超高效螺旋式厌氧生物反应器流态研究陈小光

30520105　　　　　　ActaScientiaeCircumstantiaeVol.30,No.5May,2010:(863)(2006AA06Z332);(No.200931892911742)SupportedbytheNationalHigh-TechResearchandDevelopmentProgramofChina(No.2006AA06Z332)andtheCollegeStudentsScienceandTechnologyInnovationandPopularizationProjectofZhejiangProvince(No.200931892911742):(1979—),,,E-mail:[e-mail];＊(),E-mail:[e-mail]:CHENXiaoguang(1979—),male,Ph.D.candidate,E-mail:[e-mail];＊Correspondingauthor,E-mail:[e-mail],.2010.[J].,30(5):941-946ChenXG,ZhengP.2010.Flowpatternsofasuper-high-ratespiralanaerobicbioreactor[J].ActaScientiaeCircumstantiae,30(5):941-946陈小光,郑平＊浙江大学环境与资源学院,杭州310029:2009-09-08　　　:2009-12-11　　　:2010-02-23:,,.:(D/uL0.2,N※∞);(D/uL≥0.2,N※1).27.99%,,6.98%,21.01%.(Vh)(L)(G):Vh=0.7603L+0.1627G-4.0620,.N≤3.01..:;;;:0253-2468(2010)05-941-06　　　:X703　　　:AFlowpatternsofasuper-high-ratespiralanaerobicbioreactorCHENXiaoguang,ZHENGPing＊DepartmentofEnvironmentalEngineering,ZhejiangUniversity,Hangzhou310029Received8September2009;　　　receivedinrevisedform11December2009;　　　accepted23February2010Abstract:Thesuper-high-ratespiralanaerobicbioreactorhasshowngreatpotentialfortreatinghighconcentrationwastewater.Tomakeclearthereactorflowpattern,tracertestswereperformedusingapulsestimulus-responsetechniqueundertheconditionsofcold-modeltests.Basedontheexperimentaldata,theflowpatternswereanalyzedbytheaxialdispersionmodelandthetank-in-seriesmodel.Theresultsshowedthatflowpatternsapproachedaplugflowreactor(PFR)(dispersionnumberD/uL0.2,seriesnumberN※∞)underlowloadingrateandacontinuousflowstirredtankreactor(CSTR)(D/uL≥0.2,N※1)undersuperhighloadingrate.Themeandeadspaceinthereactorwas27.99%,dividedintomeandeadspacecausedbybiomass(6.98%)andhydraulics(21.01%).Therelationshipamongthehydraulicdeadspace(Vh),thevolumetrichydraulicloadingrate(L)andthevolumetricbiogasproductionrate(G)wasfoundtobe:Vh=0.7603L+0.1627G-4.0620,andthehydraulicdeadspacewasinfluencedbythevolumetricbiogasproductionratemorethanthevolumetrichydraulicrate.Thesuitableflowpatternofthesuper-high-ratespiralanaerobicbioreactorwasequivalenttothenumberofsamevolumetanks-in-seriesN≤3.01,andsomecontrolmeasuresaresuggestedtooptimizethemasstransferandvolumetricefficiencyofthereactor.Keywords:super-high-rate;spiralanaerobicbioreactor;flowpatterns;deadspace1　(Introduction)(EGSB)(,2008)(IC)(Pereboometal.,1994)、,(,COD40kg·m-3·d-1).