Real wastewater Treatment by Electrocoagulation- Electro-oxidation Combined System: Optimization using Taguchi Approach | ||||
| Egyptian Journal of Chemistry | ||||
| Article 12, Volume 65, Issue 3, March 2022, Page 135-145 PDF (1 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2021.88245.4247 | ||||
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| Authors | ||||
Hind M. Ibrahim; Rasha H. Salman  
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| Department of Chemical Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq | ||||
| Abstract | ||||
| In this study, the optimum conditions for COD removal from petroleum refinery wastewater by using a combined electrocoagulation- electro-oxidation system were attained by Taguchi method. An orthogonal array experimental design (L18) which is of four controllable parameters including NaCl concentration, C.D. (current density), PH, and time (time of electrolysis) was employed. Chemical oxygen demand (COD) removal percentage was considered as the quality characteristics to be enhanced. Also, the value of turbidity and TDS (total dissolved solid) were estimated. The optimum levels of the studied parameters were determined precisely by implementing S/N analysis and analysis of variance (ANOVA). The optimum conditions were found to be NaCl = 2.5 g/l, C.D. =20 mA/cm2, time = 40 min, and pH= 7. Under these optimum conditions, COD removal percentage, turbidity and TDS reach to 90%, 99% and 2.55g/l respectively. | ||||
| Keywords | ||||
| electrocoagulation; electro-oxidation; combined; petroleum refinery wastewater; Taguchi design | ||||
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