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戴航,黄卫红,钱晓良,陆晓华(华中理工大学环境科学与工程系,湖北武汉 430074) [],250～440℃20～24MPa,。、。TOC99%。 [];; []TQ085+.4 []A []1005-829X(2000)08-0023-03InvestigationonsupercriticalwateroxidationofpapermakingwastewaterDAIHang,HUANGWei-hong,QIANXiao-liang,LUXiao-hua(HuazhongUniversityofScienceandTechnology,Wuhan430074,China))Abstract:Supercriticalwateroxidationofpapermakingwastewaterisinvestigatedinabatchpressurereactorat250～440℃and20～24MPa.TheremovalrateofTOCofthewastewatercouldbemorethan99%.TheeffectsoftemperatureandoxidantconcentrationontheremovalrateofTOCofthewastewaterhavebeenstudied.Keywords:supercriticalwater;oxidation;papermakingwastewater 。,。,,。〔1〕、〔2,3〕,、,,,。 (SCWO)。(T374℃,P22.1MPa),;、、〔4,5〕。,。、。,、,〔6〕。。,。1 1.1 仪器和试剂 (Parr):500mL,600℃38MPa;:Apollo9000(Tekmar);,()。1.2 试验装置及步骤 1。图1 试验装置 、,。,,。,。Apollo9000TOC,TOCTALK。:1mL,680℃,O2,200mL/min,3。 ,。TOC(1000mg/L,Tekmar)。TOC10～750mg/L。 Y=(1.850E+05)X-13166—23—2000年8月第20卷第8期 IndustrialWaterTreatment Aug.,2000Vol.20No.8 R2=0.99132 2.1 实验结果 ,1。表1 造纸废水的水质指标pHCOD/mg·L-1TOC/mg·L-19～1052915135372 、(40mL),2。表2 不同条件下的试验数据/℃/MPa/%TOC/mg·L-1TOC/mg·L-1TOC/%2503.42.46603.5423.393.62755.52.46603.5301.195.43007.52.46603.5235.796.432010.62.46603.5170.897.434014.32.46603.593.298.538023.12.46603.559.499.141030.22.46603.526.499.644032.32.46603.513.299.838024.206603.52238.666.138024.30.986603.5528.792.038024.22.46603.5247.996.938024.44.96603.5118.998.22.2 温度对造纸废水氧化分解的影响 H2O22.4%,205mL,TOC2。,TOC。375℃、22MPa(),TOC99%。图2 温度对TOC去除率的影响2.3 氧化剂H2O2的浓度对造纸废水氧化的影响 380℃,24.2MPa,H2O2,TOC,3。H2O2,TOC。,,CO2H2O。图3 H2O2浓度对TOC去除率的影响2.4 系统压力与反应温度的关系 ,,,200、300、400mL,4。375℃,20MPa。,99%。图4 压力与温度的关系 ,,CO、CO2。。380℃、23.0MPa,H2O2TOC66.1%98.2%。,,,TOC2238.6mg/L,,。,,TOC。—24—试验研究 2000-08,20(8) ,,。,,。,,。 ,,,。,,。390℃,,。3 (1)。TOC。,TOC100%。 (2)。 (3)。,。[][1].[J].,1995,13(2):10～13.[2],.—[J].,1992,(4):19～23.[3],,.SBR[J].,1998,(2):20～21.[4]ModelM.ProcessingMethodsfortheOxidationofOrganicsinSupercriticalWater[P].US4543190,1985.[5]ShawRW,etal.SupercriticalWater-MediumforChemistry[J].ChemicalandEngineering,1991,23(12):26～38.[6]KruseAandSchmiederH.SupercriticalOxidationinWaterandCarbonDioxide[J].EnvironmentalProgress,1998,17(4):234～239.[](1975- ),,。[]2000-04-21(上接第3页),,,(GAC),,(),。[][1]RaymondMHozalski,etal.TOCRemovalinBiologicalFilters[J].J.AWWA,1995,(12):40～54.[2]JosephGJacangelo,etal.SelectedProcessesforRemovingNOM:AnOverview[J].J.AWWA,1995,(1):65～77.[3]StephenJRandtke.OrganicContaminantRemovalbyCoagulationandRelatedProcessCombinations[J].J.AWWA,1988,(5):41～56.[4]DouglasMOwen,etal.NOMCharacterizationandTreatability[J].J.AWWA,1995,(1):46～63.[5]KeithEDennett,etal.Coagulation:ItsEffectonOrganicMatter[J].J.AWWA,1996,(4):129～142.[6],.pH[J].,1994,(2):1～7.[7]EricMVrijenhoek,etal.RemovingParticlesandTHMPrecursorsbyEnhancedCoagulation[J].J.AWWA,1998,(4):139～150.[8]GilGrozes,etal.EnhancedCoagulation:ItsEffectonNOMRemovalandChemicalCosts[J].J.AWWA,1995,(1):78～89.[9]RobertCCheng,etal.EnhancedCoagulation:aPrelimminaryEvaluation[J].J.AWWA,1995,(2):91～103.[10]JohnCCrittenden,etal.RemovalofDissolvedOrganicCarbonUsingGranularActivatedCarbon[J].Wat.Res.,1993,27(4):715～721.[11]KirkONowack,etal.FerricChlorideplusGACforRemovingTOC[J].J.AWWA,1999,(2):65～77.[12]NAbuZeid,etal.ActivatedCarbonAdsorptioninOxidizingEnvironments[J].Wat.Res.,1995,29(2):653～660.[13]ChristineLWarta,etal.TheEffectofMolecularOxygenontheActivatedCarbonAdsorptionofNaturalOrganicMatterinOHIORiverWater[J].Wat.Res.,1995,29(2):551～562.[14],[J].,1997,(3):50～51.[15].,,1991,():15～17.[16],.[M].:,1992:84～113.[17]VeroniqueLT,etal.CoagulationPretreatmentforUltrafiltrationofaSurfaceWater[J].J.AWWA,1999,(12):76～81.[18]IsabelCEscobar,etal.InfluenceofNFonDistributionSystemBiostability[J].J.AWWA,1999,(6):76～89.[19]HBrattebo,etal.IonExchangefortheRemovalofHumicAcidsinWaterTreatment[J].J.Wat.Res.,1987,21(9):1045～1052.[20]PaulLKFu,etal.RemovingAquaticOrganicSubstancesbyAnionExchangeResins[J].J.AWWA,1990,(10):70～77.[21]PhilipHSKim,etal.UsingAnionExchangeResinstoRemoveTHMPrecursors[J].J.AWWA1991,(12):61～68.[22],.213201×7[J].,1998,(6):540～547.[](1964- ),1987,。[]2000-02-21—25— 2000-08,20(8) 超临界水氧化法处理造纸废水的初步研究