搜索
3210201110ENVIRONMENTALSCIENCEVol．32No．10Oct．2011121131.5106552.5102253.5102750～26000kJ·kg－17．．1000kJ·kg－145min18.58%、24h43.52%26000kJ·kg－137.03%10．．．1000kJ·kg－1．．X705A0250-3301201110-3004-072010-12-012011-05-112006A367020011976～E-mailfordson@163．comEffectofUltrasonicEnergyontheCharacteristicsofWasteActivatedSludgeFENGXin1DENGJin-chuan2LIBi-qing1LUOGang1LEIHeng-yi31.GuangzhouSewageTreatmentCo．Ltd．Guangzhou510655China2.ZhongkaiUniversityofAgricultureandEngineeringGuangzhou510225China3.SchoolofEnvironmentandScienceSunYat-senUniversityGuangzhou510275ChinaAbstractSevenultrasonicenergylevelsrangingfrom0to26000kJ·kg－1wereusedtodisintegrateexcesssludgetoinvestigatethechangesinphysicalcharacteristics．Theresultsindicatedthattheultrasonicationprocessdestroysflocstructurefacilitatesthetransferofmatterintotheaqueousphaseandbreaksupcellwallswhichfacilitatedtheimprovementofsettleabilityandbiodegradability．Lowultrasonicenergiescouldimprovethesettleabilityandsupernatantturbidity．Whentheenergyof1000kJ·kg－1wasappliedintothesludgethemaximalsettlingvelocityofsludgeat45minwasincreasedby18.58%andthesupernatantturbidityat24hwasdecreasedby43.52%comparedtothecontrol．Howeverhighultrasonicenergiesdeterioratedthecharacteristics．Themaximalsettlingvelocitywasreducedby37.03%andthesupernatantturbiditywasincreasedby10timesincomparisontothecontrolwhentheenergydoseof26000kJ·kg－1wasapplied．Withtheincreasesinultrasonicenergiestheparticlesizewassignificantlydecreasedthesolublesolidsincreasedandtheflocclustersdispersed．Thesechangesinsludgecharacteristicsweredirectlydependentupontheamountofultrasonicenergyapplied．Furthermorethesecharacteristicscorrelatedsignificantlytotheultrasonicenergy．1000kJ·kg－1wastheoptimalenergythatimprovedthesettleabilityandthesupernatantturbidityandthatdestructedtheflocstructureofsludge．Ontheotherhandparticlesizewasanimportantfactoraffectingsludgesettleabilityandsupernatantturbidity．Theoptimalvaluesledtobestsettleabilityandturbidity．Keywordswasteactivatedsludgeultrasonicationdisintegrationcharacteristics．、．、．1．2、3、4、5、6、7、8．．DOI:10.13227/j.hjkx.2011.10.03510910、131112．3COD．1、131415CODBOD11314．．11.1A2-O55m3．4℃．．1．11Table1CharacteristicsoftheinitialsludgesamplepHTS/mg·L－1VS/mg·L－1TDS/mg·L－1/%6.6614377±918555±87494±1698.56±0.011±1.21.2.1、320mm135mm．20kHz500～2000W．1.2.20～26000kJ·kg－17．500mL1000mL10mm14．PtVTS01．3SPSS11.5.0．pH16．Es=P·tV·TS011.2.3100mL27mmsettlingvelocity．24h17．LS-popⅢOMEC0.2～200μm．CutDiameterdp25、dp50、dp75dp90．TS、VSTDS17．TDSITDSTDSTDS2．NH+4-N、NO－3-N、．ITDS%=TDSS－TDSS0TDSS0×100%2．1mLNikonEclipsei50．50033222.12.1.1SV．18SV．1．11h45min．500kJ·kg－11000kJ·kg－145min51.62mm·h57.44mm·h6.56%18.58%．＜1000kJ·kg－1．＞5000kJ·kg－1．＞5000kJ·kg－112．1000kJ·kg－1．1Fig．1Effectofultrasonicenergyonsludgesettlingvelocity4～8h4h．234．2Fig．2Effectofultrasonicenergyonsludgeparticlesizedistribution3Fig．3Effectofultrasonicenergyonparticlesizedistributionofsludge．Chu131219．2.1.224h．524h．＜1000kJ·kg－1．500kJ·kg－11000kJ·kg－127.69%43.52%．＞5000kJ·kg－126000kJ·kg－110．6003104100Fig．4Photomicrographsofthetreatedanduntreatedsludge100×．＜1000kJ·kg－1．1000kJ·kg－1Gonze4Bougrier12．2.1.32．2＜200μm．＜35μm＞35μm2．3dp90＜77.05μm40.49μm．500kJ·kg－126000kJ·kg－1dp9075.77μm55.06μm39.79μm27.54μm．10007003325Fig．5EffectofultrasonicenergyonsludgesupernatantturbiditykJ·kg－1dp903.2%26000kJ·kg－1dp9028.5%．2P=0.01－0.996．Na20．dp25、dp50、dp75dp90．．26000kJ·kg－1dp25、dp50dp7537.6%、34.2%31.8%．21Table2CorrelationanalysisofEsandphysicalcharacteristicsofsludgedp90TSVSTDS0.965＊＊－0.996＊＊－0.4890.7290.987＊＊1＊＊P=0.012.1.46TSVS14370mg·L－18784mg·L－1．TSVSrTS-Es=－0.489rVS-Es=0.729TSVS．6Fig．6Effectofultrasonicenergyonthemasscompositionofsludge．TDSTDSP=0.010.987．500kJ·kg－126000kJ·kg－1TDS2.89%45.76%．26000kJ·kg－1．TDSTS26000kJ·kg－11.62%．2.1.5．4100．21、2223．26000kJ·kg－1．2.28003102.2.1、．．．755μm75μm36.36%30min25.3mm·h－142.4mm·h－167.58%＞75μm37.5mm·h－1．．75μm．7Fig．7Particlesizeasafunctionofsludgesettlingvelocity2.2.2．8．8dp9075μm55μm1.8NTU56.9NTU8Fig．8Particlesizeasafunctionofsludgesupernatantturbidity31.6．314h．、．2500kJ·kg－126000kJ·kg－145min41.34%24h13.2542.87%dp9027.33%30.78%．26000kJ·kg－11.62%．3TSVS．42．1＜1000kJ·kg－1．1000kJ·kg－145min18.6%43.7%．2900332＞5000kJ·kg－126000kJ·kg－137.03%10．．2．、．5．1TiehmANickelKZellhornMetal．UltrasonicwasteactivatedsludgedisintegrationforimprovinganaerobicstabilizationJ．WaterResearch20013582003-2009.2BougrierCAlbasiCDelgenesJPetal．Effectofultrasonicthermalandozonepre-treatmentsonwasteactivatedsludgesolubilisationandanaerobicbiodegradabilityJ．ChemicalEngineeringandProcessing2006458711-718.3KoppJMüllerJDichtlNetal．AnaerobicdigestionanddewateringcharacteristicsofmechanicallydisintegratedexcesssludgeJ．WaterScienceandTechnology19973611129-136.4GonzeEPillotSValetteEetal．UltrasonictreatmentofanaerobicactivatedsludgeinabatchreactorJ．ChemicalEngineeringandProcessing20034212965-975.5WeemaesMGrootaerdHSimoensFetal．AnaerobicdigestionofozonizedbiosolidsJ．WaterResearch20003482330-2336.6WoodardSEWukashRF．Ahydrolysis/thickening/filtrationprocessforthetreatmentofwasteactivatedsludgeJ．WaterScienceandTechnology1