二级氧化工艺预处理对硝基苯甲酸废水的研究

丁春生1,2,缪佳2,秦树林3(1.昆明理工大学环境科学与工程学院,云南昆明650093;2.浙江工业大学建筑工程学院,浙江杭州310032;3.煤炭科学研究总院杭州环境保护研究所,浙江杭州311201):以对硝基苯甲酸废水为处理对象,分别考察了O3/GACClO2/GAC工艺以及二者的组合工艺对有机物的去除效率和改善废水可生化性的效果结果表明,O3/GAC工艺的最佳O3投量为400mg/L,ClO2/GAC工艺的最佳ClO2投量为300mg/L;单级氧化工艺处理出水的有机物浓度仍较高,不能满足后续生化处理对进水水质的要求;O3/GAC)ClO2/GAC组合工艺的处理效果优于ClO2/GAC)O3/GAC组合工艺,其对COD的去除率可达75%左右,并使BOD5/COD值由原水的0.10升高到0.46,提高了废水的可生化性,减轻了后续生化处理的负荷,是对硝基苯甲酸废水的有效预处理方法:(2003C33036):对硝基苯甲酸废水;臭氧;二氧化氯;活性炭;二级氧化:X703.1:C:1000-4602(2008)01-0073-04StudyonTreatmentofParanitrobenzoicAcidWastewaterbyTwo-stageOxidationProcessDINGChun-sheng1,2,MIAOJia2,QINShu-lin3(1.FacultyofEnvironmentalScienceandEngineering,KunmingUniversityofScienceandTechnology,Kunming650093,China;2.CollegeofArchitectureandCivilEngineering,Zhe-jiangUniversityofTechnology,Hangzhou310032,China;3.HangzhouInstituteforEnviron-mentProtection,ChinaCoalResearchInstitute,Hangzhou311201,China)Abstract:O3/GACandClO2/GACprocessesaswellastheircombinationprocesswereusedtopretreattheparanitrobenzoicacidwastewater,andtheorganicsremovalefficiencyandbiodegradabilityinone-stageandtwo-stageoxidationprocesseswereinvestigatedrespectively.Theresultsshowthattheopt-imaldosagesofO3andClO2are400mg/Land300mg/Lrespectively.Theeffluentorganicconcentrationfromone-stageoxidationprocessisstillhigher,whichcannotmeetthewaterqualitydemandofsubse-quentbiochemicaltreatmen.tPollutantsremovalefficiencyofO3/GAC-ClO2/GACprocessisbetterthanthatofClO2/GAC-O3/GAC,withtheCODremovalrateofabout75%andtheBOD5/CODratioincrea-sesfrom0.10to0.46.Thewastewaterbiodegradabilityisimprovedgreatly,andtheloadingofsubse-quentbiochemicaltreatmentisdecreased.Thetwo-stageoxidationprocessofO3/GAC-ClO2/GACisaneffectivepretreatmentmethodforparanitrobenzoicacidwastewater.Keywords:paranitrobenzoicacidwastewater;ozone;chlorinedioxide;activatedcarbon;two-stageoxidation#73#第24卷第1期2008年1月中国给水排水CHINAWATER&WASTEWATERVo.l24No.1Jan.2008,(2.07V),,[12],,[3~5],[67],[89],O3/GACClO2/GAC,1试验材料与方法111,11Tab.1QualityofparanitrobenzoicacidwastewaterpHCOD/(mg#L-1)BOD5/(mg#L-1)4.1109601080112(GAC),,,,(2%)HCl()1B1,113O3/GAC11/Fig.1SchematicdiagramofO3/GACequipmentClO2/GACO3/GAC,ClO2,O3,ª100mm@1000mm,5L,,;,(,2~3mm)11411411,,,//11412O3/GAC:(2L)20%,,(400mg/L),ClO2/GAC:,,,,11413O3/GACClO2/GAC,,;ClO2/GACO3/GAC,,115CODBOD5pH[10]2结果与讨论211pH,O3/GAC22,COD,COD,400mg/L,COD52.1%,#74#第24卷第1期中国给水排水~400mg/L4CODFig.4EffectofClO2dosageonCODremoval214ClO2/GACClO2300mg/L,ClO2/GACCODBOD5/COD55ClO2/GACFig.5ImprovementofbiodegradabilitybyClO2/GACprocess5,ClO2/GAC30minCOD7100mg/L,35.2%;BOD5/COD0.100.25,215,,,COD5000~7000mg/L,,,,COD,O3/GAC)ClO2/GAC22,O3/GAC)ClO2/GAC,COD75.46%,BOD5/COD#75#丁春生,等:二级氧化工艺预处理对硝基苯甲酸废水的研究第24卷第1期0.100.46,2O3/GAC)ClO2/GACTab.2PollutantsremovalofO3/GAC-ClO2/GACprocessO3/GACClO2/GACCOD/(mg#L-1)51602690BOD5/(mg#L-1)17341230BOD5/COD0.340.46ClO2/GAC)O3/GAC33ClO2/GAC)O3/GACTab.3PollutantsremovalofClO2/GAC-O3/GACprocessClO2/GACO3/GACCOD/(mg#L-1)71003190BOD5/(mg#L-1)18101530BOD5/COD0.250.483,ClO2/GAC)O3/GAC,COD70.89%,BOD5/COD0.100.48,,ClO2/GAC)O3/GACO3/GAC)ClO2/GAC,O3/GAC)ClO2/GAC3结论¹O3/GACClO2/GAC,COD52.4%35.2%,BOD5/COD0.25COD,ºO3/GAC)ClO2/GAC,COD75%,BOD5/COD0.100.46,,:[1]AndreozziR,CaprioV,InsolaA,etal.Advancedoxida-tionprocesses(AOP)forwaterpurificationandrecovery[J].CatalysisToday,1999,53(1):51-59.[2]CamelV,BermondA.Theuseofozoneandassociatedoxidationprocessesindrinkingwatertreatment[J].Wa-terRes,1998,32(11):3208-3222.[3]LiJunwen.Trihalomethanesformationinwatertreatedwithchlorinedioxide[J].WaterRes,1996,30(10):2371-2376.[4]JoseRParga,DavidLCocke.Oxidationofcyanideinahydrocyclonereactorbychlorinedioxide[J].Desalina-tion,2001,140:289-296.[5],,.[J].,2003,4(11):39-43.[6],,,./[J].,2000,20(2):159-162.[7],.[M].:,2001.[8]GraciaR,CortesS,SarasaJ,etal.TiO2-catalysedozona-tionofrawEbroriverwater[J].WaterRes,2000,34(5):1525-1532.[9]KarpelVelLeitnerN,GombertB,LegubeB,etal.Im-pactofcatalyticozonationontheremovalofachelatingagentandsurfactantsinaqueoussolution[J].WaterSciTechno,l1998,38(4-5):203-209.[10].(4)[M].:,2002.:13958056597E-mail:[e-mail]:2007-07-28#76#第24卷第1期中国给水排水