SMBR系统活性污泥性质对膜污染特征的影响

34120141ActaScientiaeCircumstantiaeVol．34No．1Jan．2014No．20116120110008No．2010JZ008SupportedbytheSpecializedＲesearchFundfortheDoctoralProgramofHigherEducationNo．20116120110008andtheKeyProgramofNaturalScienceFoundationＲesearchProjectofShaanxiProvinceNo．2010JZ0081984—[e-mail]*[e-mail]1984—[e-mail]*[e-mail]featuresonmembranefoulingcharacteristicsofSMBＲsystemJ．ActaScientiaeCircumstantiae341115-120SMBＲ121*11．7100552．0300022013-05-122013-08-162013-08-21SubmergedmembranebioreactorSMBＲ300L·h－1、15L·m－2·h－1、/8min/2min．．28．94±9．61mg·g－1VSS52．57±7．98mg·g－12．13Trans-membranepressureTMPTMP93．64%．0253-2468201401-115-06X703AEffectsofactivatedsludgefeaturesonmembranefoulingcharacteristicsofSMBＲsystemGAOYanchang12YANGYongzhe1*YINGJingqiang11．SchoolofEnvironmentalandMunicipalEngineeringXi'anUniversityofArchitecture＆TechnologyXi'an7100552．TaiyuanMunicipalEngineeringDesignandＲesearchInstituteTaiyuan030002Ｒeceived12May2013receivedinrevisedform16August2013accepted21August2013AbstractSubmergedmembranebioreactorSMBＲwasoperatedundertheaerationrateof300L·h－1membranefluxof15L·m－2·h－1andsuction-intermittenttimeratioof8min－2min．CharacteristicsoftheactivatedsludgeanditseffectsonmembranefoulingwereinvestigatedunderdifferentstirringintensitiesintheanoxiczoneoftheSMBＲ．TheresultsshowthatstirringintensityhasinsignificanteffectsonthepollutantsremovalperformanceoftheSMBＲ．Howeverthecolloidalsubstanceinthesupernatantofactivatedsludgeincreasedwhenthestirringintensityincreased．Theextracellularpolymerincreasedfrom28．94±9．61mg·g－1to52．57±7．98mg·g－1andmembranefoulingrateincreasedby2．13folders．ThecakelayerbasedtransmembranepressureTMPaccountedfor93．64%ofthetotalTMP．KeywordsactivatedsludgesubmergedmembranebioreactorSMBＲfiltercakelayercolloidalsubstance1IntroductionSubmergedmembranebioreactorSMBＲMBＲ．SMBＲ、SMBＲ．．MBＲDrewsetal．2010．、12%、80%348%Leeetal．2001．．SMBＲ．．、．46Ｒosenbergeretal．2005．Baietal．2002．SMBＲ、ExtracellularPolymericSubstancesEPSTMPCOD、NH+4-N．2Materialsandmethods2．1SMBＲ1∶250L．A40.11m20．4μm．2cm．1．1Fig．1SchematicofsubmergedmembranebioreactorSMBＲsystem2．2．A20138282623．76d31．19℃B2013114111611．16d19．25℃．HＲT38h300L·h－12∶115L·m－2·h－110min8min2min．MLSS5242±1097mg·L－1MLVSS4053±794mg·L－1．COD307．46±54．86g·m－3·d－1NH+4-N8．97±6．52g·m－3·d－16．45±4．29g·m－3·d－1n=11．2．3NaHCO30．2g·L－1．2．4CODNH+4-N4-UV-2100TOCTOC-ASLpHpHPHS-3C．EPS-SMPEPSFrlundetal．1996DowexMarathonTMCsodiumform．6111SMBＲBeckmanAvantiJ-26XP0．45μm．