铁碳微电解预处理汽车电泳涂装废水

采用铁碳微电解法对汽车电泳涂装废水进行处理,研究其处理效果及COD降解动力学。结果表明,进水pH≤4时,铁碳微电解的处理效果影响因素依次为铁碳反应次数、反应时间、进水pH。COD降解率随微电解反应时间的增加而升高,随反应次数的增加而降低,之后趋向稳定。当进水pH=3,反应时间90~150 min时,铁碳微电解的处理效果可稳定在40%左右。同时通过模拟分析,汽车电泳涂装废水COD降解动力学符合三级反应动力学模型。

Pretreatment of auto electrocoating wastewater by Fe-C micro-electrolysis

Fe-C micro-electrolysis was employed to treat the auto electrocoating wastewater in the present study. The removal efficiency of COD and the related reaction dynamics were investigated. The results show that the Fe-C reaction cycles, reaction time and pH of influent could be the main factors, respectively, that influence the treatment efficiency when the pH of the influent is smaller than 4. The removal rate of COD increased with micro-electrolysis time, and decreased with increasing reaction cycles and then was stable afterwards. When the pH of influent maintained at 3, the removal rate of COD reached 40% after 90~150 minutes reaction. In addition, the simulation analysis indicates that the pretreatment process could be described by third-order reaction kinetics.