电凝聚气浮法处理印染废水

ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY2006264[]2006-02-27;[]2006-04-06[](1978),,,,:029-83208078;:[e-mail]1,2,1,1(1.,710032;2.,710054)[](),pHCOD,pH=6.51.0A25min,COD90%,1.0~1.9A,COD;pH3.45~11.46,COD80%,[];;;[]X703[]A[]1006-1878(2006)04-0280-03TreatmentofDyeingWastewaterbyElectrocoagulation-FlotationProcessLiuZengchao1,2,LiuWenhui1,ZhengXianjun1(1.SchoolofMaterialsandChemicalEngineering,XianTechnologicalUniversity,XianShaanxi710032,China;2.XianUniversityofScienceandTechnology,XianShaanxi710054,China)Abstract:Thestimulateddyeingwastewaterwastreatedbyelectrocoagulation-floatationprocess.TheeffectsofwastewaterpH,electrolysiscurrentintensityandelectrolysistimeonCODremovalratewerestudied.TheexperimentalresultsindicatethatwhenwastewaterpHis6.5,electrolysiscurrentintensityis1.0Aandelectrolysistimeis25min,CODremovalratecanreachover90%.ThismethodhasawideoperatingconditionrangeandlittledifferenceofCODremovalrate.Undertheconditionsofelectrolysiscurrentintensity1.0-1.9AandwastewaterpH3.45-11.46,CODremovalratecancomeuptoover80%.Dyeingwastewatercanbetreatedbythisprocesswithnoadditionofagentsandnosecondarypollution.Keywords:electrocoagulation;floatation;dyeingwastewater;wastewatertreatmentCOD[1~5],,,,,1实验部分1.1COD()COD773.6mg/L1.2AlFe,,,Al3+Fe2+;H+,H2Al3+Fe2+,OH-:Al-3eAl3+Fe-2eFe2+!280!4.:2H++2e2[H]H2∀H2OH++OH-4OH--4e2H2O+2[O]2H2O+O2∀,,CO2H2O,[5]H2O2,,1.3NaOH:,0.1mol/L1.4RL-1:2,,1cm,,,,COD2结果与讨论2.1pHCOD62L(COD773.6mg/L),NaOHpH3.45,4.22,6.48,7.73,10.03,11.46,,1.0A,25min,pHCOD11pHCOD#COD;∃COD1,pH3.45~11.46,COD80%;pH6.5,COD,90%;pH,COD,[6]:pH3,Al3+,,,,Al(OH)3,;pH11,Al3+Al(OH)-4,,COD2.2COD62L(COD927.5mg/L),pH=6.5,25min,COD22,,COD;1.0A,COD,COD,,,1.0A2COD#COD;∃COD2.3COD62L(COD927.5mg/L),pH=6.5,1.0A,COD33COD#COD;∃COD3,,COD;25min,,COD[7],Al(OH)3!281!ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY200626,COD,25min3结论a)COD927.5mg/L(),:pH=6.5,1.0A,25min,COD90%b)1.0~1.9A,COD;pH=3.45~11.46,COD80%,1,,..,2004,(4):32~352..,1999,19(5):264~2673,,.COD.,2002,3(3):74~76,854,,.COD.,2000,26(5):33~355,,..,2004,24(2):124~1276,,..,2001,20(3):43~467,..:,2003(编辑祖国红)!!,2006,,2006327,,:,;,,;%&,,2005,132,56,2.7,1.43674,26821750,163,;2000,;,;%&,,,(摘自∋化工环保通讯(2006年第4期),200510∋((),∋(2006312,(摘自∋化工环保通讯(2006年第3期)!282!