短程硝化反应器过程动力学特性研究郑平

浙江大学学报()　32(1):14～20,2006JournalofZhejiangUniversity(Agric.&LifeSci.):1008-9209(2006)01-0014-07　　:2005-05-10:(30070017);(2003C13005):(1962—),,,,,Tel:[phone];E-mail:pzheng@zjueducn郑平,金仁村,卢刚(,310029)　:采用脉冲刺激响应技术对内循环颗粒污泥床短程硝化反应器进行了示踪试验,结果表明反应器循环区的串联级数N为1.02,流态接近全混流反应器(CSTR),反应器沉淀区的分散数D牤uL为0.00148,流态接近平推流反应器(PFR),整个反应器的流动模型可以表示为全混流反应器和平推流反应器的串联组合对内循环颗粒污泥床短程硝化反应器曝气过程中的氨逃逸进行了分析,建立了氨逃逸的动力学模型,测得稳态运行时氨逃逸系数KNH3为0.692Lꆤh-1通过物料平衡,建立了内循环颗粒污泥床短程硝化反应器的过程动力学模型,测得稳态运行时的模型参数:氨氮最大比去除速率νmax=8.13mgNH4+-Nꆤ(gMLSS)-1ꆤh-1、饱和常数KS=1.73mgNH4+-NꆤL-1,动力学模型的计算值与试验值吻合良好,两者的平均相对误差为12.8%　　:内循环颗粒污泥床短程硝化反应器;流动模型;氨逃逸;动力学模型:X703.1　　　:AZHENGPing,JINRen-cun,LUGang(DepartmentofEnvironmentalEngineering,ZhejiangUniversity,Hangzhou310029,China)Kineticscharacteristicsofshortcutnitrifyingreactor.JournalofZhejiangUniversity(Agric.&LifeSci.),2006,32(1):14-20Abstract:Thetracertestswereperformedapplyingpulsestimulus-responsetechniquetoaninternal-loopgranularsludgebedshortcutnitrifyingreactor.TheseriesnumberN1.02inthecirculatingsectionindicatedthattheflowpatternwassimilartothatofcontinuouslystirredtankreactor(CSTR),andthedispersionnumberDuL0.00148inthesettlingsectionindicatedthattheflowpatternwassimilartothatofplugflowreactor(PFR).AmodelofCSTRandPFRinserieswasconstructedasflowmodelforthereactor.Theammoniaescapeduringaerationwasanalyzedanddescribedbyakineticmodel,wherethemodelparameterKNH3of0.692Lꆤh-1wasdeducedfromexperiment.Basedonmaterialbalance,akineticmodelforinternal-loopgranularsludgebedshortcutnitrifyingreactorwasconstructed,themodelparametersνmaxof8.13mgNH4+-Nꆤ(gMLSS)-1ꆤh-1andKSof1.73mgNH4+-NꆤL-1weredetermined.Predictionsinferredfromthemodelwereingoodagreementwiththeexperimentaldataobtainedfromactualoperation,therelativeerrorsbetweenthembeing12.8%.Keywords:internal-loopgranularsludgebedshortcutnitrifyingreactor;flowmodel;ammoniaescape;kineticsmodel,:　　,,、、1,,-、-2,3,,,,,,,,、、,,1　材料与方法1.1　,:pH7.02,VSS9.2gꆤL-1,SS16.9gꆤL-1,41.2　1,、、10.38L,1∶1,、153.9cm2、97.3cm2346.4cm2,0.2mm,,,,,,,　　1-;2-;3-;4-;5-;6-;7-;8-;9-1　Fig1　Thereactorsystemanditsflowsheet1.3　,,16d,540.12mgꆤL-1ꆤd-1,98%,4,30～32℃,pH8.0,1.4mgꆤL-1,,,30g,25d,,,1,,5.8gꆤL-1,0.65Lꆤmin-1,420mgꆤL-1,95%,NO2-NOx-94.5%,1.4　pHpHS-9V;;DOJPB-607;BSD-2;-;N-(1-)-;;,,,;,500rꆤmin-110min,,15　1浙江大学学报()2　试验结果2.1　10mL5gꆤL-1,,22　Fig2　Thechangeoftheconcentrationofeffluenttracerfromcirculatingsectionwithtime　　2,,10mL120mgL,,33　Fig3　Thechangeoftheconcentrationofeffluenttracerfromsettlingsectionwithtime　　3,2.2　(2,4-),22mgꆤL-1,27.5℃,pH8.0,44,(0.985),,0.91mgNH4+-Nꆤh-14　