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,,,,(,100084):,,.,,.,,40193%,SCOD,2315%.:;;;;:X705:A:025023301(2008)1022815205:2007210209;:2007212215:(1970),,,,,E2mail:jianguoj@tsinghua.edu.cnImprovementofDisintegrationandAnaerobicDigestionforSewageSludgewithUltrasonicGeneratorJIANGJian2guo,ZHANGYan,ZHANGQun2fang,CHENMao2zhe,DUXue2juan(DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China)Abstract:Ultrasonicgeneratingtroughwasappliedtostudytheimpactofultrasoniconconditioningofsewagesludge.Therearefewultrasonicgeneratorsforsludgetreatmentspecifically,sowedesignedadouble2frequencyultrasonicgeneratingtroughwhichcouldadjustfrequency,energydensityandtreatingtimeflexibly.Intheresearchcharacteristicsofsewagesludgetreatedbysingle2frequencyanddouble2frequencyultrasonicwerecompared.Accordingtotheresults,thedigestionbiogasofthesewagesludgetreatedbyultrasonicincreaseobviously,andthedigestionbiogasincrementofthesewagesludgetreatedbysingle2frequencyis40193%,higherthanthattreatedbydouble2frequency.ButtheSCODofthesewagesludgetreatedbydouble2frequencyis2315%,morethanthattreatedbysingle2frequency.Keywords:ultrasonic;sludge;double2frequency;disintegration;digestion,90%99%[1].()120t[2],()11017t[3].,,,,.,.(SCOD)[4],[5].[6],219%.Tiehm[7],22d8d,.,[8].,,,.,.,,,,.11.1,.96%97%,(SCOD)693176747129mgPL.1.2:,19254080kHz,200500W,060min.1(a).2910200810ENVIRONMENTALSCIENCEVol.29,No.10Oct.,2008转载中国科技论文在线,.,.:500mL,.100mL,100mL50mL,(352).1(b).1.3,,.,(352),,,.1Fig.1Experimentequipment2Fig.2Effectofultrasonicgeneratingmodeoncumulativegasproduction22.123,.80kHz,20s.2,,.100WPL,40193%,23198%;125WPL,40193%,26132%.3,,2,,.2.2618229中国科技论文在线[9],,.,.[10]..4Fig.4Effectofultrasonicfrequencyoncumulativegasproductionincrementratio2.35619kHz75WPL.5,,,.10s31mL,21123%,60s61mL,41178%,2.5Fig.5Acumulativegasproductionatvarioustreatmenttimewithultrasonic(19kHz)6Fig.6Gasproductionrateatvarioustreatmenttimewithultrasonic,,.6,.718210:中国科技论文在线[11].2.47,,.75WPL,61mL,41178%.125WPL,1..,,,.,.,,[12].,,,.7(25kHz,60s)Fig.7Effectofultrasonicintensityoncumulativegasproduction2.5SCODSCOD.8,,8SCODFig.8Effectofsingle2frequencyultrasonicanddouble2frequencyultrasoniconSCODinsludgesolution.20s,SCOD,,SCOD.60s,SCOD432mgPL,SCOD260mgPL2315%.9.,,Ca2+,;Mg2+,.2,Ca2+20s,1037mgPL,979mgPL,.Mg2+57mgPL60mgPL,.9Fig.9Effectofsingle2frequencyultrasonicanddouble2frequencyultrasoniconbridgingionconcentrationSCOD,.,,.,818229中国科技论文在线[13,14],.,,.,[15].,SCOD,,.,,SCOD,.3(1),,,.(2),,,.(3)SCOD.60s,SCOD2315%..(4),,,.:[1]OrmeciB,VesilindPA.Developmentofanimprovedsyntheticsludge:Apossiblesurrogateforstudyingactivatedsludgedewateringcharacteristics[J].WaterResearch,2000,34(4):106921078.[2],.[M].:,2005.18219.[3]DavisRD,HallJE.Production,treatmentanddisposalofwastewatersludgeinEuropefromaUKperspective[J].EuropeanWaterPollutionControl,1997,7(2):9217.[4]ChuCP,ChangBV,LiaoGS,etal.ObservationonChangesinUltrasonicallyTreatedWaste2activatedSludge[J].WaterResearch,2001,35(4):103821046.[5],.[J].,2000,26(10):28231.[6],,.[J].,2006,25(4):2062211.[7]TiehmA,NickelK,NeisU.Theuseofultrasoundtoacceleratetheanaerobicdigestionofsewagesludge[J].WaterScience&Technology,1997,36(11):1212128.[8],,,.[J].,1997,42(9):9252928.[9]TiehmA,NickleK,NeisU.Ultrasonicwasteactivatedsludgedisintegrationforimprovinganaerobicstabilization[J].WaterResearch,2001,35(8):200322009.[10],.[J].,1993,13(1):42247.[11]BruusJH,NielsenP,KiedingK.Thestabilityofactivatedsludgeflocswithimplicationstodewatering[J].WaterResearch,1992,26:159721602.[12]PiyasenaPJ,MoharebE,McKellarRC.Inactionofmicrobesusingultrasound:areview[J].InternationalJournalofFoodMicrobiology,2003,87:2072216.[13],,.[J].(),1997,25(10):1102113.[14]DinnoM,DysonM,YoungS,etal.Thesignificanceofmembranechangesinthesafeandeffectiveuseoftherapeuticanddiagnosticultrasound[J].PhysMedBio,1989,15:3972401.[15]SfaaAH,ChristinaB.Effectoflow2doseultrasonictreatmentonSpirulinamaxima[J].AquaculturalEngineer,1998,19:17228.918210:中国科技论文在线