三维电极系统降解靛蓝废水的工艺探究

为探究三维电极对电化学降解靛蓝废水的影响,在电解池中加入活性炭组成三维电极系统。比较二维电极法和三维电极法的靛蓝废水降解效率,二维电极法的脱色率为96.71%,三维电极法的脱色率98.01%。通过正交实验进一步分析NaCl质量浓度、活性炭用量、电解时间、电压对废水吸光度、COD、可生化性(BOD/COD,简写为B/C)的影响。在优选工艺条件下处理靛蓝废水,对废水吸光度、COD、B/C等3项指标进行灰色聚类分析,获得优化工艺为:电压5V,NaCl10g/L,活性炭1.2g/L,电解60min,此时废水脱色率达到95.84%,COD去除率达到87.5%,B/C为1.57,可生化性好。

Process of degradation of indigo wastewater by three-dimensional electrode system

In order to explore the influence of three-dimensional electrode on the electrochemical degra dation of indigo wastewater,activated carbon was added to the electrolytic cell to form three-dimensional electrode system.The degradation efficiency of indigo wastewater by two-dimensional electrode method and three-dimensional electrode method was compared.The decolorization rate of wastewater by two-dimension al electrode method was 96.71%,and that by three-dimensional electrode method was 98.01%.The effects of NaCl concentration,activated carbon dosage,electrolysis time and voltage on the absorbance,COD and bio degradability of wastewater(BOD/COD,abbreviated as B/C)were further analyzed by orthogonal experiments.Under the optimal process conditions,indigo wastewater was treated.The three indexes of wastewater absor bance,COD and B/Cwere analyzed by grey clustering,and the optimized process conditions were obtained as follows:voltage 5 V,NaCl 10 g/L,activated carbon 1.2 g/L,electrolysis 60 min.At this time,the decolorization rate of wastewater reached 95.84%,COD removal rate reached 87.5%,B/C was 1.57,and biodegradability was good.