印染废水膜浓缩液微电解处理工艺研究

Study on micro-electrolytic treatment of membrane concentrate of printing and dyeing wastewater

采用微电解工艺处理印染废水生化出水膜浓缩液,考察了微电解填料、pH、固液体积比、曝气量和反应时间对COD去除率的影响。结果表明,采用自制的T-20多元微电解填料,当进水pH为4.0,固液体积比为1∶6,曝气量为1.2 L/min,反应时间为60 min时,COD去除率可达80.38%。T-20微电解填料具有多元微电解体系结构,内部孔隙发达,相比于二元微电解填料,能加速微电解反应电子传递速度,促进膜浓缩液中有机物的降解。

The microelectrolysis process was used to treat membrane concentrate from biochemical effluent of printing and dyeing wastewater.The effects of microelectrolytic fillers,pH,solidliquid volume ratio,aeration rate and reaction time on COD removal rate were investigated,respectively.The results showed that when the influent pH was 4.0,the solidliquid volume ratio was 1∶6,the aeration rate was 1.2 L/min,and the reaction time was 60 min,the COD removal rate reached 80.38%by using the homemade T-20 microelectrolysis filler.The analysis showed that the T-20 microelectrolysis filler had a multielement microelectrolysis system structure and high porosity.Compared with the binary microelectrolysis filler,it could accelerate the electron transfer speed of microelectrolytic reaction and promote the degradation of organics in the membrane concentrate.