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

被引：12
|
作者：
GilPavas, Edison [1 ]
Molina-Tirado, Kevin [1 ]
Angel Gomez-Garcia, Miguel [2 ]
机构：
[1] Univ EAFIT, Dept Ingn Proc, GIPAB, Medellin, Colombia
[2] Univ Nacl Colombia, Dept Ingn Quim, GIANT, Sede Manizales, Colombia
来源：
WATER SCIENCE AND TECHNOLOGY | 2009年 / 60卷 / 10期
关键词：
Al electrode; electrocoagulation; Fe electrode; oily wastewater; optimization; EMULSIONS; COAGULATION; REMOVAL; ELECTROFLOTATION; DECOLOURIZATION; DESTABILIZATION; SYSTEM;
D O I：
10.2166/wst.2009.519
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
An electrocoagulation process was used for the treatment of oily wastewater generated from an automotive industry in Medellin (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 BOD5, COD, and TOC were monitored during the treatment process. According to the results, at the optimum parameter values (current density 4.3mA/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 (BOD5/COD) of 0.54 was reached.
引用
收藏
页码：2581 / 2588
页数：8
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