初沉污泥作为生物脱氮除磷快速碳源的转化因素研究吴一平

37　4200512西安建筑科技大学学报()J.Xi’anUniv.ofArch.&Tech.(NaturalScienceEdition)Vol.37　No.4Dec.2005吴一平,王旭东(,710055)　:.,2.13%,33℃,HRT3d,pH5.5～6.5,13.6%,VFA0.102mgVFA(COD)/mgCOD;,2.20%,33℃,pH,HRT2d,20.59%,VFA0.152mgVFA(COD)/mgCOD..:初沉污泥;水解;有机碳源;脱氮除磷:X703.1　　　　:A　　　　:1006-7930(2005)04-0501-04　StudyonprimarysludgehydrolysisasbiologicalnitrogenandphosphorousremovalWUYi-ping,WANGXu-dong(SchoolofEnvir.&Muni.Eng.,Xi'anUniv.ofArch.&Tech.,Xi'an710055,China)Abstract:AsavaluablecarbonsourceforsubsequentN-Premovalprimarysludgehydrolysiscanprovidethesolubleorganics.Bychangingthesolidsconcentrationofprimarysludge,temperatureandhydraulicretentiontimetodiscusstheoptimisticcondition,underwhichthehighestVFAyieldcanbeachieved.Theexperimentalresultsshowedthata13.6%ofnetSCODproductionintermsofinitialsludgeTCODcanbeobtainedinasemi-continuousandcompletelymixedfermentoroperatingwith2.13%ofsolidconcentration,3dofHRT,5.5～6.5ofpHat33℃.Underthiscondition,netVFAyieldis0.102mgVFAasCOD/mginitialsludgeTCOD;b)Afterthepre-treatment-disintegrationofprimarysludge,20.59%ofnetSCODproductionintermsofinitialsludgeTCODcanbegainedinthesamefermentoroperatingwith2.20%ofsolidconcentration,2dofHRT,5.5～6.5ofpHat33℃.Meanwhile,netVFAyieldisasmuchas0.152mgVFAasCOD/mginitialsludgeTCOD.Keywords:primarysludge;hydrolysis;organiccarbon;nitrogenandphosphorusremoval,、UCT、MLE、BardenphoSBR.,C/N,.(),,COD.,:2004-07-01:(00JK249):(1979-),,,,.DOI:10.15986/j.1006-7930.2005.04.013.,.、[1,2](),,.,,.1/3;,1/5,.(、、).1　研究方法1.1　4.0L,..、、,η.ηCOD(CODS)COD(CODT),η=CODS/CODT.1.2　CODCr:;VFA:;MLSSMLVSS:;:.2　结果与分析2.1　图1　不同HRT下温度对转化率的影响Fig.1　EffectoftemperatureonSCODproductionunderdifferentHRT,,,.,,,,.,9400mgMLVSS/L,(1d、2d、3d),(17℃、25℃、33℃)1.,3d,,(),17℃、25℃、33℃,8.39%、9.73%12.15%.17～25℃25～33℃,35℃.2.2　(HRT)HRT.,,.1,17℃,HRT1d,3.5%;HRT3d,9.73%,2.33℃,HRT1d,8.39%;HRT3d,12.15%,50%.,,HRT.,HRT,,.,3d.2.3　、,.233℃、3d,.,,,2.13%,(13.6%),VFA0.102mgVFA(COD)/mgCOD.,,,,,;,HRT,,.502　　　　　　　　　　　　　　　()　　　　　　　　37图2　初沉污泥含固率对其水解转化率的影响Fig.2　EffectofsolidconcentrationonSCODproduction,2.13%,.2.89%0.6%.,,2.0%～3.0%,.,.2.4　[3],.,,,.Chyi[4],.,0.02mm0.05mm1.5～2.0.,.,,.2.4.1　粉碎前后初沉污泥的粒径分布图3　初沉污泥粉碎前后的粒径分布Fig.3　Particlesizedistributionofprimaryslugefollowthesrush(COD)3.,0.065～0.3mm51.29%;0.0385mm25.78%.,,0.0385mm64.04%,.2.4.2　不同粒径分布对水解转化效率的影响,2.20%,33℃,4.HRT3d,13.6%;,,HRT1d,15.7%,,HRT3d2.1%,HRT2d,20.59%,,HRT3d1.51,VFA0.152mgVFA(COD)/mgCOD.图4　粒径对初沉污泥水解转化率的影响Fig.4　EffectofparticlesizedistributiononSCOD,,1/3.3　结　论:①,,,COD.,.②,:2.13%,33℃,3d,pH5.5～6.5.,13.6%,VFA0.102mgVFA(COD)/mgCOD.(下转第508页)5034:图4　实验值Nue与关联式计算Nuc值的对比Fig.4　ThecomparisionbetweenexperimentalNucandcalculationNue(2),4#(d=4mm,s1=40mm,s2=7.5mm),Nu159%,2.(3),.:[1]　.[M].:,1985.[2]　.[M].:,1995.[3]　.[M].:,1990.[4]　PatankarSV,LiuCH,SparrowEM.Fully-developedFlowandHeatTransferinDuctsHavingStreamwise-PeriodicVariationsofCross-SectionalArea1[J].TransactionsofASMEJournalofHEATTransfer.1997,99(5):180-187.[5]　JunFuKai,OsamuMiyatake.Laminer-flowHeatTransferwithinParallel-PlateChannelwithStaggeredBaffles[J].HeatTransfer-JapaneseResearch,1993,22(2):171-183.[6]　HabibMA.ExperimentInvestigationofHeatTransferandFlowOverBafflesofDifferentHeights[J].TransactionsofASMEJournalofHEATTransfer,1998,99(5):250-258.[7]　LopezJR,AnandNK,FletcherLS.HeatTranferinathree-dimensionalchannelwithbafflesNumerical[J].HeatTransferPartA,1996,30(2):189-205.[8]　WebbBW,RamadhyaniS.ConjugateHeatTransferinChannelWithStaggeredRibs[J].InternationalJournalofHeatandMassTransfer,1985,28(9):1679-1687.[9]　BISWASG,TonK,FUJND.Numericalandexperimentaldeterminationofflwstructureandheattransfereffectsoflongitudinalvorticesinachannelflow[J].INT.J.Heatmasstransfer,1996,39(16):3441-3451.[10]　[]BA.,.[M].:,1982.[11]　.[D].:,2004.[12]　.[M].:,2002.[13]　.[M].:,2001.[14]　.[M].:,2000.(编辑　李　斌)(上接第503页)③,,.:2.20%,33℃,2d,pH5.5～6.5.,20.59%,VFA0.152mgVFA(COD)/mgCOD.:[1]　,,.[J].,2002,():283-286.[2]　,　,./[J].(),2004,36(4):421-423.[3]　BanisterSS,PretoriusWA.Optimisationofsludgeacidogenicfermentationforbiologicalnutrientremoval[J].WaterSA,1998,24(1):35-42.[4]　ChyiYT,DagueRR.Effectsofparticulatesizeinanaerobicacidogenesisusingcelluloseasasolecarbonsource[J].WaterEnvir.Res,1994,66:670-678.(编辑　李　斌)508　　　　　　　　　　　　　　　()　　　　　　　　37