RMCH型净化槽生物硝化反应中N省略2N积累原因的理论分析及探讨梁祝

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:1007—5570(2002)03-0060-05RMCHNO2-N梁 祝(贵州师范大学资源与环境科学系,贵阳贵州 550001):RMCHNO2-N,。,NO2-N;DO;C/NNO2-N;NO2-N。。:NO2-N积累;硝化作用;生物脱氮:X505  :AAnalysisandstudyonnitriteaccumulationinRMCHJohkasouLIANGZhu(DepartmentofEnvironmentandResourceScience,GuizhouNormalUnversily,Guiyang,Guizhou,550002,China)Abstract:ThereasonsfornitriteaccumulationinRMCHJohkasouandeffectsonnitriteaccumulationareanalyzed.Theresultsshowthathighconcentrationofammonia-Nisanimportantfactorbringingaboutni-triteaccumulation,anddeficientDOisanotherimportantfactor.TheC/Nratioofinfluentisrelevanttoni-triteaccumulation.WhereC/Nratioisminimum,thereismaximumnitriteaccumulation.HRTandvolu-metricloadingofammonia-Nareresponsiblefornitriteaccumulation.Possibilityonanaerobicoxidationofammoniainanaerobictankisrepresented.Keywords:nitriteaccumulation;nitrifying;nitrogenremoval1 目前NO2-N积累的研究现状和影响因素  ,,。(nitrosomonas)。(Nitrobacter)。NH4-NNO2-N36,32。NH4-NNO2-N(242.8~351.7kJ/mol),NO2-NNO3-N(64.5~87.5kJ/mol)4~5。,,NO2-NNH4-N4~5,60:2002-03-20:、 20320028       ()JournalofGuizhouNormalUniversity(NaturalSciences)        Vol.20.No.3Aug2002,。1975VoetHNO2,,[1,2]。HNO2HNO2,[NO2-N/(NO2-N+NO3-N)50%][1]。HNO2、pH、、DO、[1]。(1)DO,,,。DO0.5mg/L。DONH4-N,,HNO2。(2)pH(NH3)(NH+4),(FA),FA,0.6mg/LFA,HNO2,HNO2,FA5mg/L。,HNO2,,HNO2。(3),,(QC),“”,,HNO2。(4)4~45℃,20~35℃,15℃,12~14℃,HNO2,15~30℃,,30℃,HNO2。(5)pH,pH,pH7,pH8,HNO2,,HNO2。(6)、,,,,HNO2。2 小规模净化槽中HNO2积累的形成过程分析2.1 1   4,1、2、()。2.2 312,HNO2,,1NO2-N。323626,,NO2-NNO3-N,,NH4-N,NH4-N3.5%。NH4-N,323,625NO2-NNO3-N,,0~0.04mg/L,626NO2-NNO3-N〗0.02mg/L。629,NH4-N626,6%,NO2-NNO3-N。71761 3       :RMCHNO2-N      ,NH4-N77.39mg/L,NO2-NNO3-N;71793,NH4-N77.39mg/L9389.9mg/L,NO2-N,9335.84mg/L,NO3-N31.44mg/L,917,NH4-N80.44mg/L,93,NO2-N16.28mg/L,NO3-N10.73mg/L。924,NO3-NNO2-N,NO2-N。,NO3-NNO2-N,HNO2。1115,,,NO2-NNO3-N,1130,NH4-N110.56mg/L,NO2-N,NH4-N1115。HNO2160d。2。2 —1—NH4-N(ConcentrationofNH4-Nofinfluent)—2—NH4-N(ConcentrationofNH4-Nofoutlet)—3—NO2-N(ConcentrationofNO2-Nofoutlet)—4—NO3-N(ConcentrationofNO3-Nofoutlet)2.3 TN、NH4-NHNO2TNNH4-N,,,。