电化学氧化法去除微污染水中的氨氮

以低氯离子浓度下微污染水中的氨氮(NH4+-N)为研究对象,采用电化学氧化法对污染水中的氨氮进行去除。通过静态和正交实验得到了极板的最佳运行参数。实验结果表明:Cl-浓度在各影响因素中对NH4+-N去除影响最大,且在其他影响因素不变的条件下,通过改变电解电流是解决动态运行时NH4+-N去除率下降较经济有效的方法。最佳运行工艺条件为:电流密度10 mA/cm2,电解时间10 min,极板间距1 cm,溶液初始pH为7,Cl-浓度100 mg/L,面体比102 m2/m3,氨氮的平均去除率在80%以上。

Removal of ammonia from micro-polluted water by electrochemical oxidation process

Taking the micro-polluted raw water with low chloride ion concentration as the object,electrochemical oxidation process was adopted for NH+4-N removal.Through the static and orthogonal test,the optimal operating parameters were obtained.The results showed that Cl-made the greatest impact on the ammonia removal in all of the factors,and the more cost-effective method for preventing decrease of ammonia removal efficiency was changing the electrolytic current when the conditions of the other factors were fixed.The optimal reaction conditions were as follows : current density was 10 mA/cm2,HRT was 10 min,the plate spacing was 1 cm,initial solution pH was 7,Cl-concentration was 100 mg / L,the ratio of area and volume was 102 m2/m3,the average removal rate of ammonia was 80%.