催化氧化法治理钻井废水的研究鲁红升

催化氧化法治理钻井废水的研究鲁红升1,黄志宇1,赵菲2(1.西南石油学院化学化工学院,四川南充637001;2.重庆天然气净化总厂引进分厂,重庆长寿401236):钻井废水是油气田开发过程中的一个重要污染源,因其具有污染物成分复杂,分布广等特点,对周围环境有很大的影响。以充30#的钻井废水为处理对象,实验研究了类Fenton试剂催化氧化法处理工艺,考察了Fenton试剂投加量、反应条件、反应时间等单因数对处理效果的影响,实验确定了该处理工艺的最佳操作条件为:H2O2为2500mg/L,Fe2SO4·7H2O为70mg/L,pH值为3.5,反应时间为80min,氧气的通入量为70min。废水中的主要污染物指标COD的去除率大于80%。:催化氧化;钻井废水;FENTON试剂;废水处理:X703.1:A:1006-8759(2005)01-0025-03STUDYONDISPOSUREOFDRILLING-WASTEDWATERWITHCATALIZINGANDOXIDIZINGLUHong-sheng2,HUANGZhi-yu1,ZHAOFei2(1.SouthwestPetroleumInstitute,Nanchong637001,China;2.IndroughtPlantofNaturalGasPurifyFactoryInChongqing,Changshou401236,China)Abstract:Itisanimportantandcontaminativesourceoftheprocessofoilfielddevelopment,becauseofitspollutantcompositioncomplicacy,thewideregion,soitinfluencesurroundingsenvironmentverybigly.ThemechanismsofaffectingfactorsintreatingtoxicorganicwastewatersuchasChong30#oilfieldproducedwaterbyFentonreagentwerepreliminarilyinvestigated.Theoptimaloperatingconditionsdeterminedbyorthogonalexperimentsareasfollowing:H2O2=2500mg/L,FeSO4·7H2O=70mg/L,80minandpH=3.5,70minofleadingtheoxygen.Undertheseconditions,theCODremovalisover80%formostexperiments.Keywords:Fentonreagent;wastewatertreatment;drillingwastedwater;catalyzeandoxidize:2004-09-230,,:、,,,,,[1]。,:、、———、。,,,,。,,。、,,。,,,EnergyEnvironmentalProtectionVol.19,No.1Feb.,2005191200521。,。,、,,。11.130,3000m,1000m3,,,。(GB7486-87),1。2COD1.21.2.1混凝剂的筛选:AlCl3、Al2(SO4)3、FeSO4、FeCl3、Fe2(SO4)3、AlCl3、。20%AlCl3、20%Al2(SO4)3、20%FeSO4、20%FeCl3、20%Fe2(SO4)3、20%AlCl3、20%、0.5%PAM。7,100mL,0.5mL、0.1mLPAM,1min,3min,30min,10mL,100mL。,CODcr2。AlCl3Al2(SO4)3FeSO4FeCl3Fe2(SO4)3AlCl3COD/(mg·L-1)968.951159.731608.051030.81051.42948.341072.03COD/(%)64.760.641.362.461.665.460.9pHCODcr/(mg·L-1)/(mg·L-1)Cl/(mg·L-1)/(mg·L-1)/(mg·L-1)6.52741.932020.23882.12352.66395.01111·26·鲁红升等催化氧化法治理钻井废水的研究2:AlCl3(PAC),COD65.4%,。1.2.2最佳絮凝剂量的确定AlCl3,,1。1,,AlCl3COD。AlCl3,1500ppm。1.31.3.1催化剂(FeSO4·7H2O)的投加量1000mg/LFeSO4·7H2O,100mL,,100mLFeSO4·7H2OH2O2(30%),3min,1h,pH8(,H2O2,),,CODcr。2。Fe2+,Fe2+,H2O2,Fe2+,,,;Fe2+,H2O2Fe3+,[3]。,100mL,FeSO4·7H2O6mg,FeSO4·7H2OCODcr,6mg,CODcr。Fe2+,,Fe2+[3～6]。1.3.2pH值的影响Fenton,,Fe2+H2O2·OH,Fe2+pH,pHCODcr3,,pH3,pH3,pHCODcr,pH6,CODcr,Fenton,pH·OH,Fe2+,pH3,H+,,Fe3+Fe2+,,pHFe2+/Fe3+,Fenton。[7～9]1.3.3O2通入量影响,O2CODcr,4。4,,CODcr1h,,CODcr。1.3.4反应时间的影响CODcr5。580min,CODcr,90min,CODcr,·OH,CODcr,。2.3.5H2O2(30%)的投加量的影响H2O2(30%)CODcr6。6,H2O2,CODcr,。H2O2,H2O2,·OH;H2O2,H2O2,Fe2+Fe3+[K=53L(mol·s)-1],Fe3+,H2O2,CODcr[6]。3(1),AlCl31500ppm。191·27·(下转第31页)胡颖华等活性污泥法污水厂剩余污泥微氧消化的中试研究·31·,,。。3:(1),20d,50%,《》(GB18918-2002)40%,。。(2),SS11～28g/L,SS10～15g/L,84.3%SSSS14.5%,SSSS30.5%;90%VSSVSS19%,。(3),,,。20g/L,SS10g/L12%;VSS10g/L15%。,,。(4)。,,,,20d。(5),,,,。,,。(6),,,。:[1].()[M].,P376,385.[2]Kim,M.H.,andHao,O.J.,ComparisonofActivatedSludgeSta-bilizationunderAerobicorAnoxicConditons,ResearchJournalWPCF,Vol.62,PP.160～168(1990).[3]Hao,O.J.andM.H.KimContinuouspre-AnoxicandAerobicDigestionofWasteActivatedSludge,J.EnvironmentalEngineering,ASCE,Vol.116,No.5,P865～879,(1990).[4].[M].,2003,P86.[5].[M].,1989,P278～284.[6](),P370～390.(上接第27页),,CODcr783.41mg/L,CODcr71.43%。(2)Fenton,:pH3.5、O270min、80min、FeSO4·7H2O7mg、H2O2(30%)0.25mL。(3),。:[1],.[J].,1997,26(1).:61～64.[2].[J].,1993,12(2).[3],.Fenton[J].,2000,32(3):93～96.[4].BossmannSH,OloverosE,GobSetal.Newevidenceagainsthy-droxylradicalasreactivrasreactiveintermediatesinthethermalandphotochemicallyenhancedFentonReaction.J.Phys.Chem.A,1998,102(28):5542～5550.[5]HustonPLandPignatelloJJ.Reductionofperchloroalkanesbyfer-rioxalate-generatedcarboxylatradicalprecedingmineralizationbythephoto-Fentonreation.Environ.Sci.Technol.,1996,30(12):3457～3463.[6].-[J].,1985,7(5):1～6.[7],.Fenton[J].,1994,13(3).[8].[M].:,1999,169.[9].—[J]..1998,8(1):39～43.