(SPAC)(,2008),,(,2008).,COD306kg·m-3·d-1,DOI:10.13671/j.hjkxxb.2010.05.017　　　　　　　　　　3015.3kg·m-3·d-1,COD240kg·m-3·d-1,131kg·m-3·d-1(,2008).,SPAC.,,.,,,,,.2　(Experimentalmaterialsandmethods)2.1　试验装置1.,,;,1.5L();.:、100mm、1000mm7850mL;280mm300mm;、1600mm、28000mL21500mL.11.1　(1.NaHCO3,2.0.5%,3.,4.,5.,6.,7.,8.,9.,10.)Fig.1　Sketchoftheexperimentalapparatus(1.tankforsaturatedNaHCO3,2.tankforH2SO4(0.5%),3.waterpump,4.airpump,5.reactor,6.innerspiral,7.three-phaseseparator,8.waterseal,9.wetgas-flowmeter,10.anaerobic)1　Table1　Thebasicphysicalparametersofgranularsludge/mm/(g·mL-1)/(mm·s-1)0.381.141.0518.12.2　试验过程(0.5%),CO2(NaHCO3+).,,,(G)0～192.27m3·m-3·d-1,IC.(HRT)L(1.85～21.82m3·m-3·d-1),,,,.3　(Theoreticalanalysis),(1)E(t)、tσ2t.E(t)=C(t)∫∞0C(t)dtt=∫∞0tE(t)dt∫∞0E(t)dtσ2t=∫∞0t2E(t)dt-(t)2(1),C(t)t(mg·L-1).　,,,:C(t)t=D2C(t)l2-uC(t)l(2),D(mm2·min-1),l(mm),u(mm·min-1).C＊=C/C0、θ=t/t、Z=l/L,、,,C0(mg·L-1),L(mm).(2)9425:(3).C＊(θ)θ=(D/uL)2C＊(θ)Z2-uC＊(θ)Z(3),D/uL,,.D/uL,tC(t),:tσ2t.(3),D/uL0.01,D/uL、t、σ2tσ2θ(4).σ2θ=2DuL-2DuL2(1-e-uL/D)(4),σ2θ=σ2t/t2.D/uL=0,(PFR);D/uL=∞,(CSTR).,.,:C(t)=C0(N-1)!tτ(N-1)e-t/τ(5),C0(mg·L-1),τ(min),N.σ2θ:σ2θ=∫∞0NNθN+1e-Nθ(N-1)!dθ-1=1N(6)N,N.(7)N.N=1σ2θ(7),0σ2θ1,σ2θ,N.N:N=1,N=∞.(8).Vd=(1-t/HRT)×100%(8)4　(Results)ABR9,(,2008),9,(98.0%).,t(9),,9C-Θ2.Θ=tHRT(9),Θ.2Levenspiel(1974),2HRT(1～8),2.SPAC(15.3m3·m-3·d-1、131m3·m-3·d-1),,,19,(1、2、6)、(3、7)、(4、8)(5、9)、、.2　Table2　TheresultsofthetracertestsHRT/minΘL/(m3·m-3·d-1)G/(m3·m-3·d-1)t/minσ2θD/uLNVdVhVb17800.771.8549.69629.70.3120.1933.2114.88%7.90%6.98%2980.6114.69089.30.2140.1224.678.79%1.81%6.98%3980.6614.6949.6980.40.4690.3502.1317.92%10.94%6.98%4980.4614.6999.8469.80.5240.4271.9128.79%21.81%6.98%5980.3114.69192.2753.90.670.7451.4944.95%37.97%6.98%6660.4521.82051.00.2230.1284.4820.66%13.68%6.98%7660.3821.8249.6946.20.3690.2422.7130.04%23.06%6.98%8660.3021.8299.8438.70.5490.4671.8237.83%30.85%6.98%9660.0321.82192.2734.30.7991.4001.2548.03%41.05%6.98%943　　　　　　　　　　302　C-ΘFig.2　ThecurveofC-Θ5　(Discussion)5.1　反应器返混程度,,,.,,,.,LG.,D/uL.Tomlinson(1979),D/uL≥0.2,(D/uL=∞,D/uL=0).,N(N=1,,;N=∞,,).(1),(1、2、6)(5、9)D/uL(0.193、0.122、0.128)(0.745、1.400),Tomlinson(1979),(0.2),;(≥0.2),,、D/uL0.350～0.467,.(1),(1、2、6)(5、9)N(3.21、4.67、4.48)(1.49、1.25),,(N※∞);,(N※1),、N1.82～2.71,.,(D/uL0.2,N※∞),;(D/uL≥0.2,N※1),;、(0.35≤D/uL≤0.467,1.82≤N≤2.71).5.2　反应器死区1,9C-Θ9445:(Θ1.0),SPAC.:(Vh)(Vb).,.,1.5L,21.5L,6.98%.,(8)8.79%～48.03%,27.99%,,1.81%～41.05%,21.01%.3,(Continuous-flowStirred-TankReactor,CSTR)(Torres,etal.,2000),(activatedsludgeplants)(Burrows,etal.,2000),(AnaerobicBaffledReactor,ABR)(Grobicketal.,1979).,ABRHRT.3　Table3　Comparisonofthehydraulicdeadspaceindifferen