改进型微电解法处理炼焦废水的研究

本实验研究了Fe-Cu微电解法预处理炼焦废水的运行效果,并探讨了Fe-Cu双金属微电解法的反应机理。结果表明最佳运行条件为：HRT为45 min,p H值为4,铁铜质量比为5,曝气量为100 m L/min。此条件下COD的去除率达到35%-40%,酚的去除率达到37-40%。污染物降解动力学过程符合一级反应。共存离子对微电解影响的研究结果表明NO3^-,SO4^2-,NH4^＋离子对铁铜有一定的钝化,导致处理效果降低,而有还原性的S^2-,NO2^-等离子加入则会增加COD。Fe-Cu微电解法预处理炼焦废水是有效的方法。

A Study on the Treatment of Coking Wastewater by Using Improved Micro-Electrolysis Process

The treatment of coking wastewater treatment by Fe- Cu micro- electrolysis process and the mechanism of the reaction were studied. The results showed that the optimum HRT was 45 minutes,p H = 4,Fe / Cu mass ratio was 5 and the aeration was 100 m L / min. The removal rate of COD and phenol reached 35%- 40% and 37-40% respectively. The degradation of COD by electrocatalytic degradation was following the first order reaction kinetics. The coexistent ions such as NO3^-,SO4^2-,NH4^＋reduced COD removal rate,reductive ions such as S^2-,NO2^-increased content of COD. The results indicated that Fe- Cu micro- electrolysis process was an effective means for coking wastewater pretreatment.