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BR,,,(,210094):BR,,CODNH+4-N94%93%99%95%,,..:BR;;:A:10065776(2001)02000902ThePretreatmentTechnologyofvatDarkBrownBRDyestuffWastewaterYANXue2yi,YUZong2xue,HULei,ANLi2chao(DepartmentofEnvironmentScience&Engineering,NanjingUniv.ofSci.&Tech.,Nanjing210094)Abstract:Inthispaper,theprocessofneutralization-electrochemicalreduction-coagulationsedimentation-airblowingwasadoptedtotreatthecleaningproduc2tionwastewaterofVatDarkBrownBR.TheremovalratesofCOD,chroma,heavymetalionsandfluoridewere94%,95%,100%and99%respectively.Thebioactivityofthewastewaterwasraised.Thepretreatmentresultedinlighteningtheorganicloadandreducingthetoxicitytobiology.Thepaperemphasedondiscussingthemecha2nismanddeterminatingtheparameter.Keywords:VatDarkBrownBR;Cleaningproductionwastewater;PretreatmentBR(C.I.VatBrown1).Mn2+,.,,.,,Mn,23.5%,.,1.1COD(mg/L)NH+4-N(mg/L)(mg/L)()(mg/L)SS(mg/L)pH80979181265429456173.1510143118721339768.4579106108162510001413.47,,.11.1BR,:,BS97013.:(1975-),,,.,.[13],,,Fe2+,,,[4],COD.Fe2+-,.Fe2+(),,,.BRFe2+,.BR62.8,Fe2+.Fe2+,.,,Fe2+Al3+Fe3+,.1.2Al3+,,[5].,,,,(),,,;-OH,,,,,,1622001,,.Al3+pH5.57.5,,Al(OH)3,Al(OH)3[6].22.1,pH,,Al(OH)3..pH5,HAc-NaAc,Al(OH)3,.,,,,pH6.5.,.,Cu2+.2.2COD(mg/L)()NH+42N(mg/L)(mg/L)(mg/L)pH79191000610816251413.5130050440086.52.2--,,.,.pH11,1COD.3,4.3--123A465564BpH5.06.58.0C(min)101520,:ABC,:,pH,.:55,pH6.5,20min.COD67.0%,50.2.3pH11,,552.5h,COD,5.4--L9(33)ABCpHCOD(mg/L)COD(%)11115.2067046.4921226.0768145.6131338.0379136.8242125.8264852.4252235.7745066.9662318.3363753.2373135.9062355.4483216.3080242.6393329.0063754.43K142.9749.7147.45K257.5449.5050.82K350.8348.1653.07R14.573.575.62(:COD1300mg/L.)5COD(mg/L)NH+4-N(mg/L)pH4804000114004507.53BR---,:(1),;(2),COD94%,NH+4-N93%;99%,;(3),():pH,:55,pH6.5,20min.:[1].[M].:.1998.6.[2],,.[J]..1994,16(1):1821.[3],,,.[J]..1995,15(3):157161.[4].-[J]..1992,11(3):36;[5],,,.HPAM[J]..1997,16(5),552559[6].[M].:.1992.10,,1018.(:2001-05-15)222001