MBBR生物预处理工艺硝化过程动态模型的建立徐斌

38　520065　　　　　　　　　JOURNALOFHARBININSTITUTEOFTECHNOLOGY　Vol.38No.5May2006　　　　　　MBBR徐　斌,夏四清,胡晨燕,高乃云(,200092,E-mail:[e-mail])　:采用MBBR工艺对微污染黄埔江原水硝化过程动力学和反应器动力学进行了研究.采用考虑最小基质质量浓度的Michaelis-Menten方程,氨氮去除速率方程为N=1879(S-0.08)/(S+1.52),各动力学参数分别为:最大氨氮去除速率Nmax为1879mg/(m2d);半速率常数Ks为1.6mg/L;最小基质氨氮质量浓度为0.08mg/L;最大细胞比增长速率μmax为1.05d-1.试验表明,MBBR反应器为典型的完全混合反应器,结合硝化反应动力学,建立了完全混合式原水生物预处理硝化反应器动态模拟模型.通过模型计算与实际中试运行效果比较可以得出:在低进水氨氮质量浓度条件下,模型计算值与实验数据略有差别;在中高进水氨氮质量浓度条件下,模型计算值与实验结果较为一致.模型较好地反应了工艺硝化的过程,可方便地应用于工艺的控制和管理.:硝化;动态模拟;生物预处理;MBBR:X506:A:0367-6234(2006)05-0735-05Dynamicsmiulationmodelofnitrificationinbio-pretreatmentprocessusingMBBRtechnologyXUBin,XIASi-qing,HUChen-yan,GAONai-yun(StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China,E-mail:[e-mail])Abstract:Thenitrifyingandreactorkineticsofrawwaternitrificationinbiologicalpretreatmentofmicro-pol-lutedwaterfromHuangpuRiverbyMBBRtechnologywasstudied.AccordingtotheequationofMichaelis-Menten,takingtheminimumammonianitrogenconcentrationintoconsideration,therelationshipbetweenam-monianitrogenconcentrationsandammonianitrogenremovalratescouldbepresentedasN=1879(S-0.08)/(S+1.52).Fournitrificationkineticsparameterscouldbedirectlyorindirectlyobtainedbythemeas-urementsofthereactorsystem,includingtheminimumammonianitrogenconcentration,thehalfsaturationconstant,themaximumammoniaremovalrateandthemaximumspecificbacterialgrowthrate.Fortheexperi-mentalconditions,theparametersweredeterminedtobe0.08mg/L,1.6mg/L,1859mg/(m2d)and1.48d-1,respectively.ItcanbedrawnthattheMBBRbelongstotheCSTRandconsideringthenitrifyingki-neticsthenitrificationdynamicsimulationmodelofthistypeofreactorwasbuil.tThevalidityofthismodelwastestifiedbythepilot-scaleexperimentofHuangpuriverrawwaterbio-pretreatmentbyMBBRtechnology.Comparingthecalculationresultsofthemodelwiththeresultsofexperiment,theconclusioncouldbedrawn:thehighertheconcentrationofammonianitrogeninrawwateris,thelessthedifferencebetweenthemodelandtheexperimentis.Asamatteroffact,theresultsofthismodelareveryclosetotheexperiments;anditcanbeusedtomanageandcontrolthepracticaloperationofthistechnologyeffectively.Keywords:nitrification;dynamicsimulationmodel;biologicalpretreatment;MBBR:2004-08-22.:(2002AA601130);(2003BA808A17).:　(1976-),,,;(1965-),,,,;(1949-),,,,.　　,、;,,[1].,.,、.3mg/L,[2,3].,.(MBBR).