MBR中DO对同步硝化反硝化的影响邹联沛

MBRDO邹联沛,　张立秋,　王宝贞,　王　琳(哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090)　　　:　膜生物反应器(MBR)中,在DO为1mg/L左右,MLSS为8000～9000mg/L,温度为24℃,进水pH值为7.2,COD、NH3-N分别为523～700mg/L和17.24～24mg/L的相对稳定条件下,对COD、NH3-N、TN的去除率分别为96%、95%、92%。详细分析了在控制DO的条件下,MBR发生同步硝化、反硝化的原因,并提出了在单级好氧反应器中控制DO可发生短程硝化—反硝化生物脱氮的机制。　　:　膜生物反应器;　同步硝化反硝化;　短程硝化—反硝化生物脱氮:X703　　:A　　:1000-4602(2001)06-0010-05EffectofDOonSimultaneousNitrificationandDenitrificationinMBRZOULian-pei,　ZHANGLi-qiu,　WANGBao-zhen,　WANGLin(SchoolofMunicipal&EnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China)　　Abstract:　Inthemembranebioreactor,undertherelativestableconditionsofDO1mg/L,MLSS8000～9000mg/L,temperature24℃,influentpH7.2,COD523～700mg/LandNH4+17.24～24mg/L,96%,95%,and92%areachievedrespectivelyfortheremovalofCOD,NH4+,andTN.Thereasonofsimul-taneousnitrificationanddenitrificationoccurringinMBRundercontrolledDOisdescribedindetails.ThemechanismthatshortcutnitrificationanddenitrificationmayoccurundercontrolledDOinasingle-stageaer-obicreactorisalsopresented.　　Keywords:　membranebioreactor;　simultaneousnitrificationanddenitrification;　shortcutnitrifica-tion/denitrification　　:“”(96-909-01-02-04)　　,,,DO、,,,DO,,。1　试验装置及方法1。1　1,8,,0.05μm,0.35m,·10·　　　2001Vol.17　　　　　　　　　　CHINAWATER&WASTEWATER　　　　　　　　　　No.61.5m2,24℃,,5.4L。,、、、、、,COD523～700mg/L,NH3-N17.24～24mg/L,TP2.47～5.1mg/L。2　DO对MBR处理效果的影响2.1　DO6mg/LDO,MBR1(MLSS8000mg/L～9000mg/L,)。1　DO6mg/LMBR(d)123456789DO(mg/L)6.166.25.65.76.36.15.95.8COD(mg/L)661.34671.92650543523563542539534COD(mg/L)31.8719.31232731343014.215.9COD(mg/L)19.9211.591416151917.213.210.6(%)96.9998.2897.8597.0597.1396.6396.8397.5598.02NH3-N(mg/L)18.71921.519.320.12319.862120.2NH3-N(mg/L)000.300.20.600.20NH3-N(mg/L)00000.20.500.090(%)1001001001009997.8310099.57100NO-2(mg/L)1.21.031.680.320.860.920.680.560.8NO-2(mg/L)1.560.821.10.60.30.390.310.30.45NO-3(mg/L)6.35.17.26.36.535.235.66.45.1NO-3(mg/L)5.04.76.34.55.84.455.15.624.68TN(mg/L)20.8212219.8212419.521.921.4TN(mg/L)98.7111189.27.98.26.7TN(mg/L)8.47.91076.77.77.17.36(%)59.6262.3854.5564.6568.167.9263.5966.6771.962.2　DO3mg/LDO3mg/LMBR2。2　DO3mg/LMBR(d)12345678910DO(mg/L)3.232.83.12.932.963.22.943.1COD(mg/L)661632621645634583596593623.6619.3COD(mg/L)27.893423212926.33129.63530.2COD(mg/L)19.922016142118.220.318.62319.5(%)96.9996.8497.4297.8396.6996.8896.5996.8696.3196.85NH3-N(mg/L)171818.6242321.120.6212219.2NH3-N(mg/L)100.51.20.70.20.100.10.05NH3-N(mg/L)0.5000.40.300.0600.030(%)97.0610010098.3398.710099.7110099.86100NO-2(mg/L)0.030.060.370.670.360.0560.520.0641.020.94NO-2(mg/L)0.090.020.310.630.20.090.310.070.630.62NO-3(mg/L)2.362.163.025.664.691.982.141.633.673.96NO-3(mg/L)2.11.352.214.583.221.561.691.253.123.35TN(mg/L)1818.519.72524.320.221.619.521.320.6TN(mg/L)656.71194.55.34.288.3TN(mg/L)5.24586.73.242.366.97.05(%)71.1178.3874.626872.4384.2685.4487.967.6165.78·11·2001Vol.17　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　No.6　　MBRDO3mg/L,CODNH3-N,TN,。