搜索
26120071ENVIRONMENTALCHEMISTRYVo.l26,No.1January2007(2006810).*863(Z0005186040421),,.**,Emai:lpyz@bjuteducnA/O*彭永臻**吴学蕾马勇(,,,100022)A/OC/N,SRT15d,2125,pH7276,25004500mgl-1,(DO).DO(07mgl-1).,.DO,,DO,,,.pH(FA),DO.,A/O,,.,.A/OC/N,.A/O,,.1A/O,300L,25%,75%.,8,2,6..,,DO.,.,..COD5B3,NH3N,NO-3,NO-2N(1),pHDOWTWOxi330i.C/N,2535.COD200300mgl-1,(TN)7090mgl-1,NH3N6080mgl-1,pH7276.085,20.SRT15d,COD50mgl-1,25004500mgl-1.2DO(DO).,,DO.DO,,[1].DO,,,.1,1826DO,,.DO05mgl-1,42252220%.2DO,DO,DO..,20%,10%,,,4,1..,,DO04mgl-1,DO03mgl-1,,DO.DO05mgl-1,DO07mgl-1.0204mgl-1,1215mgl-1[2],DO02mgl-1,,DODO,,DODO.,DO,.3SVI,DO,DO,,,,.3(SVI).3,,DO(03mgl-1),(2%50%),,SVI,SVI80mlg-1195mlg-1.,,,.DO,SVI,,150mlg-1,,.,DO,,DO,,,.4DO4DO.5751076mgl-1,738mgl-1,129724mgl-1,420mgl-1,212848%,45%,,,C/N1:A/O19,,;,DO(03mgl-1),.DO,,60%,80%,A/O.,40%[3],,C/N,,,.52125,[4],.,,2122.25004500mgl-1,SRT15d,,.pH87[5].pHpH,.pH7276,pH,.,pH..0110mgl-1,10mgl-1.,40mgl-1(FA)[6].5FA,,A/O,pH,FA.FA022159mgl-1,064mgl-1,,,FA,05mgl-1,.FA.20266(1)A/O,2125,25004500mgl-1,SRT15d,pH7276,DO.(2)DO,.,,DODO,DO(07mgl-1).(3)DO,DO,,DO,,,.[1]HanakiK,WantawinC,OhgakiS,NitrificationatLowLevelsofDissolvedOxygenwithandwithoutOrganicLoadinginaSuspendedGrowthReactorWatRes,1990,24(3)297302[2],,,DO,2002,18(5)1315[3],,,,2003,9(4)444447[4],,:,2005,418419[5]VoetsJP,VanstaenH,VerstraeteW,RemovalofNitrogenfromHighlyNitrogenousWastewatersJournalofWaterPollutionControlFederation,1975,47394398[6],,,,2006,32(3)2627DISAPPEARANCEANDRECURRENCEOFNITRITEACCUMULATIONINPILOTSCALEA/OPROCESSPENGYongzhenWUXueleiMAYong(KeyLaboratoryofBeijingWaterEnvironmentRecovery,BeijingUniversityofTechnology,Beijing,100022,China)ABSTRACTWastewateroflowC/NratiowastreatedbyA/Oprocess,SRTwasabout15days,thetemperature,pHandMLSSwerebetween21to25,72to76,2500to4500mgl-1respectivelyTheexperimentachievednitriteaccumulation,disappearanceandrecurrencebycontrollingtheDOconcentrationeffectivelyattwotimesRecurrenceofnitriteaccumulationoccurredatlowDOconcentration(07mgl-1)Themorecompletelydisappearanceofnitriteaccumulation,themuchtimewascosttorecuritLowDOwasnotalwaysbringoutseveresludgebulking,becausetheammoniaoxidizedbacteriausedthelimitedDOsufficientlyandpredominatedinwastewaterforlongperiod,sothesedimentationcapabilityofsludgewasgoodandseveresludgebulkingdidnotoccurIntheendDOwasthekeyfactorthataffectingnitriteaccumulationbyanalyzingotherfactors,iepH,freeammonia(FA)concentration,temperatureKeywords:biologicalnitrogenremova,lA/Oprocess,nitrite,dissolvingoxygen.