、、、、,,.MBBR1,60～160m3/h.,.1　实验工艺与设备MBBR():××=6.0m×1.5m×9.5m(9.0m),;50%(,100mm,100m2/m3);48DN25(L=500mm),4.,.2　氨氮的降解规律MBBR,1.,,.1　/℃pH/NTUρ(DO)/(mgL-1)/(mgL-1)ρ(NH3-N)/(mgL-1)ρ(NO3--N)/(mgL-1)ρ(NO2--N)/(mgL-1)20.17.38355.26.081.352.940.1420.17.61369.85.920.353.850.05　　MBBR1L25%,45m3/h,80m3.、、、pHDO1、2.1　、2　DOpH　　1、2:,,..,,,,.,,1mg/L.pH,,,,,.pH,7mg/L.5～6mg/L,.3　原水生物预处理硝化反应动力学3.1　,.,,,.Ritt-manMcCartySmin=Ksb/(μmax-b),736　　　　　　　　　　　　　　　　　　　　　38　μmax=Yqm[4].Smin,mg/L;Ks,,mg/L;b,0.05d-1[3];Y(mg/mg);qm,,mg/(mgd);μmax,d-1..,0.1mg/L,;,,0.08mg/L,.,20℃,0.08±0.04mg/L.3.2　,VdSdt=Q(S0-Se)-NrA.,dSdt=0.Nr=Q(S0-Se)A.:V,m3;Q,m3/d;S0,mg/L;Se,mg/L;Nr,mg/(m2d);A,m2.,3;4.3　　　3、4:6mg/L,1500mg/(m2d),,,,,0.1mg/L,.4　　　,Michaelis-Menten[6]:N=NmaxS/(Ks+S).,Michaelis-Ment-enN=Nmax(S-Smin)/(Ks+S-Smin).Smin,0.08mg/L;,MATLABcurve-fit,N=1879(S-0.08)/(1.6+S-0.08).　　5.5,,0.998.Nmax=1879mg/(m2d),0.078g/(m2h),0.072g/(m2h)(6).()Ks1.6mg/L.,Ksb;μmax=1.05d-1.5　7375　,:MBBR6　3.3　[7,8],.SNH3-N0.27SO2,;SNH3-N0.27SO2,[7,8];MBBR,,,0.5mg/L,DO≮0.5/0.27=1.85mg/L,DO.3.0mg,2.0mg/L,DO7.4mg/L,DO.2mg/L,DO7mg/L,,,.4　动态模拟模型的建立,,,,,.4.1　.7.Q;A1A2;S0、S1S2、;V1V2.7　MBBR　　,QS0-N1×A1=QS1,QS1-N2×A2=QS2.iQSi-1-Ni×Ai=QSi.,,,,QS0-1879S1-0.08S1+1.52×A1=QS1,QS1-1879S2-0.08S2+1.52×A2=QS2.(1)S2.(1)S1=18×105Q[4×105QS0-46975A1-6.08×105Q-25(2.56×108Q2S20-6.0128×107QS0A1+7.7824×108QS0+3.530641×106A21+1.0101504×108QA1+5.914624×108Q2)1/2].　　,,,.4.2　25℃,pH.1、23:80m3/h,45m3/h,HRT1h,0.56.32.,(6),20℃.2　t/℃HRTρ()/(mgL-1)/%18027.2600.650.30050.50.650.18072.328026.3601.60.39076.51.60.32279.838024.9603.050.68077.63.050.70077.1412018.5402.290.80062.62.290.94059.0　　,,.0.5、1、1.5、2、2.5、3、3.54mg/L,HRT=60min,8;,20738　　　　　　　　　　　　　　　　　　　　　38　℃,HRT=40min,9.8　HRT=60min9　HRT=40min　　:,60min,,,,.40min,,.,.(、、、、、),MBBR.5　结　论1),Nmax1879mg/(m2d);Ks1.6mg/L;0.08mg/L;μmax1.05d-1.2)MBBR,0.5,.,,.3)60min,,,,.40min,,.,MBBR.参考文献:[1].[J].,2001,20(2):12-14.[2]LIUYu,CAPDEVILLEB.Kineticbehaviorsofnitrif-yingbiofilmgrowthinwastewaternitrificationprocess[J].EnvironmentalTechnology,1994,15(11):1001-1013.[3]KIMURAK,WATANABEY,OKABES,etal.Kineticanalysisofnitrifyingbiofilmgrowingontherotatingmem-branedisk[J].WaterSciTechnol,2001,43(4):111-118.[4]RITTMANBE,MCARTYPL.Modelofsteady-state-biofilmkinetcs[J].BiotechnolBioeng,1980(22):2343-23574.[5]RITTMANBE,MANEMJA.Developmentandexperi-mentalevaluationofasteady-state,multispeciesbiofilmmodel[J].BiotechnolBioeng,1992,39:914-922.[6]　,,.[M].:,2000.[7]　,,,.[J].,2003,19(4):15-18.[8]　,,,.[J].,2003,23(6):742-747.(　刘　彤)7395　,:MBBR