电镀废水有机污染物的电催化氧化中试研究  

ELECTROCATALYTIC OXIDATION OF ORGANIC POLLUTANTS IN ELECTROPLATING WASTEWATER IN PILOT SCALE

作　　者：叶宽伟[1] 万先凯[1] 蒋健翔[1] 史惠祥[1] 

机构地区：[1]浙江大学环境与资源学院环境工程研究所,浙江杭州310027

出　　处：《水处理技术》2011年第2期65-68,共4页Technology of Water Treatment

基　　金：国家水体污染控制与治理科技重大专项课题(2008ZX07101-006-09);嘉善县科技计划项目(2008A17)

摘　　要：采用新型钛基网状电极对电镀废水进行了电催化氧化研究,在间歇试验条件下考察了电流密度、处理时间和原水初始pH对有机污染物处理效果的影响,在连续试验条件下考察了工艺的稳定性,并结合GC-MS中间产物分析探讨了电催化氧化对废水可生化性的影响。结果表明,处理时间、电流密度和原水起始pH对COD去除效果有显著影响,优化的试验参数为:电流密度100 A.m-2,处理时间3 h,起始pH为中性。在该条件下,废水COD可由439 mg.L-1降至70 mg.L-1,且装置运行稳定,吨水处理能耗为5.7 kWh。长链烷烃等大分子有机物在电催化氧化过程中被分解为短链烷烃和小分子有机物,废水可生化性得到显著改善。The electrocatalytic oxidation of electroplating wastewater using a novel Ti based reticulate electrode was studied in the pilot-scale conditions. The effect oft.he current density, treatment time and initial pH on COD removal was investigated by intermittent experiments, and the stability of this process was examined by continuous experiments. Results showed that the current density, treatment time and initial pH had a significant impact on the COD removal. The optimal experimental parameters were as follows： the current density was 100 A·m2, the treatment time was 3 h, and the initial pH was neutral. Under the conditions, the COD was degraded from 439 mg.L-1 to 70 mg. L-1 while the equipment run stably, and the energy eunsumption was 5.7 kWh .t-1 Maeromolecular organic compounds such as long-chain alkanes were broken down into small molecule organic compounds, and the biodegradability of effluent was evidently improved by the electrocatalytic oxidation.

关 键 词：电镀废水 有机污染物 电催化氧化 钛基网状电极 

分 类 号：X781.1[环境科学与工程—环境工程] TQ031.7[化学工程]