AO生物脱氮工艺处理生活污水中试二系统性能和SND现象的研究

26520065ActaScientiaeCircumstantiaeVol.26,No.5May,2006:2()(No.50521140075);SupportedbytheKeyInternationalCooperativeProjectofNSFC(No.50521140075)andtheOpenProjectofKeyLaboratoryofBeijing:(1976),,;3(),E2mail:[e-mail]:MAYong(1976),male,Ph.D.;3Correspondingauthor,E2mail:[e-mail],,.2006.A/O()SND[J].,26(5):710-715MaY,PengYZ,YuDS.2006.A/Opilot2scalenitrogenremovalprocesstreatingdomesticwastewater.ThestudyofsystemcharacteristicsandSND[J].ActaScientiaeCircumstantiae,26(5):710-715A/O()SND1,1,2,3,31.,,1500902.,,1000223.,266071:2005208219:2006203221:2006203221:A/O,DO.,DOCOD85%92%.C/N2.93,64%,,15%85%,12%..DO,5%12%,DO(SND).:A/O;;DO;;:025322468(2006)0520710206:X70311:AA/Opilot2scalenitrogenremovalprocesstreatingdomesticwastewater.ThestudyofsystemcharacteristicsandSNDMAYong1,PENGYongzhen1,2,3,YUDeshuang31.SchoolofMunicipalandEnvironmentalEngineering,HarbininstituteofTechnology,Harbin1500902.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing1000223.SchoolofTechnology,QingdaoUniversity,Qingdao266071Received19Augest2005;receivedinrevisedform21March2006;accepted21March2006Abstract:TheCOD,ammoniaandtotalnitrogen(TN)removalefficiencywerestudiedinthepaperatlowDOconcentrationinapilot2scaleA/Onitrogenremovalplanttreatingdomesticwastewater.TheexperimentalresultsshowedthattheCODandammoniaremovalefficiencyreach85%and92%,respectively.BecauseofthelowinfluentCOD/TNratio(2.93),theaverageTNremovalefficiencywasonly64%,whileTNremovalefficiencycouldbeincreasedby12%withthenitriteaccumulationratioincreasedfrom15%to85%.Agoodcorrelationofammoniaremovalefficiency,nitrificationrateandTNremovalefficiencywasfound.Simultaneousnitrificationanddenitrification(SND)withnitriteatlowDOlevelcouldberealized,whichcontributedto5%12%TNnitrogenremovalbasedonnitrogenmassbalance.TheSNDwouldbedamagedwiththeDOincreased,andthemechanismofSNDwithnitritewaspresented.Keywords:A/Onitrogenremovalprocess;domesticwastewater;DO;pilotplant;simultaneousnitrificationanddenitrification(SND)(2006),DO(0.30.7mgL-1)A/O.25%,40%,DO,5:A/O()SND,.,A/O,.,DO(SND)(Pochanaetal.,1999;Holman,2005),A/OSND,,DOSND.1(Studyofsystemcharacteristics)1.1CODCr1A/OCODCr.CODCr163.2389.5mgL-1,248.6mgL-1,CODCr5.070.7mgL-1,40mgL-1,,CODCr(GB18918-2002).CODCr72.9%97.8%,85%,COD,DO.,75%,10%.,DO.COD,,,,.,,SS,CODCr.1A/OCODFig.1TheCODremovalefficiencyofA/Opilotplant1.22,2A/OFig.2TheammoniaremovalefficiencyofA/Opilotplant65.4105.7mgL-1,79.1mgL-1,020.1mgL-1,6.5mgL-1,77%100%,91.8%,,DO.DO,100%,(GB18918-2002).,,DO(2mgL-1).,,,1121.5mgL-1,,DO.,0.20.4mgL-1,DO,.,,DO2mgL-1,,DO.DO,,DO15%.1.3A/O3A/O.68.5110.2mgL-1,84.9mgL-1,154617mgL-1,29.8mgL-1,4614%80%,64%,,COD,COD/TN2.93,,,.1172640%,C/N,,,.3A/OFig.3TheTNremovalefficiencyofA/Opilotplant1.44,,,,,,,.40%,,,.