NO2-N,NH4-NTN,93,HNO2,NO2-NNO3-N31.44mg/L,NH4-NTN,83.9%48.7%。,NO2-N,NH4-NTN。TN、NH4-NHNO23。3 TNTH4-N—1—TN%(RemovalRateofTN)—2—NH4-N%(RemovalRateofNH4-N)—3—NO2-NNO3-N(NO2-N-NO3-N)mg/l3 HNO2积累现象的形成原因的理论分析与讨论3.1 NH4-NNH4-N2。,NH4-N110.52~77.39mg/L(1029NH4-N19.96mg/L,),NH4-N(30~40mg/L)2~3,,NO2-NNO3-N。NH4-N,9389.9mg/L91780.44mg/L,NO2-N。2,323626,NO2-NNO3-N,。629NH4-N626,NO2-N。NO2-NNO3-N0.28mg/L。717NH4-N629(87.8mg/l77.39mg/L),NO2-NNO3-N,0.28mg/l0.027mg/L。71793,NH4-N,NO2-NNO3-N0.027mg/L31.44mg/L。,,,,,,,91762                  ()               20 ,。,,NO2-N。NH4-NNO2-N。3.2 DO。NO2-N7,7,Q=6L/min,200%,,Q=3L/min,100%。,7,71.5,DO2/3,DO,7NO2-N。,NH4-N,2~3,NH4-N30~40mg/L,,,NH4-NDO,。μN:μN=μNmax·DO/(KO+DO):KO———DO。DO,。Laanbroek[1],HNO2DO,,0.2~0.4mg/L,1.2~1.5mg/L。DO,,,DO。4 C/N3.3 C/NCODcr/NH4-N4、23。,NO2-NNO3-N(626),C/N4.40~3.18,629C/N2.26,NO2-N,NO2-NNO3-N0.28mg/L。71793(815C/N=2.60)C/N,93C/N=1.15,NO2-N(35.84mg/L),,C/N,NO2-N,924,NO3-NNO2-N,NO2-N。1015,C/N1.951.66,NO2-N,NO3-N。1029,C/N7.05,NO2-N。1115,C/N1.72,,NO2-NNO3-N,,1.14mg/L。1130,C/N=2.81,NO2-NNO3-N1.86mg/L,11151.11mg/L。NO2-NC/N,C/N,C/N,NO2-N,NO2-NNO3-N(8.15),C/N,,,,HNO2。3.4 36,Q1=3L/min,7,Q2=6L/min,200%。:7HRT1=5.6hr;7HRT2=3.8hr。1/3,HNO2。3.5 HNO27,72/3,7NH+4-N:0.39kgNH+4-N/m3·d,793NH+4-N:0.54kgNH+4-N/m3·d。,1.4,。4 NO2-N积累对生物脱氮反应的影响和意义  ,63 3       :RMCHNO2-N      NH+4-N,,(),,NH+4-NNO3-N,(),,,NO2-NNO3-N,NH+4※HNO2※N2。(),:(1),25%,;(2)40%,C/NTN;(3)50%;(4);(5),。,HNO2,HNO2。,1NO2-NNO3-N,12,NO2-NNO3-N,NH4-N,NH4-NNO2-N、NO3-N。NH4-N,NH4-N[3],,NH4-N,:5NH+4+3NO-3※4N2+9H2O+2H+NH+4+NO2※N2+2H+,,,(NO3-N、NO2-N)。,12,12,NH4-NN2,CH4。,,,NO2-NNO3-N,TN。5 结论,HNO2,HNO2,。5.1 NH4-N,HNO2。,NH4-N,HNO2,160,。,160,NO3-N,,。5.2 ,,DO,,NH4-N,DO,,,HNO2。5.3 ,C/NHNO2,C/N,HNO2。5.4 HRTHNO2。HRT,HNO2。5.5 ,HNO2。(1)1120,,。(2)1120,。:[1]袁林江,等.短硝化———反硝化生物脱氮[J].中国给水排水,2000,16(2):29-31.[2]文一波,钱易.焦化废水生物脱氮研究[J].环境科学,1994,13(3):45-50.[3]王建龙.氨的厌氧氧化[J].生命的化学,1997,17(6):37-38.64                  ()               20 

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