F/M、C/N、pH、,DO。DO3mg/L,,NO-2NO-3DO6mg/L,,DO,,,。2.3　DO1mg/LDO1mg/LMBR3。3　DO1mg/LMBR(d)1234567891011DO(mg/L)1.21.031.111.21.51.230.861.11.050.97COD(mg/L)661.3636561.2498.1518.8636671.9700642635.2598COD(mg/L)35.866086.9422.6431.745069.5189.8449.67456.8COD(mg/L)15.943027.6618.8719.843011.5915.6320.321.623.5(%)97.5995.2895.0796.2196.1895.2898.2897.7796.8496.696.07NH3-N(mg/L)19.5520.9723.82218.920.9718.1320.682120.922NH3-N(mg/L)01.71.421.61.71.131.981.982.31.62.4NH3-N(mg/L)00.850.850.90.51.131.080.851.71.031.14(%)10095.9596.4395.9197.3694.6194.0495.8991.9195.0794.82NO-2(mg/L)0.370.0150.0150.0060.0040.0080.340.0540.0020.0380.03NO-2(mg/L)0.0370.0060000.0120.0680.036000.006NO-3(mg/L)0.06500.0480.0560.04700.450.042000.008NO-3(mg/L)0.04800.0480.0340.0600.390.040000TN(mg/L)2220.132422.819.421.619.622.120.622.324.32TN(mg/L)1.312.223.433.22.54.23.12.242.932.91TN(mg/L)0.90.332.11.621.3332.20.851.281.54(%)95.9198.3691.2592.9889.6993.8484.6990.0595.8794.2693.67　　3,DO1mg/L,COD,COD91%,,COD97%。,COD,。DO1mg/L,NH3-N95%,NH3-N,TN,92%。,NO-2NO-3,。TN,F/M、C/N、pH、MLSS、,DO。DO1mg/L,,,。2.4　DO0.5mg/LDO0.5mg/LMBR4。4　DO0.5mg/LMBR(d)123456DO(mg/L)0.50.470.40.630.510.72COD(mg/L)623652631659.75650659.75COD(mg/L)12314516832.1213580.06COD(mg/L)45798622.8254.614.52(%)92.7887.8886.3796.5491.697.8NH3-N(mg/L)24232218.1319.218.4NH3-N(mg/L)1213121.987.45.1NH3-N(mg/L)87.891.596.22.83(%)66.6766.0959.0991.2367.7184.62NO-2(mg/L)0000.08500.023NO-2(mg/L)000000NO-3(mg/L)0000.06500.11NO-3(mg/L)000000TN(mg/L)24.925.223.219.418.619.6TN(mg/L)1514134.312.37TN(mg/L)108.9112.59.874.5(%)59.8464.6852.5987.1146.9477.04　　4,DO0.5mg/L·12·2001Vol.17　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　No.6,MBRCOD、NH3-N、TN,,,;DO0.5mg/L,COD,。COD,,。3　同步硝化反硝化的机理探讨2。2　2,,,DO,。,,:,,。,。,NO-2,,NO-2,。,NO-2,。DO,,[1],,NH3-NNO-2242.8～351.7kJ/mol,5%～14%;NO-2NO-364.5～87.5kJ/mol,5%～10%,1/4～1/5,(NO-2NH3-N4～5),NO-2,DO3mg/L。DO6mg/L,65%,,DO,,,。:(),。,。,、,,。、,、,[2]。,:(、)、、[2]。,DO6mg/L,DO,,,;DO,,,,。DO3mg/L,,,,,75%。DO1mg/L,,,。DO,??,DO1mg/L,COD,COD,60mg/L,,COD30mg/L。DO1mg/L,,NH3-N1.6mg/L,NH3-N1mg/L,2·13·2001Vol.17　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　No.6mg/L,92%。,DONO-2NO-3[1]。Hanaki,DO,,,。Laanbroek[3],DO。0.2～0.4mg/L,1.2