Carrousel氧化沟内DO变化规律及其优化控制条件刘艳臣

2008,28(9)843~846ChinaEnvironmentalScienceCarrouselDO1,1*,1,2,2,2(1.,,1000842.,230088),Carrousel(DO),DO.,DO,DO,0.3~0.5,.Carrousel(SND)(DO)X703.1A10006923(2008)09084304VariationofdissolvedoxygenandoptimumcontrolconditionsinCarrouseloxidationditch.LIUYan-chen1,SHIHan-chang1*,WANGZhi-qiang1,WANGGan2,DAIXian-liang2,WANGYing-zhe2(1.StateKeyJointLaboratoryofEnvironmentSimulationandPollutionControl,DepartmentofEnvironmentalScienceandEngineering,TsinghuaUniversity,Beijing100084,China2.GuozhenEnvironmentalProtectionCompany,Hefei230088,China).ChinaEnvironmentalScience,2008,28(9)843~846AbstractToenhancetheefficiencyofremovalofnitrogen,thedistributionandprocessoftransferofdissolvedoxygenwascarriedoutinarealCarrouseloxidationditch.Theoptimumconditionofoxygenfortheoccurrenceofsimultaneousnitrificationanddenitrification(SND)wascarriedoutinapilot-scaleoxidationditch.Theinfluenceofthefluctuationofinfluentandcontrolofaeratorsonthedistributionofdissolvedoxygenintheditchwasobvious.ThecharacteristicsofdistributionandtransferofdissolvedoxygenintheditchwerefeasibleforoccurrenceofSND.Theproportionoftheaerobicvolumefractionchangedfrom0.3to0.5correspondingtoanoptimalrangefortheremovaloftotalnitrogen,theproportionincreasedwiththedecreaseofhydraulicretentiontime.KeywordsCarrouseloxidationditchsimultaneousnitrificationanddenitrificationdissolvedoxygen,Carrousel[1].Carrousel2000Carrousel3000[2],,.,,[36].(DO)[78].(SND),DO,DOSND,,DO.11.1Carrousel(1)[7].,,14t(2),1.2m3(1).,SNDDO,4Carrousel,.2.20080305863(2004AA601060)*,,[e-mail]84428xzy456dafc321be1Fig.1Distributionofthetestposition1~6;a~f;x,y,z1Table1Technicalparametersofoxidationditch(m)(m)(m)89.67.43.915.01.91.12()Table2EffectsofoperationofoxidationditchCOD(mg/L)SS(mg/L)NH3N(mg/L)NO3N(mg/L)TP(mg/L)2769819.66.51.9401515.47.30.71.2DO,,,DO.,10,3,90(1).11~6,DO.2DO,13(a,c,e),25(f).DO,3(KLa)(OUR).,.,,DO,.DODO.,,(1)OURKLa.Lsd[DO()][DODO()]OURdtKatt=−−(1):DODO,mg/L;KLa,min1;DOsDO,mg/L;OUR,mg/(L⋅min);t.2,20,YSI58DO.22.1DO2.01.51.00.500102030405060708090(a)1DO(mg/L)0.51.52.53.54.50102030405060708090(m)(b)2DO(mg/L)2DOFig.2Changeofdissolvedoxygenindifferentunitsy=1.205,z=0.5y=1.205,z=3.19y=4.215,z=1.95y=5.825,z=0.5y=5.825,z=3.19y=1.205,z=1.95y=4.215,z=0.5y=4.215,z=3.19y=5.825,z=1.959CarrouselDO845,2DO2.,DO,.DO,1,,2,.,SNDDO0.8mg/L[910],,,SND,.2.2DO3(1,1,2,3)3(1,4,5,6)KLaOUR.3,,KLaOUR,KLaOUR.OURDO,DO.DO.DO.KLaOUR,SND.[11],,DO0.4mg/L(50~100µm).,KLaOUR,,SND.3KLaOURTable3LKaandOURatthedifferentlocationofoxidationditch123456KLa(min1)0.150.120.110.200.170.18OUR[g/(L⋅min)]0.910.710.701.441.301.262.3DO1d,DO[7].3DO,,DO,5~6h,;,DO,7~8h,,.,,,.100806040200DO(%)2:005:0010:0012:0014:0017:0019:0022:003DOFig.3VolumetricpropotionsofdifferentrangeofDOatdifferenttimeDO0.5mg/L0.5DO2mg/LDO2mg/L2.4DO,DO,;DO,,,.,SNDDO,(HRT)SND.4,DO,NH3NGB18918-2002[12]B(8mg/L20mg/L).5,HRT,SND0.3~0.5,HRT,.84628706050403020100081015202530(d)(mg/L)TCODNH3N4Fig.4Effectofoperationofpilot-scaleoxidationditch35791113151719212325270123456HRT(h)(d)HRTHRT05SNDFig.5OptimalproportionsofaerobicwithanoxicvolumeforSNDinasinglechannelofoxidationditch33.1DO,SND;,,SNDDO.3.2,,SND,SND0.3~0.5,HRT,.[1]KootACJ,ZeperJ.Carrousel,anewtypeofaerationsystemwithloworganicload[J].Water.Res.,1972,6:401406.[2],,.Carrousel[J].,2002,28(2):1921.[3]RittmanBE.Simultaneousdenitrificationwithnitrificationinsingle-channeloxidationditches[J].Wat.Pollut.ControlFed.,1985,57(4):300308.[4]HAOX,HansJ,JohanW.Conditionsandmechanismsaffectingsimultaneousnitrificationanddenitrificationinapasveeroxidationditch[J].Bioresour.Technol.,1997,59:207215.[5]GAOS,PengY,DongW,etal.Pilotstudiesoffactorsinfluencingthesimultaneousnitrificationanddenitrificationinanoxidationditchtreatingthedomesticwastewateratlowcost[C]//Futureurbanwastewatersystem-decentralisationandreuse.Xi’an:IWAconference,2005:1820.[6],,,.Carrousel[J].,2006,7(12):4245.[7],,,.Carrousel[J].,2007,27(6):792796.[8],,.[J].,2003,15(3):2426.[9]KatieAT,NataiteB,RalfC-R.SimulatneousnitrificationanddenitrificationUsingStoredSubstrate(PHB)astheelectronDonorinanSBR[J].Biotechnol.Bioeng.,2003,83:706720.[10]KlangduenP,KellerJ.Studyoffactorsaffectingsimultaneousnitrificationanddenitrification(SND)[J].Wat.Sci.Tech.,1999,39(6):6168.[11]RikkeL,MeyerR,JianxiongZ,etal.Challengesforsimula-taneousnitrificationanddenitrificationandphosphorusremovalinmicrobialaggregates:masstransferlimitationandnitrousoxideproduction[J].FEMSMicrobiologyEcology,2005,52(3):329338.[12]GB189182002[S].(1980),,,,.5.