三维三相电极处理印染废水的试验研究

An experimental study of the printing and dyeing wastewater treatment using 3D three-phase electrode

简述了三维电极电化学技术,设计并采用复极性三维三相电极对某厂生产过程中产生的印染废水进行了降解试验,探讨了外加电压、电流密度、曝气量等因素对废水处理效果的影响,分析了电解过程中瞬时电流效率的变化规律。结果表明,该方法处理实际印染生产废水的适宜工艺条件:外加电压25V,电流密度27.27 mA/cm2,主电极极间距为5 cm,曝气量6 L/min,电解时间60 min。印染废水经复极性三维三相电极催化氧化60 min后,脱色率与COD去除率分别达98.5%、87.6%,废水的BOD/COD从0.21提高至0.32,且其在电催化氧化过程的前30 min具有很高的电能利用率。

This paper briefly introduces the 3D electrode electrochemical technology,designs and uses bipolar 3D electrode to degrade the printing and dyeing wastewater from some factory,studies the influences of applied voltage,current density and aeration volume on the treating effect,and analyzes the changing law of instantaneous current efficiency.The optimized technological conditions are worked out: the applied voltage is 25 V,the current density is 27.27 mA/cm2,the working electrodes distance is 5 cm,the aeration volume is 6 L/min and the electrolysis time is 60 minutes.After 60 minutes of catalytic oxidation of bipolar 3D three-phase electrode,the decoloration and the removal of COD can reach 98.5% and 87.6% respectively,the BOD/COD of wastewater can be increased from 0.21 to 0.32,and the power energy utilization in the early 30 minutes of catalytic oxidation is very high.