Optimization of electrocoagulation process to treat grey wastewater in batch mode using response surface methodology

Journal of Environmental Health Science Engineering

Prakash Maran Jeganathan¹  Sivakumar Venkatachalam²  Thirugnanasambandham Karichappan² 

[1] Department of Food Technology, Kongu Engineering College, Perundurai Erode-638052, TN, India;Department of Food Technology, Kongu Engineering College, Perundurai Erode-638052, TN India

关键词: Mathematical model;    Box-Behnken design;    Stainless steel electrodes;    Grey wastewater;    Electrocoagulation;   

Others  :  810503
DOI  :  10.1186/2052-336X-12-29

 received in 2013-03-15, accepted in 2013-11-20,  发布年份 2014

【 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.

【 授权许可】

   
2014 Karichappan et al.; licensee BioMed Central Ltd.

【 图 表 】

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