EPSSolubleMicrobialProductsSMP．Gaudyetal．1962Folin-Lowryetal．1951．SMBＲ3000r·min－15minWGZ-200．3Ｒesultsanddiscussion3．1ABSMBＲ±1．1SMBＲ．ABCOD86．75%91．13%NH+4-N98．62%99．37%98．73%99．65%．、．1SMBＲTable1InfluentandeffluentqualityofSMBＲunderdifferentstirringintensitiesCOD/mg·L－1TOC/mg·L－1NH+4-N/mg·L－1/mg·L－1pHAn=7392．12±34．37－15．91±12．779．48±4．848．55±0．4551．96±11．418．91±1．600．22±0．140．12±0．138．29±0．11Bn=4553．72±55．00－11．08±2．5911．40±10．138．24±0．1546．36±18．508．64±0．520．07±0．040．04±0．028．09±0．352TMPFig．2CharacteristicsofTMPduringtheoperationperiod3．2TMPABSMBＲTMP2．2．TMP11kPaA23．76dB11．16dTMP．MBＲTMP=TMP0·ek·tTMP0kGengetal．2007．ABTMPＲ20．99820．9854．2AB．ATMP18d22d．2TMP．BB．3．3ABSMBＲ3．3ABB11．16d17．30NTU6．25NTU10．61NTU5.79NTUAB1．92NTU11．91NTU1．38NTU8．36NTU．．711343Fig．3Characteristicsofsupernatantturbidityunderdifferentstirringintensities3EPS．B．3－．MBＲHongetal．2007．3．4EPSSMPABSMBＲEPSSMP2．2EPS97．89%80．55%73．8%86．53%．SMP．MBＲＲosenbergeretal．2006．2EPSSMPTable2EPS/SMPofSMBＲunderdifferentstirringintensitiesSMP/mg·L－1EPS/mg·g－1An=32．06±1．9111．98±1．585．68±3．3724．37±8．991．68±1．2311．20±1．016．22±3．2621．61±5．42Bn=29．45±1．657．42±2．6211．24±2．5842．36±10．179．87±0．779．04±0．3311．23±1．7440．31±3．163．5TMPABSMBＲTMP44a8minTMPK1SMBＲ10min144．4bAB10minTMPK2K21．8111SMBＲK2=ΔTMPn1K2SMBＲ10minTMPPa·－1ΔTMPTMPPa·d－1nn=144·d－1K2TMP．4TMPFig．4CharacteristicsofTMPincreasingrateduringtheoperationperiod4aABTMPK1．A1TMPK114435．15Pa·－1B1TMPK145．93Pa·－1．7ATMPK151.08Pa·－1BTMPK1102．43Pa·－1A2．11BTMPK1291．96Pa·－1AK168．78Pa·－1BA．4bBK21．74Pa·－115．97Pa·－1AK2．AB2min、．BK2TMP．SMBＲWuetal．20112012．3．6SMBＲABTMP5．A、B．．TMP．TMP3①②③．5SMBＲTMP、TMP93．64%、4．09%、2.27%．Ｒt=Ｒm+Ｒc+ＲfＲtＲmＲcＲfHuangetal．2008．TMP91134TMPHwangetal．2008．MBＲMengetal．2007．Sunetal．2011．5TMPFig．5CharacteristicsofmembraneresistancecontributionsonTMP4Conclusions1．．2-．．、．3SMBＲTMPTMP93．64%．、．ＲeferencesBaiＲLeowHF．2002．Microfiltrationofactivatedsludgewastewater—theeffectofsystemoperationparametersJ．SeparationandPurificationTechnology292189-198DrewsA．2010．Membranefoulinginmembranebioreactors—CharacterisationcontradictionscauseandcuresJ．JournalofMembraneScience3631/21-28FrlundBPalmgrenＲKeidingKetal．1996．ExtractionofextracellularpolymersfromactivatedsludgeusingacationexchangeresinJ．WaterＲes3081749-1758GaudyAF．1962．ColorimetricdeterminationofproteinandcarbohydrateJ．IndWaterWastes7117-27GengZHallEＲBéerubéPＲ．2007．MembranefoulingmechanismsofamembraneenhancedbiologicalphosphorusremovalprocessJ．JournalofMe