UASB法处理PTA污水的设计闵志坚

Chemistry&Bioengineering2005,No.447　　　:2005-01-13:闵志坚(1973-),男,湖北武汉人,高级工程师,研究生在读,研究方向:工业污水处理。UASBPTA(华中科技大学环境科学与工程系,湖北武汉430074)　　　:上流式厌氧污泥床(UASB)处理PTA污水可取得良好的效果,在工艺设计的过程中需要考虑到PTA污水在事故状态下的收集和污水的水质调节;UASB厌氧系统的设计要注意处理单元的合理划分、布水系统、三相分离器以及污泥培养四个方面的问题。:UASB;精对苯二甲酸;三相分离器;布水系统;颗粒污泥:X783　　　　　:A　　　　　:1672-5425(2005)04-0047-03　　(PTA),,PTA,,。——PTA,。1　PTA1.1　PTA[(TA)],TA,、、,,。PTA、1、2。1　PTATab.1　QualityandfluxofPTAwastewater/m3h-1COD/mgL-1pHPTA40068003～4CTA200150001～1422～1200002～4655--:CTA———2　PTATab.2　MaincomponentsofPTAwastewater%%%%Ca2+mgL-120～3030～4015～304～151500PTA18500m3d-1,3:3　Tab.3　WastewatertreatmentindexesCOD/mgL-1pH/℃SS/mgL-17500～83004～545～603006～9401501.2　PTA,PTA,40℃。,TA,,。2　PTA1、2。1　PTAFig.1　TheprocessofPTAwastewater2　PTAg.2　TheprocessofPTAwastewaterbiochemicaltreatment48　　　:UASBPTA/200543　3.1　3.1.1　,TACTA,、,。1,PTA。25m×20m×5m,;V=2300m3;10,φ1500mm,r=20rmin-1,N=0.75kW;2,Q=100m3h-1,P=0.1MPa,N=7.5kW。3.1.2　,。Q=700m3h-1,t1=65℃,t2≤40℃。3.2　UASBUASB:Q=18500m3d-1;COD=5400～6200mgL-1,pH3～4;COD=1560～1780mgL-1,pH6;5kgCODm-3d-1;20～30gL-1。3.2.1　UASBUASB,:V=Qci/Nv:V—,m3;Q—,m3d-1;ci—,mgL-1;Nv—,kgCODm-3d-1。UASBV=22200m3。,,[1]。5,L×B×H=75m×12m×6m;,5900m3,,、。3.2.2　,。,、、,、。,。(3),,,。,50m2,4m2。3　UASBFig.3　InfluentdistributionsystemofUASBreactor3.2.3　PAQUES,4。,、。4　Fig.4　Principleddiagramofthree-phaseseparatorL×B=5m×2m,,。,,;,。3.2.4　UASB,PTA。220t(80%),10gL-1,。,UASB[2]:(1)。:UASBPTA/2005449　　　2.0kgCODm-3d-1,30～50d,,,。(2)。2.0～5.0kgCODm-3d-1,0.2～0.3kgCOD/kgTSd,30～50d。(3)。5.0kgCODm-3d-1。,,,。3。,UASB,。4　(1)PTA,,。(2)UASB:,,;,,、、;,,“”“”,;,,,。:[1]　.UASB[M].:,2000:30-48.[2]　.[M].:,1998:123-141.DesignofUASBProcessTreatingPTAWastewaterMINZhi-jian(SchoolofEnvironmentalScienceandEngineering,HuazhongUniversityofScienceandTechnology,Wuhan430074,China)Abstract:UpflowanaerobicsludgeblanketgainsgoodeffectintreatingPTAwastewater,wedemandtoconsiderthecollectionofwastewaterundertheemergencyandadjustthequality.Ontheotherhand,thedesignofUASBsystemmustconsidertheseparationofUASBsystem、three-phaseseparator、influentdistributionsys-temandcultureofgranularsludge.Keywords:upflowanerobicsludgeblanket;puretare-phelicacid;three-phaseseparator;influentdistributionsystem;granularsludge(上接第39页)[5]　KokaljA.XCrySDen—anewprogramfordisplayingcrystallinestructuresandelectrondensities[J].JMolGraphicsModell,1999,17:176.ElectronicStructureandPropertiesofSeriesBatteryMaterialofLiFePO4MINXin-min,ZHANGWen-qin,XUDe-hua(StateKeyLaboratoryofAdvancedTechnologyforMaterialsSynthesisandProcessing,WuhanUniversityofTechnology,Wuhan430070,China)Abstract:LiMPO4(M=Mn,Fe,CoandNi)andFePO4arestudiedbydensityfunctionanddiscretevaria-tion(DFT-DVM)method.Thecorrelationamongcomposition,electronicstructure,chemicalbondandprop-ertyhavebeenstudied.ThestrengthsofionicandcovalentbondsmainlydecreaseinLiMPO4fromMntoNi,andthevariationsofdensityofstate(DOS)showthattheelectronicconductivityshouldbeincreasedfromMntoNi.TheionicandcovalentbondsofLiFePO4arebothweakerthanthoseofFePO4,andthevariationsofDOSalsoshowthattheelectronicconductivityofLiFePO4shouldbelargerthanthatofFePO4.M3dpartialDOSmainlycontributestothelowestconductionband(LCB),O2pmainlycontributestothehighestvalenceband(HVB)neartotheFermilevel,andotherpartialDOS'arefurtherawayfromtheFermilevel.Keywords:electronicstructure;conductivity;batterymaterial;LiFePO4