文章基本信息
- 标题：Optimization of electrocoagulation process to treat grey wastewater in batch mode using response surface methodology
- 本地全文：下载
- 作者：Thirugnanasambandham Karichappan ; Sivakumar Venkatachalam ; Prakash M Jeganathan 等
- 期刊名称：Journal of Environmental Health Science and Engineering
- 印刷版ISSN：2052-336X
- 出版年度：2014
- 卷号：12
- 期号：1
- 页码：29
- DOI：10.1186/2052-336X-12-29
- 语种：English
- 出版社：BioMed Central
- 摘要：
Background
Discharge of grey wastewater into the ecological system causes the negative impact effect on receiving water bodies.
Methods
In this present study, electrocoagulation process (EC) was investigated to treat grey wastewater under different operating conditions such as initial pH (4–8), current density (10–30 mA/cm2), electrode distance (4–6 cm) and electrolysis time (5–25 min) by using stainless steel (SS) anode in batch mode. Four factors with five levels Box-Behnken response surface design (BBD) was employed to optimize and investigate the effect of process variables on the responses such as total solids (TS), chemical oxygen demand (COD) and fecal coliform (FC) removal.
Results
The process variables showed significant effect on the electrocoagulation treatment process. The results were analyzed by Pareto analysis of variance (ANOVA) and second order polynomial models were developed in order to study the electrocoagulation process statistically. The optimal operating conditions were found to be: initial pH of 7, current density of 20 mA/cm2, electrode distance of 5 cm and electrolysis time of 20 min.
Conclusion
These results indicated that EC process can be scale up in large scale level to treat grey wastewater with high removal efficiency of TS, COD and FC.
- 关键词：Electrocoagulation; Grey wastewater; Stainless steel electrodes; Box-Behnken design; Mathematical model
