Fenton氧化混凝沉淀OAO工艺处理焦化废水袁翀

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INDUSTRIALWATER&WASTEWATERVol.49No.1Feb.,20181,2(1.,610225;2.,610065)、、,、、80%[1],、、、[2]。A/A/OA/O/O,,CODCr、[3];US/Fenton、/Fenton、、,、[4],。Fenton、:Fenton--O/A/O,、pH、Fe2+H2O2,Fenton;O/A/O,、、pHCODCr。,Fenton2.5h、pH6、Fe2+H2O21∶6、Fe2+300mg/L,CODCr53%;O/A/O、、pH,,GB8978—1996《》。:;Fenton;CODCr;:X703.1:A:%1009-2455(2018)01-0024-04TreatmentofcokingwastewaterbyFentonoxidation-coagulationsedimentation-O/A/OprocessYUANChong1,SUNWei-yi2(1.TheSouthwestResearch&DesignInstituteofChemicalIndustryCo.,Ltd.,Chengdu610225,China;2.SchoolofArchitectureandEnvironment,SichuanUniversity,Chengdu610065,China)Abstract:Fentonoxidation-coagulationsedimentation-O/A/Oprocesswasusedtotreatcokingwastewater.Bychangingreactiontime,influentpHvalue,Fe2+andH2O2dosage,theoptimalconditionforpretreatmentofcokingwastewaterusingFentonoxidationwasstudied;andthen,O/A/Oreactorwasusedtopurifythemixtureofequalpartspretreatedcokingwastewateranddomesticsewage,theeffectofrefluxratio,aerationmode,influentwaterpHvalueonremovalratesofCODCrandammonianitrogenwasdiscussed.Thestudyresultsshowedthat,undertheconditionthatthereactiontimeofFentonoxidationprocesswas2.5h,theinfluentpHvaluewas6,themassratioofFe2+toH2O2was1∶6,themassconcentrationofFe2+was300mg/L,theremovalrateofCODCrincokingwastewatercouldreachabout53%.Itcoulddrawaconclusionthat,O/A/Ohadastableperformanceoncokingwastewatertreatmentwhentherefluxratio,aerationmodeandinfluentwaterpHvaluewascontrolledrea-sonably,andtheeffluentwaterqualitymettherequirementofgrade1inGB8978—1996IntegratedWastewaterDischargeStandard.Keywords:cokingwastewater;Fentonoxidation;CODCr;ammonianitrogenFenton--O/A/O·24·,[5]。,FentonO/A/O,,CODCr,GB8978—1996《》。11.1,1。1.21.2.1FentonFenton5L,50cm,,H2O25cm。,FeSO4,,H2O2,。1.2.2O/A/O5L,O1、A、O23,1∶2∶2,O2A,、。,45%。1.31.3.11。1.3.2Fenton、pHFenton[6-7],FeSO4H2O2。4,Fenton,,CODCr,。:NaOHpH,3mg/LPAM,30min。1.3.3O/A/O45%,MLSS4000mg/L,24h,,,[8]。。30d,。,FentonpH8,O/A/O,,[9]。O/A/O,30minCODCr,O/A/O。1.4CODCr,。22.1Fenton2.1.1pHCODCrFe2+400mg/L,Fe2+H2O21∶10,pH,Fenton,2。Fenton:Fe2++H2O2→Fe3++·OH+OH-(1)pHρ(CODCr)/(mg·L-1)ρ(BOD5)/(mg·L-1)ρ()/(mg·L-1)ρ(SS)/(mg·L-1)5.9~6.33625~4125633~752279~361<2001Tab.1RawwatercharacteristicsFeSO4H2SO4FentonO/A/OH2O2PAMNaOHNa2CO31Fig.1Testflow2pHCODCrFig.2EffectofreactiontimeonpHvalueandCODCrremoval0.51.01.52.02.53.0/hCODCr/%605040302010pH=3pH=4pH=5pH=6pH=7,:Fenton--O/A/O·25·INDUSTRIALWATER&WASTEWATERVol.49No.1Feb.,2018Fe2++·OH→Fe3++OH-(2)2,CODCrpH。·OH,,pH,FentonOH-,·OH,CODCr。pH3~6,2.5~3.0h,CODCr。