低溶解氧污泥微膨胀节能理论与方法的发现提出及理论基础彭永臻

、1,2,1,2,2,3(1.,　150090;2.,　100022;3.,　610065):,、.,,,,COD、SSTP,.,、,..:;;;;:X703.1　:A　:0250-3301(2008)12-3342-06:2007-12-13;:2008-01-25:(863)(2006AA06Z319);(50778005);(8062006);(EDBS071-53974092);:(1949～),,,,,,E-mail:[e-mail]LimitedFilamentousBulkingUnderLowDissolvedOxygen:Derivation,OriginalityandTheoreticalBasisPENGYong-zhen1,2,GUOJian-hua1,WANGShu-ying2,CHENYing2,3(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,Beijing100022,China;3.CollegeofArchitectureandEnvironment,SichuanUniversity,Chengdu610065,China)Abstract:Howtopreventandcontrolfilamentousbulkingsludgehasbeingaresearchfocusandattractedmuchattention.Todatedespitetheextensiveresearchthathasbeendoneonbulkingsludge,filamentousbulkingstilloccursworld-wideandacomprehensivesolutiondoesnotseemtobeavailable.Particularly,therearefewstudiesaboutmakinguseofthecharacteristicsoffilamentousbacteriaandachievingenergysavingbyfilamentousbulking.Limitedfilamentousbulking,anovelmethodforenergysavingwhileequalorbettertreatmentperformancebyallowingslightandcontrolledfilamentousbulkingsludgeatlowdissolvedoxygen(DO),wasproposedbasedonfull-scalefieldobservations.ThepracticaloperationshowedthatlimitedfilamentousbulkingresultedfromadeclineinDOconcentration.COD,SSandTPremovalcouldbeenhancedandenergysavingcouldbeachievedbylimitedfilamentousbulkingatlowDO.Thederivationoflimitedfilamentousbulkingisintroducedfirstly,andthenthetheoreticalfundamentalsofthetechniqueoflimitedfilamentousbulkingarepresentedandanalyzed,includingtheoccurrenceoflimitedfilamentousbulkingcausedbylowDO,theenhancedeffectoffilamentousbacteriaonpollutantsremovalandtheenergysavingmechanismbyusinglimitedfilamentousbulking.Besides,thepaperprovidessomenewperspectivesabouttheapplicationandresearchdirectionoflimitedfilamentousbulkinginfuture.Keywords:lowdissolvedoxygen;limitedfilamentousbulking;aerationconsumption;filamentousbacteria;biologicalnutrientremoval　　95%50%.,,..,、[1],,[2,3],,、,[4,5],[6～8].,,,[9,10].2912200812　　　　　　ENVIRONMENTALSCIENCEVol.29,No.12Dec.,2008DOI:10.13227/j.hjkx.2008.12.034、.,,,.,[11].,、,,.1　86km2,48,24hm2,20m3d.,、,,.:16d;100%～120%;4000～6000mgL;BOD0.03～0.12kg(kg·d);17h.2000,,,.2002,,,,.,,,.1.,.TP,48.9%76.6%.DO,,MLSS.,,.,,,,.,,,4000～6000mgL,SVI200mLg.SV、SVI、MLSS1.1　Table1　Pollutantsremovalefficienciesbeforeandduringsludgebulking%(6)%(1)%COD90.490.790.7BOD594.894.695.1SS93.094.495.1TN75.068.875.7TP48.976.685.4NH+4-N96.390.691.21　SVI、SVMLSSFig.1　VariationsofSVI,SVandMLSSduringbulkinginaWWTP　　,.AO(anoxicaerobic,),,32,DO2.0mgL0.5～0.8mgL,.,20%,45%75%,、COD、BOD.,,,,,..2　,.,,334312:、,.,,,.,,,.,、,,.、、SVI、(2),DO,,SVI(150～250mLg)..2　Table2　DifferencesbetweenlimitedfilamentousbulkingandseriousfilamentousbulkingSVImL·g-1150～250250DO:、DO、pH、、、CODSS,3　3.1　Chudoba[4,5],.,,,(),.Ksμmax[6],,,.,,[12,13],,.,.,.,[8,9].,.Cenens[7],,,.3.2　3.2.1　COD(1):μ=YμmaxSKs+S-Kd(1),μ、μmax(d-1),Ks,μ=μmax2(mgL),S,DO(mgL),Kd(d-1),Y(kgkg).(1)(Smin):Smin=Kd·Ks(Yμmax-Kd)(2)　　,Ksμmax,Smin,,.,,2,2.S0,(μ1)(μ2),,:μ1=Y1v1(3)μ2=Y2v2(4),v1v2,Y1Y2;(3)(4),v1v2=μ1Y2μ2Y1,Y2Y1,μ1μ2,v1v2,,3344　　　　　　29.2　2Fig.2　Competitionoftwokindsofmicroorganismatdifferentsubstrateconcentration3.2.2　SS,.,“”(pin-pointsludge),,,SS;,SS,,,.,,,.3.2.3　CODSS,.,.,(AOB)(NOB),.,,,.,.,,,[14～16].Hanaki[17],0.5mgL,.,,,.AO,,,,.,,.,.,,[18,19]..,,、PHA,.,,;,.DO0.2mgL.,DO,PHADO,PHAATP,.DO2mgL.,,,DO(1mgL),,.,[20]SBR,SBR,、.BOD[0.26kg(kg·d)],COD85%,96%,PO3-4-P1.0mgL.,.-,,,[21].3.3　334512:、,,,.,,.(5):dcdt=KLα(cs-c)(5),KLα(1h),csc(mgL).,,,.,,.,,,.4　、,(),,,.,,,.,DO.,()、NP、(pH)、SS.DO,,(、)DO,,.,.,.5　(1),,,,COD、SSTP.(2),、,.(3),.:[1]　MartinsAMP,PagillaK,HeijnenJJ,etal.Filamentousbulkingsludge-acriticalreview[J].WaterRes,2004,38:793-817.[2]　EikelboomDH.Processcontrolofactivatedsludgeplantsbymicroscopicinvestigation[M].London,UK:IWAPublishing,2000.[3]　JenkinsD,RichardMG,DaiggerGT.Manualonthecausesandcontrolofactivatedsludgebulkingandothersolidsseparationproblems[M].(3rdedition).London,UK:IWAPublishing,2004.1-7.[4]　ChudobaJ,OttováV,MaderaV.Controlofactivatedsludgefilamentousbulking-Ⅰ.Effectofthehydraulicregimeordegreeofmixinginanaerationtank[J].WaterRes,1973,7:1163-1182.[5]　ChudobaJ,GrauP,OttaváV.Controlofactivatedsludgefilamentousbulking-Ⅱ.Selectionofmicroorganismbymeansofaselector[J].WaterRes,1973,7:1389-1406.[6]　ChieasC,RobertL.GrowthandControlofFilamentousMicrobesinActivatedSludge:AnIntegratedHypothesis[J].WaterRes,1985,19(4):68-72.[7]　CenensC,SmetsIY,RyckaertV,etal.Modelingthecompetitionbetweenfloc-formingandfilamentousbacteriainactivatedsludgewastewatertreatmentsystems-Ⅰ.Evaluationofmathematicalmodelsbasedonkineticselectiontheory[J].WaterRes,2000,34(9):2525-2534.[8]　CenensC,SmetsIY,VanImpeJF.Modelingthecompetitionbetweenfloc-formingandfilamentousbacteriainactivatedsludgewastewatertreatmentsystems-Ⅱ.Aprototypemathematicalmodelbasedonkineticselectionandfilamentousbackbonetheory[J].WaterRes,2000,34