EGSB反应器水力流态研究郭素红

EGSB＊郭素红1,2　倪　文1　邢　奕1　邹安华1　方　皓2(1.,100083;2.,100037)　用高效厌氧反应器(EGSB)处理高浓度有机废水,CODCr最高容积负荷达46kg(m3·d),CODCr去除率在90%以上。采用脉冲示踪法,以LiCl作示踪剂,对反应器的膨胀特性、水力流态规律进行研究。结果表明,水力负荷是影响膨胀特性的主要因素,EGSB的适宜膨胀率应保持在15%～19%。　EGSB　膨胀特性　水力流态　　　　　　　　＊“863”(2002AA601190)0　EGSB,(),。,、,[1-2]。EGSB,。1　1.1　试验装置1,,60mm×2005mm,4.41L,8L。1—;2—;3—;4—;5—;6—;7—;8—;9—;10—;11—。1　1.2　试验条件(30±2)℃,、、,CODCr:ρN∶ρP=200∶5∶1。NaHCO3pH6.5～7.2。UASB,VSS49.5gL。14.85gL。。LiCl[3],。2　248d,、,,CODCr46kg(m3·d),CODCr90%。2.1　床层膨胀特性研究2、CODCr。CODCr,,,,,。2　17　　　200712256DOI:10.13205/j.hjgc.2007.06.030　　EGSB,2.6mh,,0.15～0.23mh,9%～13%,,45,17%。,。56,4.16mh,,27%,,23%,6%,。,,、,4.29mh2.77mh,,。CODCr20kg(m3·d),,,,1.82mh,16%,。1.35mh,13%,,。,15%～19%,,。2.2　水力混合特性研究EGSB,,。　　1。,(2),C(C=CtC0,C0),θ(θ=tt,t)。,,,,E(t)、t、σ2t,:E(t)=Ct∫∞0Ctdt(1)t=∑n-1i=1(ti+1+ti)(Ci+1+Ci)(ti+1-ti)2∑n-1i=1(Ci+1+Ci)(ti+1-ti)(2)σ2t=∑n-1i=1(ti+ti+1)2(Ci+Ci+1)(ti+1-ti)4∑ni=1(Ci+Ci+1)(ti+1-ti)-tz(3)　　=(1-ttHRT)×100%(4)　E(t)———;t———;σ2t———;C———。1　(mL·min-1)(mL·min-1)(m·h-1)CODCr(kg·m-3·d-1)CODCr%(m·h-1)HRThcm%thσ2θDuLPeN%18.5182.54.2713.3292.10.5327.20715632.15.7340.3940.2663.7532.53620.4225.7581.7823.13951.5245.18811315.34.2100.3900.2623.8162.56518.8324.8722.0531.2493.21.9315.37615216.94.2400.4330.3083.2452.30521.1425.7581.7846.26972.5475.46414315.23.8510.4670.3472.8742.13929.551)25.02305.410005.333004.3320.3900.2633.8092.56218.8　　1);DuL;Pe;N。　　1,20%,CODCr46kg(m3·d),,,。40gL,。,。,,,DuL。18　　　200712256,DuL=0,;,DuL=∞,。DuLE(t)[4]。1(1～4)DuL0.266～0.347,EGSB。24,1.78mh,1.524mh2.547mh,0.2620.347,32.4%。,5.4mh,DuL0.263,CODCr23.13kg(m3·d)DuL,DuL。2.3　反应器运行过程中基质沿程分布研究。,2,4,。2　CODCr(kg·m-3·d-1)(m·h-1)%CODCr%122.83.873486.3223.01.781593.8330.22.071794.63　　　　12,,,1,2。,　　,1126cmCODCr,,2,。1,2,,,CODCr。3,20cm,CODCr,,CODCr94.6%。,,,。3　(1)EGSB,。,,15%～19%EGSB。CODCr46kg(m3·d),CODCr90%。(2)EGSB,,。(3),,。[1]　LettingaG,FieldJ.Advancedanaerobicwastewatertreatmentinthenearfuture.Wat.Sci.Tech.,1997,35(10):5-12.[2]　..:,1999.[3]　HeertjesPM,vanderMeerRR.Dynamicsofliquidflowinanupflowreactorusedforanaerobictreatmentofwastewater.BiotechnolBioeng,1978,20:1577-1594.[4]　,.().:,2000.　　100038　12　　(010)62320300E-mail　[e-mail]2007-01-2619　　　200712256NOVELCIRCULATINGFLUIDIZEDBEDBIOREACTORFORNITROGENREMOVALUNDERDIFFERENTNITRIFIEDLIQUIDRECIRCULATIONRATESCuiYubo　LiuHongbo　BaiChunxue(7)…………………………………………………………………………………………………………………………………………Abstract　