,:2.5h、pH6。2.1.2Fe2+H2O2CODCrFe2+H2O2CODCr,3。3,Fe2+H2O21∶10~1∶6,CODCr,Fe2+H2O21∶6~1∶2,CODCr。(2),Fe2+H2O2,Fe2+,·OH;Fe2+H2O2,Fe2+·OH,·OH,CODCr。Fe2+H2O2,CODCrFe2+H2O2,Fe2+300mg/L,。CODCr,2.5h、pH6、Fe2+H2O21∶6、Fe2+300mg/L,Fenton,CODCr53%。2.2O/A/OO/A/O,40h,、pH,O/A/OCODCr,3。O/A/O2。2.2.1O2ACODCrO1、O2,pH8,O2A0、1、23,CODCr,4。4,0~2,CODCr,,CODCr。,,O2NO3-AN2,CODCr;,A,,,CODCr。3,O2A,。,,1,1,AO2NO3-,O2;,O2,,。2.2.2CODCrO2A1、pH8,、、、,O1O2、O1O22∶1、3Fe2+H2O2CODCrFig.3EffectofFe2+andH2O2dosageonCODCrremoval100200300400500Fe2+/(mg·L-1)CODCr/%7060504030201∶101∶81∶61∶41∶2pHρ(CODCr)/(mg·L-1)ρ(BOD5)/(mg·L-1)ρ()/(mg·L-1)ρ(SS)/(mg·L-1)8935~1967366~520159~22331~542O/A/OTab.2InfluentwatequalityofO/A/Oreactorduringcontinuousoperation4O2ACODCrFig.4EffectofrefluxratiovariationfromO2toAonCODCrandammonianitrogenremoval0123//%10090807060CODCr·26·O2O12∶1、O1O22∶1,CODCr,5。5,O22∶1CODCr、,,。CODCr、,O2,,;O1,O2,。2.2.3pHCODCrO2A1、,pH6.5、7.0、7.5、8.0、8.5,CODCr6。6,pH6.5~8.5,CODCr。,O/A/O,,,pH;,,,,pH。2.2.4O/A/OO2A1、、pH8,O/A/O2,3。3,,O/A/O,CODCr、、BOD5、SSpHGB8978—1996。3(1)Fenton--O/A/OCODCr,CODCr,。(2)Fenton·OH,2.5h、pH6、Fe2+H2O21∶6、Fe2+300mg/L,Fenton-CODCr,53%。(3)O2A1、O22∶1、pH8,O/A/O,CODCr、、BOD5、SSpHGB8978—1996。(4),O/A/OO2A,O2,CODCr。:[1],,.O/A/O5CODCrFig.5EffectofaerationmodeonCODCrandammonianitrogenremoval/%10090807060CODCr6pHCODCrFig.6EffectofpHvalueonCODCrandammonianitrogenremoval6.57.07.58.08.5pH/%10090807060CODCrpHρ(CODCr)/(mg·L-1)ρ(BOD5)/(mg·L-1)ρ()/(mg·L-1)ρ(SS)/(mg·L-1)6~9≤100≤30≤15≤706.5~7.373~825~711~15<53O/A/OTab.3EffluentwaterqualityofO/A/Oreactorduringcontinuousoperation(45),:Fenton--O/A/O·27·[J].,2006,37(5):37-40.[2],,,.[J].,2007,27(7):1094-1100.[3],,.[J].,2002,22(7):1-4.[4],,,.-UASB-A/O2[J].(),2013,41(1):111-115.[5],,.Fenton-A2O[J].,2015,46(6):46-49.[6],,.Fenton[J].,2016,47(2):18-21.[7],.-Fenton[J].,2017,48(1):28-32.[8],,.[J].,2006,28(4):330-334.[9],,,.[J].,2009,29(4):740-746.:(1982-),,,,,,()yuanchong39@126.com。:2017-11-02()B1、,B2,B3,B4。4,,4,:B1、B2、B4、B3,B1,,。,。:[1],,,.[J].,2012,42(7):93-100.[2],.[J].,2000,13(2):86-88.[3],.[J].,2010,38(11):5813-5816.[4],,.[J].,2013,7(12):4714-4719.[5].[J].(),2005,24(4):116-119.[6]TELLEZGT,NIRMALANK,GARDEAJL.Performanceevaluationofanactivatedsludgesystemforremovingpetroleumhydrocarbonsfromoilextractionwastewaterproducedwater[J].AdvEnvironRes,2002,6(4):455-470.[7],,,.[J].,2015,46(5):1-5.[8],,,.[J].,2012,34(6):37-41.[9],,.[J].,2010,4(12):2694-2698.[10],.、[J].,2003,19(4):76-78.[11],,,.[J].,2011,33(s1):20-22.[12],,,.AHP[J].,2015,27(6):1037-1041.[1

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