超临界水氧化法处理高含量印染废水研究褚旅云

、、、、、、、、、、。、、、、[1]。SCWO。t＞373.85℃p＞22.1MPa、CO2H2ON2N2O、。2、、、[2-5][6-7]。、COD23.5g·L-1。。11.11。、φ6mm×1.5mm31610m50MPa600℃。、、、2J-XZ5/5050MPa0～5L·h-1210009pH、、、COD。pHCODpH9.1、580℃、27MPa200%COD47mg·L-199.8%。CODGB8978－96。pHX791TQ031.7A1000-3770(2009)[e-mail]1Fig.1Theprocessofsequentialsupercriticalwateroxidation35820098TECHNOLOGYOFWATERTREATMENTVol.35No.8Aug.,200984DOI:10.16796/j.cnki.1000-3770.2009.08.021φ6mm×1mm3166m60MPa、15kW。1.230%36%。1.3pH。COD、。。。1hCOD。n=m0(H2O2)×100%/mt(H2O2)。m0(H2O2)H2O2mt(H2O2)H2O2。1.4CODpHpH。22.1pHCOD27MPa200%pHCOD2。2pHCOD。380℃pH13.665.2%pH9.197.23%pH。pH。2.2COD27MPa、200%COD3。3COD。CODpH380℃580℃COD65.2%99.1%pH9.1380℃580℃COD97.25%99.8%COD47mg·L-1。COD。2.3COD500℃200%4。423MPaCOD95.4%29MPaCOD96.5%。COD4681012145060708090100COD
/%pH2pHCODFig.2EffectofpHonremovalefficiencyofCODofwastewater3003504004505005506005060708090100COD
/%
3CODFig.3EffectofreactiontempratureonremovalefficiencyofCODofwastewater85。427MPa。500℃374.3℃、。。2.4COD540℃、27MPa、pH9.1COD5。5COD200%COD。200%。3CODpHCOD。pH9.1、580℃、27MPa200%COD47mg·L-199.8%GB8978－96100mg·L-1[8]。[1].[J].,2007,33(17):41-44.[2],,.[J].,2007,32(10):69~73.[3],,.[J].,1998,22(1):86-89.[4],,.[J].,2002,22(1):17-20.[5],,,.[J].,2000,22(1):1-3.[6]JohnstonJB,HannahRE.CunninghamVL,etal.DestructionofpharmaceuticalandbiopharmaceuticalwastesbytheMODARsupercriticalwateroxidationprocess[J].BioTechnology,1988(6):1423-1427.[7]HarradineDM,BuelowSJ.Oxidationchemistryofenergeticmaterialsinsupercriticalwater[J].HazWaste,1993(10):233-246.[8]GB8978－96[S].4CODFig.4EffectofreactionpressureonremovalefficiencyofCODofwastewater2022242628309092949698100COD
/%pH=13.6pH=9.1pH=7.3
/MPa050100150200250300020406080100COD
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/%5CODFig.5EffectofoxygenexcessonremovalefficiencyofCODofwastewaterSUPERCRITICALWATEROXIDATIONOFPRINTINGANDDYEINGWASTEWATERChuLvyun,LiaoChuanhua,FangXiang(CollegeofMachineryandPowerEngineering,NanjingUniversityofTechnology,Nanjing210009,China)AbstractTheSupercriticalwateroxidation(SCWO)totreatprintinganddyeingwastewaterwasstudied.Theimpactofreactiontemperature,pressure,oxygenexcessandpHonremovalefficiencyofCODwasinvestigated.TheexperimentalresultsshowedthatSupercriticalwateroxidationisefficientforthetreatmentonCOD.AndpHisthemainfactorwhichaffecttheremovalefficiencyofCOD.Withthetemperature580℃,pH9.1thepressure27MPa,theoxygenexcess200%,theremovalefficiencyofCODis99.8%.Keywordssupercriticalwateroxidation;printinganddyeingwastewater;pH;oxidation35886