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1,2,1,2,2,3(1.,150090;2.,100022;3.,610065):,.,,,,CODSSTP,.,,..:;;;;:X70311:A:025023301(2008)1223342206:2007212213;:2008201225:(863)(2006AA06Z319);(50778005);(8062006);(EDBS07P1253974092);:(1949),,,,,,E2mail:pyz@bjut.edu.cnEnergySavingAchievedbyLimitedFilamentousBulkingUnderLowDissolvedOxygen:Derivation,OriginalityandTheoreticalBasisPENGYong2zhen1,2,GUOJian2hua1,WANGShu2ying2,CHENYing2,3(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China;3.CollegeofArchitectureandEnvironment,SichuanUniversity,Chengdu610065,China)Abstract:Howtopreventandcontrolfilamentousbulkingsludgehasbeingaresearchfocusandattractedmuchattention.Todatedespitetheextensiveresearchthathasbeendoneonbulkingsludge,filamentousbulkingstilloccursworld2wideandacomprehensivesolutiondoesnotseemtobeavailable.Particularly,therearefewstudiesaboutmakinguseofthecharacteristicsoffilamentousbacteriaandachievingenergysavingbyfilamentousbulking.Limitedfilamentousbulking,anovelmethodforenergysavingwhileequalorbettertreatmentperformancebyallowingslightandcontrolledfilamentousbulkingsludgeatlowdissolvedoxygen(DO),wasproposedbasedonfull2scalefieldobservations.ThepracticaloperationshowedthatlimitedfilamentousbulkingresultedfromadeclineinDOconcentration.COD,SSandTPremovalcouldbeenhancedandenergysavingcouldbeachievedbylimitedfilamentousbulkingatlowDO.Thederivationoflimitedfilamentousbulkingisintroducedfirstly,andthenthetheoreticalfundamentalsofthetechniqueoflimitedfilamentousbulkingarepresentedandanalyzed,includingtheoccurrenceoflimitedfilamentousbulkingcausedbylowDO,theenhancedeffectoffilamentousbacteriaonpollutantsremovalandtheenergysavingmechanismbyusinglimitedfilamentousbulking.Besides,thepaperprovidessomenewperspectivesabouttheapplicationandresearchdirectionoflimitedfilamentousbulkinginfuture.Keywords:lowdissolvedoxygen;limitedfilamentousbulking;aerationconsumption;filamentousbacteria;biologicalnutrientremoval95%50%.,,..,[1],,[2,3],,,[4,5],[68].,,,[9,10].2912200812ENVIRONMENTALSCIENCEVol.29,No.12Dec.,2008.,,,.,[11].,,,.186km2,48,24hm2,20m3Pd.,,,.:16d;100%120%;40006000mgPL;BOD01030112kgP(kgd);17h.2000,,,.2002,,,,.,,,.1.,.TP,4819%7616%.DO,,MLSS.,,.,,,,.,,,40006000mgPL,SVI200mLPg.SVSVIMLSS1.1Table1PollutantsremovalefficienciesbeforeandduringsludgebulkingP%(6)P%(1)P%COD901490179017BOD5941894169511SS931094149511TN751068187517TP481976168514NH+42N9613901691121SVISVMLSSFig.1VariationsofSVI,SVandMLSSduringbulkinginaWWTP,.APO(anoxicPaerobic,P),,32,DO210mgPL015018mgPL,.,20%,45%75%,CODBOD.,,,,,..2,.,,343312:,.,,,.,,,.,,,.SVI(2),DO,,SVI(150250mLPg)..2Table2DifferencesbetweenlimitedfilamentousbulkingandseriousfilamentousbulkingSVIPmLg-1150250250DO:DOpHCODSS,3311Chudoba[4,5],.,,,(),.Ksmax[6],,,.,,[12,13],,.,.,.,[8,9].,.Cenens[7],,,.31231211COD(1):=YmaxSKs+S-Kd(1),max(d-1),Ks,=maxP2(mgPL),S,DO(mgPL),Kd(d-1),Y(kgPkg).(1)(Smin):Smin=KdKsP(Ymax-Kd)(2),Ksmax,Smin,,.,,2,2.S0,(1)(2),,:1=Y1v1(3)2=Y2v2(4),v1v2,Y1Y2;(3)(4),v1v2=1Y22Y1,Y2Y1,12,v1v2,,443329.22Fig.2Competitionoftwokindsofmicroorganismatdifferentsubstrateconcentration31212SS,.,(pin2pointsludge),,,SS;,SS,,,.,,,.31213CODSS,.,.,(AOB)(NOB),.,,,.,.,,,[1416].Hanaki[17],015mgPL,.,,,.APO,,,,.,,.,.,,[18,19]..,,PHA,.,,;,.DO012mgPL.,DO,PHADO,PHAATP,.DO2mgPL.,,,DO(1mgPL),,.,[20]SBR,SBR,.BOD[0126kgP(kgd)],COD85%,96%,PO3-42P110mgPL.,.2,,,[21].313543312:,,,.,,.(5):dcdt=KL(cs-c)(5),KL(1Ph),csc(mgPL).,,,.,,.,,,.4,(),,,.,,,.,DO.,()NP(pH)SS.DO,,()DO,,.,.,.5(1),,,,CODSSTP.(2),,.(3),.:[1]MartinsAMP,PagillaK,HeijnenJJ,etal.Filamentousbulkingsludge2acriticalreview[J].WaterRes,2004,38:7932817.[2]EikelboomDH.Processcontrolofactivatedsludgeplantsbymicroscopicinvestigation[M].London,UK:IWAPublishing,2000.[3]JenkinsD,RichardMG,DaiggerGT.Manualonthecausesandcontrolofactivatedsludgebulkingandothersolidsseparationproblems[M].(3rdedition).London,UK:IWAPublishing,2004.127.[4]ChudobaJ,OttovV,MaderaV.Controlofactivatedsludgefilamentousbulking2.Effectofthehydraulicregimeordegreeofmixinginanaerationtank[J].WaterRes,1973,7:116321182.[5]ChudobaJ,GrauP,OttavV.Controlofactivatedsludgefilamentousbulking2.Selectionofmicroorganismbymeansofaselector[J].WaterRes,1973,7:138921406.[6]ChieasC,RobertL.GrowthandControlofFilamentousMicrobesinActivatedSludge:AnIntegratedHypothesis[J].WaterRes,1985,19(4):68272.[7]CenensC,SmetsIY,RyckaertV,etal.Modelingthecompetitionbetweenfloc2formingandfilamentousbacteriainactivatedsludgewastewatertreatmentsystems2.Evaluationofmathematicalmodelsbasedonkineticselectiontheory[J].WaterRes,2000,34(9):252522534.[8]CenensC,SmetsIY,VanImpeJF.Modelingthecompetitionbetweenfloc2formingandfilamentousbacteriainactivatedsludgewastewatertreatmentsystems2.Aprototypemathematicalmodelbasedonkineticselectionandfilamentousbackbonetheory[J].WaterRes,2000,34(9):253522541.[9],,,.[J].,2006,26(5):54256.[10],.[J].,1999,7(1):88293.[11].[D].:,2004.1162123.[12]MartinsAMP,HeijnenJJ,vanLoosd