还原氧化法预处理硝基甲苯废水的工程实践戴建军

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0,,。,,、、。、,;,,,[1-2]。,,,-Fenton,,。1、、、,3,,1,2,1,2,1,2,3,1,2,1,2,3(1.,210046;2.,210046;3.,210093):,300t/d,CODCr8000mg/L、200mg/L、40mg/L,,COD、、、,-Fenton,,。,-Fenton,COD70%,95%,ρ(B)/ρ(C)0.20.45,,,。:;Fenton;;:X7:B:1674-4829(2009)04-0038-03:2009-05-19:(2007015);(BA2006013).:(1973-),,,,,.EngineeringPracticeonNitrotolueneWastewaterPretreatmentwithReductionandOxidationTechnologyDAIJian-jun,LINGHong-ji,LUZhao-yang,LIYe-wen,FANJunAbstract:Alargeamountofwastewaterisgeneratedfromnitrotolueneproductionofsomedomesticchemicalenterprise.Thetotalwastewateris300t/d,andtheinflowCOD,nitrobenzene,volatilephenolis8000mg/L,200mg/Land40mg/Lrespectively.Afterneutralizationpretreatment,thewastewaterisblendedwithothermediumconcentrationwastewater,andhydrolysisandbiochemicaltreatmentarecarriedoutforfurthertreatment.TheoutflowCOD,colority,nitrobenzeneandvolatilephenolexceedthedischargestandardbyasmallmargin.Afterthemodification,thecombinedprocesswithmicro-electrolysisandFentonoxidationisappliedforintensifiedpretreatment.Theengineeringdesignparametersandthemechanismofpollutantsremovalareinvestigated.Technicalandeconomicanalysisiscarriedout.Thepracticeprovesthatcombinedprocesswithmicro-electrolysisandFentontreatmentiscapableofpretreatingwastewaterfromnitrotolueneproduction.TheremovalrateofCOD,nitrobenzeneandvolatilephenolis70%and95%respectively,andtheB/Cratioisimprovedfrom0.2to0.45approximately.Thesystemloadofthefollow-upbiochemicalisreduced,thebiodegradabilityisimprovedandtheoutfloweffluentfrombiochemicaltreatmentisensuredtoreachthedischargestandardsteadily.Keywords:Micro-electrolysis;Fentonoxidation;Nitrotoluenewastewater;Intensifiedpretreatment22420098EnvironmentalScienceandTechnologyVol.22No.4Aug.2009224。,、、,1。1,,-,1。COD80%,。12,。,,pH,,;,ρ(B)/ρ(C)0.2,60~200mg/L,。。pH,。,,[3]。,,+Fenton。,Fenton,H2O2,,PAM,。,。2。233.1:2h;2。Fenton:2h;2。:,6min,2h,1.2m3/(m2·h)。:2h,2。3.2()3.2.1,,1170m3,12.0m×19.5m×5.0m。:2(11),IHF65-40-250,2.2kW,。3.2.2,8.0m×8.0m×5.0m。:2,40m3,,。3.2.3FentonPE,Φ2.2m×2.6m,2。:1,DC5CYEB,0.37kW。3.2.4,7.2m×4.9m×5.0m,2h,1.2m3/(m2·h)。:2,BLY18-23-1.5,BLY18-23-0.75,。1,Φ1.6m×1.5m,2.2kW。3.2.5,220m3,7.3m×7.3m×5.0m,4.5m。:2,IS50-32-200,5.5kW。3.2.6,:12.0m×8.0m×4.0m。:2,XAY80/920-/(t·d-1)300/(mg·L-1)pHρ(CODCr)ρ()ρ()1.8~2.0800020040()Fenton()3920098UB,1.5kW。44.1,,4。,95%,COD70%,,。。4,,,5。,COD400mg/L,15mg/L,ρ(B)/ρ(C)0.20.45,,,。54.2,,,[4]。,FeC,,,,;H2O2Fe2+Fenton,,Fe2+,Fe2+H2O2(·OH),·OH,,,,Fe(OH)3、,[5]。Fenton,,[6]。5200,25.24/m3,300m3/d,300m3/d。83.22kW,63kW。300m2,8。6,7。676-Fenton,,,,,。[][1],,,.Fenton[J].,2007,33(1):30-33.[2],,,.[J].,2005,18(2):40-42.[3],,.、[J].,2006,31(11):1-3.[4].[M].:,2000.[5].Fe3+/MgO-Fenton-[D].:,2006.[6],.[J].,1997,17(2):90-95.()/(mg·L-1)/(mg·L-1)/%ρ(CODCr)8000240070ρ()~2001095ρ()~40295/87113200/%43.5056.50--6260480831.67571.620.871.62.7725.24ρ(CODCr)1000~1100500~600ρ()20~255ρ()~51ρ(BOD5)180~210230~270ρ(B)/ρ(C)0.20.45mg·L-140

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