短程硝化铁炭微电解工艺处理焦化废水苏莹

　2009291　　　　　　　　　　　　　ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY[]2008-07-02;[]2008-09-17。[](1983—),,,,。15841290637,[e-mail]。:,13314120036,[e-mail]。—　,,　,,　(,114051)[],—。,—。:pH3.0,70min,[m(Fe)∶m(C)]1.0∶1.3,pH9.0。,TN8.0%,—NO-2-N57.0%,TN50.0%。[];;;;[]X703　　　[]A　　　[]1006-1878(2009)01-0047-04TreatmentofCokingWastewaterbyShortcutNitrification-Iron-carbonMicro-electrolysisProcessSuYing,ShanMingjun,ShenXue,CaoTianyu,LiYang(DepartmentofEnvironmentalEngineering,UniversityofScienceandTechnologyLiaoning,AnshanLiaoning114051,China)Abstract:Usingwastecorundum-graphitepowderandscrapironaselectrodes,thedenitrificationofcokingwastewaterwascarriedoutseparatelybyiron-carbonmicro-electrolysisprocessorshortcutnitrification-iron-carbonmicro-electrolysisprocess.Theexperimentalresultsshowthatthedenitrificationeffectbyshortcutnitrification-iron-carbonmicro-electrolysisprocessisbetterthanthatbyiron-carbonmicro-electrolysisprocess.UndertheoptimumreactionconditionsofwastewaterpH3.0,reactiontime70min,massratioofFetoC1.0∶1.3andcoagulationpH9.0,theremovalrateofTNbyiron-carbonmicro-electrolysisprocessis8.0%,howevertheremovalratesofNO-2-NandTNbyshortcutnitrification-iron-carbonmicro-electrolysisprocessare57.0%and50.0%,respectively.Keywords:shortcutnitrification;micro-electrolysis;cokingwastewater;denitrification;wastewatertreatment　　　[1,2]。、,、。,,、、、,,,,。,,[3]。·47·　　　　　　ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY　　　　　　200929,,—。,,、、、。1实验部分1.1,(TN)360.0～430.0mg/L,pH9.0。。;。SK2-01:;HLJ100:。1.2,,pH1.0～6.0。,。1∶(0.7～1.9),180r/min,20～90min。NaOHpH8.0～9.5,,NH+4-N、NO-2-N、NO-3-N、TN。1。1　1　;2　;3　1.3　1.3.1　[4,5],,,,,。　　　:Fe-2e※Fe2+(1)　　　:2H++2e※H2(2)[6]　　　:O2+4H++4e2H2O(3)　　　:O2+2H2O+4e4OH-(4)1.3.2　H+H+,NO-2-N、NO-3-N[7]。1.3.3　Fe2+Fe2+,Fe(OH)2Fe(OH)3,。　　　Fe2++2OH-Fe(OH)2(5)　　　4Fe2++8OH-+O2+2H2O4Fe(OH)3(6)Fe(OH)2Fe(OH)3,,、[8,9]。1.3.4　pH、[m(Fe)∶m(C)],。　　　NO-2+4H++3e1/2N2+2H2O(7)　　　NO-3+6H++5e1/2N2+3H2O(8)pH、m(Fe)∶m(C),。　　　NO-2+8H++6eNH+4+2H2O(9)　　　NO-3+10H++8eNH+4+3H2O(10)2　结果与讨论2.1　pHpH2。2:pH1.0,TN32.0%,—TN74.8%,NO-2-N100%;pH,。,pH9.0,pH1.0～2.5,34.60/m3;pH5.8～6.5,pH1.0～2.5,16.00/m3,。pH3.0,TN3.0%,—TN32.1%,NO-2-N·48·　1.—45.6%,pH3.0,0.58/m3。,—pH3.0。2.2　3。3:,;70min,,TN3.5%,—TN32.1%,NO-2-N25.5%;,。,—70min。,,,N2,,,NH3-N,。,,Fe2+,Fe3+,。2.3　pHpH4。4,pH9.0,TN7.6%,-TN49.1%,NO-2-N56.0%。pH,,[10,11],,。,NaOH。2.4　m(Fe)∶m(C)m(Fe)∶m(C)5。5:m(Fe)∶m(C)1.0∶(1.2～1.5),NO-2-N、TN;m(Fe)∶m(C)1.0∶1.3,,TN6.0%,-TN51.0%,NO-2-N57.0%。2.5　pH3.0、70min、m(Fe)∶m(C)1.0∶1.3、pH9.0,-,6。6:TN385.0mg/L,·49·　　　　　　ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY　　　　　　200929TN354.2mg/L,TN8.0%;TN370.0mg/L;—TN370.0mg/L192.4mg/L,TN50.0%。,—。3　结论a)—,。:pH3.0,70min,m(Fe)∶m(C)1.0∶1.3,pH9.0。,TN8.0%,—NO-2-N57.0%,TN50.0%。b)—,、,。　　　1　,,.—USAB—.,2008,28(4):344～3472　,,.SBR.,2007,27(6):539～5423　,,.—Fenton.,2008,28(8):34～374　,..,2002,3(4):69～725　,,..,1998,17(3):26～276　..:,2004.50～957　JohnsonTL.Kniticsofhalogenatedorganiccompounddegradationbyironmetal.EnvironSciTechnol,1996,30:2634～26408　JinXie.Applicationofironchipsinindustrywastewater.IndWasterTreat,1989,9(6):73～769　ChiPaohuang,HuangWenwang,ChuPeichun.Nitratereductionbymetallicron.WaterRes,1998,32(8):2257～226410　,,..,2006,32(4):68～7011　,,..,2007,20(1):29～33(编辑　祖国红)··,:,1000mg/L,,50mg/L。,、,,、、,,。/CN101234959,2008-08-06　·50·