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29420088JournalofNorthChinaInstituteofWaterConservancyandHydroelectricPowerVol129No14Aug.2008:2008-04-30:A(05L024).:(1981),,,,.:1002-5634(2008)04-0091-03,,(,116622):,,,,.:(2025),(pH=8),(C/N=3),(M(DO)=1.01.5mg/L),,70%84%,80%,.:;;:X703:B,,,,.2().[1-2],25%40%,63%30%40%..,,,.(FA)(DO)pH,.[3-4],[5],.,,.11.1.,,,,.1,PVC4,150mm,800mm,200mm.2(2),2,,..,.(1525).1.2,,1.(NH4)2SO4,;350mg/L.11/(mgL-1)/(mgL-1)KH2PO420.0MgSO47H2O40.0CaCl240.0FeCl31.3EDTA1500.0H3BO4140.0ZnSO47H2O15.0MnCl27H20990.0CuSO45H2O250.0NH4MoO4H2O220.0NiCl2199.01.3,MLSS40005000mg/L,.560L/d,12h.1120L/d560L/d.1.52.0mg/L,pH7.5.2:25d,NH+4N70mg/L;20d,NH+4N120mg/L.,.1.4COD,NH+4N,NO-2N,NO-3N,TN,[6],pHPHS-2C,DO,.22.145dNH+4N120mg/L,C/N3,DO1.01.5mg/L,pH8.0,2225,25d(70),,25.23,30d,84%,65%,(=()/)70%84%;16.019.5mg/L,3.56.3mg/L,23.0mg/L,.45,1,2920088,80%95%.CODNOXN2.560.4,3.76.6[7],C/N.2.2DODO.,DO,6.6DO6,,,;DO1.36mg/L,();DO2.26mg/L;DO0.81.5mg/L,.311,;DO1.01.5mg/L,C/N3,pH8,2225,70%84%,84%,65%;,.21DO.DO0.81.5mg/L,,,80%.[1]BaeW,ChungJW.Ashortcutbiologicalnitrogenremovalinabiofilmreactorbysuppressingnitriteoxidation[J].J.Biodegradation,2002,10:349-356.[2]TurkO,MavinicDS.Maintainingnitritebuild2upinasys2temacclimatedtofreeammonia[J].J.WaterRes.,1989,23(11):1383-1388.[3],,,.A/O()[J].,2006,26(5):703-709.[4]TurkOMavinicDS.Stabilityofnitritebuild2upinanacti2vatedsludgesystem[J].J.Wat.Pollut.ControlFed.,1989,61:1440-1448.[5].[J].,2005,31(3):167-168.[6].[M].:,1989.[7]TamNFY,WongYS,LeungG.Effectofexogenouscar2bonsourcesonremovalofinorganicnutrientbythenitrifi2cationdenitrificationprocess[J].J.WaterRes.,1992,26:1229-1236.ExperimentalStudyonRealizingtheShortcutDenitrificationinanImprovedBiologicalContactOxidationReactorRONGZhong2yuan,ZHUBo,XUJi2run(CollegeofEnvironmentalandChemicalEngineering,DalianUniversity,Dalian116622,China)Abstract:Accordingtotheshortcutdenitrificationtheoryandtheoperationalcharacteristicsofbiologicalcontactoxidation(BCO),someimprovementsinbothconstructureandfluidconditionaremadeinatraditionalBCOreactor,andthenthefeasibilityandperform2anceparametersofshortcutdenitrificationareexaminatedexperimentallyontheimprovedreactoratnormaltemperatureforanartificialwastewater.Theresultsshowthatattemperatureof2025,pH=8,C/N=3,shortcutdenitrificationcouldberealizedsatisfactorilybycontrollingtheconcentrationDOat1.01.5mg/L.Atthattimetheaccumulationrateofnitriteisto70%84%,andthetransformrateofamino2nitrogenisabove80%.TheexperimentsconfirmthattheshortcutdenitrificationinanimprovedBCOreactorispractica2ble,thefeaturesandadvantagesofthetwoprocessesarecompatible.Keywords:improvedbiologicalcontactoxidationreactor;shortcutdenitrification;nitriteaccumulation39294: