTCOD,COD90%,VFA(2.0mmol/L)。49d,EGSB:COD3700mg/L、HRT3.4h,COD42.51kgCOD/(m3d),COD95.7%,COD160mg/L。② COD,,。EGSB。,184.73(1.25mm)、72.12(0.9～1.25mm)、69.5