电絮凝法处理汽车工业含油废水：操作参数的统计优化。

Treatment of automotive industry oily wastewater by electrocoagulation: statistical optimization of the operational parameters.

机构信息

GIPAB: Grupo de Investigación en Procesos Ambientales y Biotecnológicos, Departamento de Ingeniería de Procesos, Universidad EAFIT, Carrera 49 #7 sur 50, Medellín, Colombia.

出版信息

Water Sci Technol. 2009;60(10):2581-8. doi: 10.2166/wst.2009.519.

DOI:10.2166/wst.2009.519

PMID:19923764

Abstract

An electrocoagulation process was used for the treatment of oily wastewater generated from an automotive industry in Medellín (Colombia). An electrochemical cell consisting of four parallel electrodes (Fe and Al) in bipolar configuration was implemented. A multifactorial experimental design was used for evaluating the influence of several parameters including: type and arrangement of electrodes, pH, and current density. Oil and grease removal was defined as the response variable for the statistical analysis. Additionally, the BOD(5), COD, and TOC were monitored during the treatment process. According to the results, at the optimum parameter values (current density = 4.3 mA/cm(2), distance between electrodes = 1.5 cm, Fe as anode, and pH = 12) it was possible to reach a c.a. 95% oils removal, COD and mineralization of 87.4% and 70.6%, respectively. A final biodegradability (BOD(5)/COD) of 0.54 was reached.

摘要

采用电凝聚工艺处理来自哥伦比亚麦德林市汽车工业的含油废水。构建了由四个平行电极（铁和铝）组成的双极配置的电化学电池。采用多因素实验设计评估了多个参数的影响，包括：电极类型和布置、pH 值和电流密度。油和油脂去除率被定义为统计分析的响应变量。此外，在处理过程中监测了 BOD(5)、COD 和 TOC。结果表明，在最佳参数值（电流密度=4.3 mA/cm(2)、电极间距=1.5 cm、铁作为阳极、pH=12）下，可实现约 95%的油去除率、87.4%的 COD 和 70.6%的矿化率。最终达到了 0.54 的可生物降解性（BOD(5)/COD）。