BAF反冲洗污泥的特性及絮凝效能

©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1.,150090;2.,250022;3.,150090;4.,300072):(BAF),BAF,,BAF,,:;;;:X703.1:A:1000-4602(2004)09-0001-04CharacteristicsofBackwashingSludgefromBiologicalAeratedFilter(BAF)andItsFlocculationEfficiencyQIULi2ping1,2,MAJun3,ZHANGLi2xin2,WANGLing2quan4(1.PostdoctoralProgramme,HarbinInstituteofTechnology,Harbin150090,China;2.SchoolofCivilEngineering,JinanUniversity,Jinan250022,China;3.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;4.SchoolofEnvironmentalScienceandEngineering,TianjinUniversity,Tianjin300072,China)Abstract:Backwashingsludgetreatmentfrombiologicalaeratedfilter(BAF)wasoneofthetechnicaltroublesthatinfluencetheengineeringapplication,andtheninvestigationwasmadeonthesettlingandbio2floc2culationperformanceofBAFbackwashingsludge,andsystematicanalysiswascarriedoutforitsefficiencyinbio2chemicallyenhancedcoagulationtreatmentofdomesticsewageandcharacteristicsofsecondarysludge.Theresultsshowthatthebackwashingsludgehasgreatbioactivityandflocculationability.Whenthecombinedbackwashingsludgeandmetalsaltcoagulantisusedforpretreatmentofdomesticsewage,theeffluentqualityissuitableforuseasinfluentofBAF,andthesecondarysludgeproducedintreatmentprocesshasgoodsettlinganddewateringperformance.Keywords:BAF;backwashingsludge;bio2flocculation;enhancedpretreatment:(59825106);(B0303);(y0417)12004Vol.20CHINAWATER&WASTEWATERNo.9©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(BAF),[1],BAF1BAF,(760mg/L),,1g/L2021,11Tab.1DomesticsewagequalityCOD(mg/L)199.6326.7(mg/L)42.346.3(mg/L)48.651.2pH5.87.7(mg/L)00.01(mg/L)1.85.2(mg/L)58DBJ621,,5min(150r/min)2min,(50r/min)10min,30min,[2]:2min,3min,78min;10L/(m2s)2211(8%10%)22Tab.2CharacteristicsofbackwashingeffluentMLSS(mg/L)MLVSS(mg/L)SVI(mL/g)500100035075027752,BAF,,SVI,,,,,(),,,BAF()(),,,212,[3],(EPS),,BAF,,11Fig.1Effectofbackwashingsludgedosageoncoagulationefficiency1,CODSS50mL/L,CODSS25.1%22.8%,CODSS(19%)10%,,,50100mL/L,213,22004Vol.20No.9©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(%)COD3SS3TP3COD33SS33TP33(mg/L)051.654.412.054.163.914.03073.577.483.474.681.984.1507488.089.878.288.190.7(mg/L)048.954.414.551.2759.413.73062.575.570.963.776.971.35072.886.682.073.985.982.2:33350100mL/L3,50100mL/L30mg/L,CODSSTP74.6%81.9%84.1%(100mL/L),CODSSTP100801mg/L,BAF[4],,,,,(),214,,(50mL/L)(30mg/L)(50mL/L30mg/L),44Tab.4Settlinganddewateringperformanceofbackwashingsludge++30min(mL)152121231418151816191720(%)912.811.5252.42.92.52.92.83.22.853.4(%)97.799.297.697.798.498.6(%)78.678.589.387.275.876.14,30min,;60min2.4%3.4%,,3060min2/3,,,4,,15min90%,;78%,;76%,,,,,,3,()10%,,COD,760mg/L32004Vol.20No.9©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:[1],.[J].,2002,20(3):7-11.[2].(3)[M].:,1989.[3],,,.[J].,1998,14(2):5-7.[4]EI2GoharyFA.Physical2chemical2biologicaltreatmentofmu2nicipalwastewater[J].WaterScienceTechnology,1991,24(7):285-292.:(1968-),,,,,:[phone]E-mail:[e-mail]:2004-04-26,:De50,De50,S,,,S,12,11:De50,De50,,,2040cm,,,12,,22()42004Vol.20No.9