Fig4　Relationshipbetweenammountofescapingammoniaandtimeduringsteadystate3　讨　论3.1　,,,;,,,,(1)E(t)、–tσt25E(t)=C(t)∫∞0C(t)dt;　–t=∫∞0tE(t)dt∫∞0E(t)dt;1632　,:σt2=∫∞0t2E(t)dt-(–t)2(1),C(t),,,N,N,:N=1σθ2(2),σθ2:σθ2=σt2–t2N=1,(CSTR),N=∞,(PFR),:C*θ=(DuL)2C*Z2-uC*Z(3),D,l,uC*=CC0,θ=t–t、Z=lL,、,C0,LDuL,DuL=0,(PFR);DuL=∞,(CSTR),121　Table1　Theanalysisonflowpatternincirculatingsectionσt2min2–tminσθ2NV1L64059.5255.80.9791.027.382　Table2　Theanalysisonflowpatterninsettlingsectionσt2min2–tminσθ2DuLV2L19.85581.90.002960.001482.36　　:1,(CSTR);,(PFR),V1V27.38L2.36L,5.22%,0.75%,4.47%,(5)5　Fig5　Flowmodelofthereactor　　,Q;S0;S;X,,,3.2　,,6,7,5,7:vNH3=KNH31+exp(625090227315+T-→　　　←S2303pH+0335)(4),vNH3,S、TKNH3,、,KNH3,,,,0.91mgNH4+-Nꆤh-1,(4)KNH30.692Lꆤh-1,8.61%,17　1浙江大学学报()3.3　3.3.1　动力学模型的构建　　,Monod8～10:v=vmaxSKS+S(5),v;vmax;KS,:v=-1XꆤdSdt(6):=++　　　　QS0=QS-V1dSdt+vNH3(7)(5)、(6)(7),:Q(S0-S)-vNH3V1X=vmaxSKS+S(8)　　,vmaxKS3.3.2　模型参数的确定　　,(8),:V1XQ(S0-S)-vNH3=KSvmax1S+1vmax(9)33　Table3　PerformanceofthereactorundersteadyoperationQ(Lꆤh-1)S0(mgꆤL-1)S(mgꆤL-1)X((gMLSS)-1ꆤL-1)V1XQ(S0-S)-vNH3(Lꆤmg-1)1S(Lꆤmg-1)0.461488.63.785.770.1910.2650.461488.02.945.840.1930.3400.495586.912.35.850.1520.08110.495514.96.585.740.1690.1520.527633.816.25.750.1310.06160.527592.68.685.800.1390.1150.579439.24.065.750.1690.2460.579467.04.765.720.1580.2100.615582.424.85.820.1260.04040.615511.814.35.820.1410.0700　　3,(9),66　Fig6　Analysisforkineticparameters　　KSvmax=0213,1vmax=0.123,r0.923vmax=8.13mgNH4+-Nꆤ(gMLSS)-1ꆤh-1、KS=1.73mgNH4+-NꆤL-18,93.3.3　动力学模型的验证与应用　　,,490mgꆤL-1,Q,S,　　(7),,12.8%,1832　,:7　Fig7　Verificationofkineticmodel,,,①S0S;②HRTS898　Fig8　Resultsofsimulation:effectofinfluentammoniaoneffluentammoniainsteadyoperation　　8,350mgꆤL-1,;490mgꆤL-1,9,HRT20h,HRT;HRT16h,HRT,HRT9　HRTFig9　Resultsofsimulation:effectofHRToneffluentammoniainsteadyoperation4　结　论　　,,:4.1　(CSTR),(PFR)4.2　,,,KNH30.692Lꆤh-14.3　,vmax=8.13mgNH4+-Nꆤ(gMLSS)-1ꆤh-1、KS=1.73mgNH4+-NꆤL-1,,12.8%,,,References:1　VerstraeteW,PhilipsSNitrification-denitrificationprocessesandtechnologiesinnewcontextsJEnvironmentalPollution,1998,102(31):717-7262　ZHENGPing,FENGXiao-shan(,),19　1浙江大学学报()JettenMSM,etalStudyonperformanceofANAMMOXfluidizedbedreactorJActaScientiaeCircumstantiae(),1998,18(4):367-372(inChinese)3　VanKempenR,MulderJW,UijterlindeCA,etalOverview:fullscaleexperienceoftheSHARONprocessfortreatmentofrejectionwaterofdigestedsludgedewateringJWaterScienceandTechnology,2001,44(1):145-1524　LUGang,ZHENGPing(,)Researchoncontrolstrategyofinternal-loopairliftreactorforshortcutn