1,2,2,2,2,2(1.,200092;2.,215011):SBR。pHC/N(32.5)。pH5.8。C/N3,45%。C/N2.537%,,COD,。C/N2.5,、,60.02、36.27、10.376mg·N/(L·h)。40mg·N/L,,47.5%。:;;SBR:X703.1:A:1672-0679(2011)04-0001-0310000,40t,10%。,,,。,。,,,。[1],,,。:NO3-→NO2-→NO→N2O→N2,()。,,,;,C/N3.75,[2]。,C/N2.4~3.2,25%[3]。C/N。NO2-C/N,,。11.13.2LSBR。1/2,T=3h:15min,45min,90min,15min,15min。30℃,52r/min。1.2C/N2.5∶1,60、50、40、30、20mg/L,。50mL18,3400mg·MLSS/L。5min,50mL50mL,,32℃。244()Vol.24No.4201112JournalofSuzhouUniversityofScienceandTechnology(EngineeringandTechnology)Dec.2011———————————————————[]2011-10-25[](51008202);(201104)[](1977-),,,。2011()1.3。:;220mg/L,82mg/L,0.5mg/L,300mg/L,[3]1.25ml/L。pH5.5~6。1.4NH4+-N;NO2--NN-(1-)-;NO3--N;COD;pH。22.1。0~7,。8,C/N。0~7,105mg·COD/L30mg·NO3--N/L,C/N3.5,pH7。3,,NO2--N,,NO3--NN2。Thomsen[4]pH。pH=5,,,;pH=8.5,,。C/N,pH7,。pH,,;pH7~8,[5]。,8,pH5.8。,NO3--N60mg/L,COD180mg/L,C/N3。,,,27.2mg·NO2--N/L(1),45%,COD95mg/L(2)。pH。46,COD150mg/L,C/N2.5,。,COD。,,24%。,,37%,NO2--N22.4mg·NO2--N/L,COD52mg/L。,NO3--N60mg/L,C/N2.537%,C/N38%,COD95mg/L52mg/L(2),,,。2.2C/N2.5,3C/N2.5。45min,45min。,4.575、11.05、19.1、23.45、27.5mg·NO2--N/L。150min,。4,,。、,60.02、36.27、10.376mg·N/(L·h)。40mg·N/L,,47.5%,COD65mg/L。2C/N1/mg·L-1/dpH/%COD/mg·L-1/d243C/N2.5,4C/N2.5、(:CODCOD)/min/min/mg·N·L-1/mg·N·L-1/mg·N·L-1/mg·N·L-1·h-1/%3(1)C/N。C/N3,45%。C/N2.537%,,COD,。(2)pH5.8。(3)C/N2.5,、,60.02、36.27、10.376mg·N/(L·h)。40mg·N/L,,47.5%。:[1]VandeGraafAA,RobertsonLA,JettenMSM,etal.MetabolicpathwayofanaerobicammoniumoxidationonthebasisofN-15studiesinafluidizedbedreator[J].Microbiology,1997,143(7):2415-2421.[2]SunH,YangQ,PengY.NitriteaccumulationduringthedenitrificationprocessinSBRforthetreatmentofpre-treatedlandfillleachate[J].BiotechnologyandBioenginnering,2009,17(6):1027-1031.[3],,,.C/N[J].,2010,61(11):2938-2943.[4]ThomsenJK,GeestT,RaymondPC.MassspectrometricstudiesoftheeffectofpHontheaccumulationofintermediatesindenitrificationbyparacoccusdenitrificans[J].AppliedandEnvironmentalMicrobiology,1994,60(2):536-541.[5],,,.pHMLSSNO2-[J].,2010,26(13):25-27.NitriteAccumulationduringtheDenitrificationProcessYUANYi1,2,HUANGYong2,SHENGXue-min2,PANYang2,LIXiang2(1.SchoolofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China;2.SchoolofEnvironmentalScienceandEngineering,SUST,Suzhou215011,China)Abstract:Thenitriteaccumulationinthedenitrificationprocessisinvestigatedwithasequencingbatchreactor(SBR),andnitriteaccumulatesobviouslyatdifferentC/Nratios(3and2.5)andlowpH.AndpH5.8isadvan-tageoustothenitriteaccumulationduringthedenification.Themaxnitriteaccumulationratiois45%whenC/Nratiois3.Althoughaloweraccumulationratio(37%)isobtainedat2.5ofC/Nratio,costsofmedicamentandsuccedentdisposalcanbeeconomizedandtheCODconcentrationineffluencewillbelower.AtC/Nratio2.5,therateofnitratereduction,nitriteaccumulationandnitritereductionincreaseswiththeriseoftheinitialnitrateconcentration,reachingthemaximumof60.02、36.27、10.376mg·N/(L·h),respectively.Thenitriteaccumulationratiopresentsnosignificantchange(about47.5%)whentheinitialnitrateconcentrationisabove40mg·N/L.Keywords:half-denitrification;nitriteaccumulation;sequencingbatchreactor(:):3