超声强化电絮凝处理洗车废水的试验研究  

Experimental study on the ultrasound enhanced electro-coagulation for treatment of car-washing wastewater

作　　者：储金宇[1] 李玉蓉[1] 

机构地区：[1]江苏大学环境学院,城市水资源与水环境国家重点实验室江苏大学研究中心,江苏镇江212013

出　　处：《环境污染与防治》2012年第3期1-3,8,共4页Environmental Pollution & Control

基　　金：国家“十一五”重大科技专项(No.2008ZX07317-001);国家科技支撑计划重点项目(No.2006BAC11B06);江苏省成果产业化推进项目(No.JH07-025)

摘　　要：针对洗车行业对水资源的浪费及污染现状,采用超声强化电絮凝处理洗车废水。考察了电流密度、初始pH、极板间距、处理时间等因素对洗车废水处理效果的影响,并讨论了超声强化电絮凝机制。结果表明,超声强化电絮凝处理洗车废水的最佳条件是电流密度1.500mA/cm2、初始pH无需调节、极板间距为1.5cm、处理20min,COD与浊度去除率分别为68.77%、96.89%,出水达到《城市污水再生利用城市杂用水水质》(GB/T 18920—2002)要求。可见,超声能改变电絮凝反应动力学过程,强化电絮凝去除污染物效果。Series of ultrasound enhanced electro-coagulation treatment were performed on car-washing wastewater in a lab scale reactors to investigate the effect of current density, initial pH, electrodes distance and treat- ment time on COD removal efficiency. The mechanism of ultrasound enhancement on electro-coagulation was ana- lyzed, and optimum treatment conditions were obtained. The results showed that there was no need to adjust pH dur- ing the process of car-washing wastewater treatment, the optimum treatment conditions were electrodes distance l. 5 cm, current density 1. 500 mA/cm2 and treated for 20 min. Under these conditions, the removal efficiency of COD and turbidity was 68.77%, 96.89%, respectively. The treated water could meet water quality standard for urban wa- ter consumption. Furthermore, ultrasound could change the kinetic process of electro-coagulation and then enhance the treatment performance of electro-coagulation.

关 键 词：洗车废水 电絮凝 超声 回用 

分 类 号：X703[环境科学与工程—环境工程]