Fenton组合工艺处理焦化厂生化出水的应用研究蒋文新

:,,1979,,。#。Fenton组合工艺处理焦化厂生化出水的应用研究蒋文新1　段　俊1　李冰璟1　吕　燕1　刘婉冬1　应维琪1#　李美宁2　俞　源2　成银梅2(1.,200237;2.,200241)　　　Fenton、Fenton+Fenton+。,Fe2+、H2O256、27.2mg/L,FentonUV254、(VIS380)、COD;Fenton+UV254、VIS380、COD,,;Fenton+UV254、VIS380、COD,《》(GB8978—1996)。　　　Fenton　　IntegratedFentonoxidationprocessesforadvancetreatmentofabiotreatedcokingplanteffluent　JiangWenxin1,DuanJun1,LiBingjing1,LvYan1,LiuWandong1,YingWeichi1,LiMeining2,YuYuan2,ChengYinmei2.(1.SchoolofResourcesandEnvironmentalEngineering,EastChinaUniversityofScienceandTechnology,Shanghai200237;2.ShanghaiCokingandChemicalCorporation,Shanghai200241)Abstract:　TheeffectivenessofFentonoxidation,FentonoxidationplusactivatedcarbonadsorptionandFentonoxidationplusBACprocessfortreatingabiotreatedcokingplanteffluentwascompared.Fentonoxidationwereeffec-tiveforremoving50%oftheorganicconstituents,measuredasUV254(aromaticorganics),VIS380(coloringredi-ents)andCOD;Fentonoxidation,inaddition,wascapableofdestroyingcomplexcyanidepresentinthesample.Usingtheoptimaldosesofferroussulfate(Fe2+=56mg/L)andH2O2(27.2mg/L),theFentonoxidationremoved60%oftheorganicconstituentsand95%oftotalcyanideofthebiotreatedcokingplanteffluent.Fentonoxida-tionsignificantlyenhancedadsorptivecapacitiesofactivatedcarbonfororganicconstituentsofthetreatedsampleandalsomakingthemmorebiodegradable.TheintegratedFentonoxidationandBACprocessisthemostpracticalad-vancedtreatmentprocessformeetingtheexistingeffluentdischargelimits(GB8978—1996,Integratedwastewaterdischargestandard)(COD50mg/L,totalcyanide(0.5mg/L).Keywords:　Fentonoxidation;carbonadsorption;BAC　　NH+4-N、、、、、、、[1],、、,NH+4-N、,,,[2]。,20051.8×108m3,2%。,COD1.25×105t,NH+4-N1.9×104t,2065.5t,2.5%、4.6%、8.5%。,。　　1894,FENTON[3]Fe2+H2O2。HUANG[4]2070Fenton。FentonFe2+H2O2,·OH[5],,(POPs)[6,7],,[8],[9,10]。Fenton·OH[11](1)(7)。Fe2++H2O2※Fe3++·OH+OH-(1)Fe3++H2O2※Fe2++·OOH+H+(2)·OH+H2O2※HO2·+H2O(3)·52·　　31　3　20093DOI:10.15985/j.cnki.1001-3865.2009.03.018·OH+Fe2+※Fe3++OH-(4)·OOH+H2O2※O2+H2O+·OH(5)RH+·OH※R·+H2O(6)R·+O2※ROO·※CO2+H2O(7)　　,Fenton、Fenton+Fenton+,Fenton;,(UV254、(VIS380)COD);。1　1.1　水样来源,:COD85.0～150.0mg/L,UV2541.300～1.800,VIS3800.350～0.500,5.00～16.00mg/L,pH6.8～7.0。1.2　材料、仪器和试剂:(),,。　　:UnicoUV2000—;;DBR200();4041/KSM2Braun;;;。　　:(Fe3+11%),(),FeSO4·7H2O、、、、、、、、(),(),30%()H2O2,。1.3　分析方法COD:[12];UV254:1cm254nm;VIS380:1cm380nm;H2O2:。1.4　Fenton氧化实验200mL6,,FeSO4·7H2O(6g/L),FeSO4·7H2O,H2O2,20min,1mol/LNaOHpH7,5min,Fe3+,,,COD、UV254、VIS380。1.5　活性炭吸附实验[13],[13],[14]。1.6　生化性评价实验,,24h;Fenton,48h。(Fenton),,250mL,,50mg/L,,,,。