(15%30%)56%,(85%),68%,12%.,.4Fig.4TherelationbetweennitriteaccumulationandTNremovalefficiency1.55,,,,,.,,,,,.,,,,,,,.,,.5Fig.5TherelationbetweenammoniaandTNremovalefficiency6Fig.6Therelationbetweenammoniaremovalefficiencyandnitrificationrate1.66,,,.,,,2175:A/O()SND.1.77,,,,.,,.,30%70%,0,,5%15%.,.7Fig.7TherelationbetweenTNremovalefficiencyanddenitrificationrate2A/O/(SNDwithnitritepathwayinA/Oprocess)SND,.SNDSND,(SND)(Hyungseoketal.,1999).DO,,DOpH.8DO(0.47mgL-1),,DOpH.TKN82.7mgL-1,COD240mgL-1,3,5,MLSS3500mgL-1,2,0.5.8DO0.47mgL-1DOpHFig.8ThevariationofnitrogencompoundsconcentrationandDOandpHwhenDOconcentrationequalto0147mgL-1DO0.30.7mgL-1,0.47mgL-1.,17.6mgL-14.3mgL-1,98Fig.9Thenitrogenmassbalanceofthecorrespondingfigure8(TKNi,NO-x,inf,TKNe,NO-x,e,Nsludge,NDN,NSND.:NSND=TKNi+NO-x,inf-TKNe-NO-x,e-Nsludge-NDN)80.5%.,,,pH,pH.,,.9,,7.7%,3172656.8%,9.5%,SND.DO,DOA/OSND,5%12%.10DO1.7mgL-1DOpHFig.10ThevariationofnitrogencompoundsconcentrationandDOandpHwhenDOconcentrationequalto1.7mgL-110DO(1.7mgL-1),,DOpHORP.TKN90.9mgL-1,COD236mgL-1,2,6,MLSS3700mgL-1,2.5,0.75.DO1.7mgL-1.TKN6.5mgL-1,27.3mgL-14.7mgL-1,,85%.,,38.8mgL-1,38.5mgL-1.11,SND,DO,.DO1.2mgL-1,SND,,,DOSND.DO,SND,.1110Fig.11Thenitrogenmassbalanceofthecorrespondingfigure103(Conclusions)1)DOA/O,85%92%.,DO.,DO,DO15%.2),,.15%30%85%,12%.,;,,,,.3)DOSND.SNDDO.DO0.30.7mgL-1,5%12%SND.DO1.2mgL-1,SND.References:HolmanJB,WarehamDG.2005.COD,ammoniaanddissolvedoxygentimeprofilesinthesimultaneousnitrification/denitrificationprocess[J].BiochemicalEngineeringJournal,22(2):125133HyungseokYoo1,Kyu2hongAhn,Hyung2jibLee,etal.1999.Nitrogenremovalfromsyntheticwastewaterbysimultaneousnitrificationanddenitrification(SND)vianitriteinanintermittently2aeratedreactor[J].WatRes,33(1):145154HwangSunjin,HanakiKeisuke.2000.Effectsofoxygenconcentrationandmoisturecontentofrefuseonnitrification,denitrificationandnitrousoxideproduction[J].BioresourceTechnology,71(2):1591654175:A/O()SNDMaY,WangSY,ZengW,etal.2006.A/Opilot2scalenitrogenremovalprocesstreatingdomesticwastewater:,Thestudyofshort2cutnitrificationanddenitrification[J].ActaScientiaeCircumstantiae,26(5):(inChinese)Pochana,Klangduen,KellerJrg.1999.Studyoffactorsaffectingsimultaneousnitrificationanddenitrification(SND)[J