Anewbiologicalnitrogenremovalprocess———Thecirculatingfluidizedbedbioreactor(CFBBR)isdevelopedforsimultaneousremovalofnitrogenandorganicmatter.Thissystemiscomposedofanaerobicbed,aerobicbedandconnectingdevice.Influentandnitrifiedliquidfromaerobicbedenteranaerobicbedfromthebottomoftheanaerobicbed,completingtheremovalofnitrogenandorganicmatter.Thesystemperformanceundertheconditionsofdifferentinflowloadingsandnitrifiedliquidrecirculationratesrangingfrom200%to600%wasexamined.Fromtechnicalandeconomicpointofview,theoptimumnitrifiedliquidrecyclerateis400%.Withashortesttotalretentiontimeof2.5h(0.8hintheanaerobicbedand1.7hintheaerobicbed)andanitrifiedliquidrecirculationrateof400%basedontheinfluentflowrate,theaverageremovalefficienciesandeffluentconcentrationsoftotalnitrogenandsolubleCODCrarefoundtobe88%,95%and3.5mgL,16mgL,respectively.TheVSSconcentration,nitrificationrateanddenitrificationrateinthesystemarelessthan1gL,0.026-0.1g(g·d)and0.016～0.074g(g·d)respectively.Keywords　circulatingfluidizedbedbioreactor,nitrification,denitrificationandrecirculationrateRESEARCHONDESIGNOFMULTISTAGEAOSTEPFEEDBIOLOGICALNITROGENREMOVALPROCESSGaoJunfa　WangLi　GuanJiangetal(11)…………………………………………………Abstract　Thispaperreviewstheprincipleandcharacteristicsofstep-feedmultistageAObiologicalnitrogenremovalprocess,meanwhile,consultedwiththecurrentstatusofresearchinabroadandtheprojectapplicationexamples,someimportantfactorsregardingtheoperationanddesignoftheprocessarediscussed.Thestep-feedmultistageAObiologicalnitrogenremovalprocessdoesnotapplyinternalmixedliquidreturn,themorereactors,thehighernitrogenremovalrate,butthedesignandoperationoftheprocesswillbecomplexaswell.Thequantitiesofreactorinprojectapplicationareusually2～4.Thevolumeratiooftheanoxicsectiontotheoxicsectionis1∶1.5.Asforthree-step-feedmultistageAObiologicalnitrogenremovalprocess,whenthenitrogenremovalattherateof78%,sludgereturnonlyattherateof50%.Keywords　step-feed,multistageAOprocessandbiologicalnitrogenremovalTREATMENTOFFLUOBENZENEWASTEWATERBYPHYSICOCHEMICALMETHODSLiGuoping　QiuYang　XiaMingfangetal(14)………………………………………………………………………………………Abstract　Itwasstudiedthattheprocessconditionsoftreatingfluobenzenewastewaterwithacidification,extraction,inorganicfluorideremovalandelectrocatalysis.Atthesuitableconditions,theremovalratesofCODCr,phenol,F-andpetroleumareover99.2%,99.99%,99.9%,99.5%,theeffluentindexessuchasCODCr,phenol,F-,petroleumandTOCwerelowerthanthelimitingvalueofprimarystandardofthe“IntegratedWastewaterDischargeStandard”(GB8978-1996).Atthesametime,phenolinthewastewatercanberecoveredandreused.Keywords　fluobenzene,extraction,activatedcarbonparticleswarm,electrocatalysis,wastewaterandresourcedisposalSTUDYONHY