1.7　生物活性炭柱处理实验4(、、),2LFenton,,,,。()()。,Fenton12L,0.7mL/min。Fenton,Fen-ton。2　2.1　优化Fenton氧化工艺处理焦化厂生化出水Fenton,·OHH2O2、Fe2+。H2O2、Fe2+,1、2。1,H2O2,COD、UV254、VIS380。H2O2,。H2O2,·OH,(6);H2O2,·OH1　H2O2Fig.1　EffectofH2O2doseontheFentontreatmenteffectiveness·53·　Fenton2　Fe2+Fig.2　EffectofFe2+doseontheFentontreatmenteffectivenessH2O2(3)[15]。2,Fe2+,COD、UV254、VIS380。Fe2+,[16]。,H2O2、Fe2+27.2、56mg/LFenton。　　,。,Fenton(90%),《》(GB8978-1996)。　　pH,3。3,pH,[Fe(H2O)]2+H2O23　pHFig.3　EffectofpHadjustmentontheFentontreatmenteffectiveness,·OH,pH(2);pH,、,H2O2,Fe3+Fe2+,·OH。FentonpH3.0～5.0,,pH。2.2　Fenton氧化+活性炭工艺深度处理焦化厂生化出水的可行性,。,UV254、VIS380、COD,、Fenton。1　2Freundlich1)Table1　TheFreundlichisothermmodelparametersfortwoadsorberfeedsamplesK1/nR2UV2542.5631.1940.9905VIS3801.7270.9760.9738COD0.0651.8730.99501.8290.4790.9794UV2546.4200.9380.9996FentonVIS3808.7340.9940.9739COD0.0023.2520.98621.3460.5690.9490　　:1)K、nFreundlich。　　12UV254、VIS380、CODFreundlich。　　,4,Fenton,2。2,Fenton。2.3　Fenton氧化工艺对提高焦化厂生化出水生化性能的作用,2　2Table2　IsothermbasedcarbonrequirementsfortwoabsorberfeedsamplesFentonFentonFentonFentonUV2541.7230.888VIS3800.4110.174COD/(mg·L-1)88.948.8/(mg·L-1)5.030.24/(g·L-1)0.350.150.570.110.290.071.300.40·54·　　31　3　20093,,。,。,(4,),。4　Fig.4　DOdecaycurves　　Fenton,4,Fenton1,Fenton,;3,,Fenton,,。2.4　Fenton氧化+生物活性炭工艺对焦化厂生化出水中有机物的去除效果Fenton,,、、、,。3,Fenton+UV254、VIS380COD57,GB8978—1996。　　57,,UV254、VIS380COD,3　Table3　OperatingconditionsofthefivesmallBACadsorbers/g/cm/cm(EBCT)/minA14.11.713.940H2O2:40mg/LB10.51.713.740H2O2:40mg/LC14.01.713.840H2O2:40mg/LD10.71.713.940H2O2:40mg/LE13.71.713.640H2O2:40mg/L·55·　Fenton、。,,,,,,;,,。30d,4,UV254、VIS380COD60%;35～40d,UV254、VIS380COD40%。,,,,。　　、、(4),4Fenton,,。4　4Table4　Adsorptivecapacityindicatorsofactivatedcarbonsamples81111431342.3126115430316.71111033307105.0678371508.22.5　Fenton氧化+生物活性炭工艺对焦化厂生化出水中总氰的去除效果Fenton(0.7mg/L),,,Fenton+(8)。8　Fenton+Fig.8　PerformanceoftheFenton+BACprocessintreatingcokingplanteffluent:totalcyanide　　8,,GB8978-1996(0.5mg/L);,0.4mg/L。,Fenton+,。[17,18]。3　　(1)Fe2+H2O256、27.2mg/L,FentonUV254、VIS380COD;Fenton。(2)Fenton+,。(3)Fenton+,,,。:[1]　QIANY,WENY,ZHANGH.Efficiencyofpre-treatmentmethodsintheactivatedsludgeremovalofrefractorycom-poundsincoke-plantwastewater[J].WaterRes.,1994,28(3):701-710.[2]　LIMBR,HUHY,FUJIEK.Biologicaldegrationandchemi-caloxidationcharacteristicsofcoke-ovenwastewater[J].Wa-terAirandSolidPollution,2003,146(1/2/3/4):23-33.[3]　FENTONHJH.Oxidationoftartaricacidpresenceofiron[J].J.Chem.Soc.,1894(65):899-910.[4]　HUANGCP,DONGC,TANGZ.Advanc