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:: Volume 4, Issue 1 (Winter, 2017) ::
Environ. Health Eng. Manag. 2017, 4(1): 37-43 Back to browse issues page
Optimizing electrocoagulation and electro-Fenton process for treating car wash wastewater
Seyyedali Mirshahghassemi , Behnoush Aminzadeh , Ali Torabian , Kamelia Afshinnia
Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Iran , bamin@ut.ac.ir
Abstract:   (13069 Views)

Background: Car wash wastewater contains several contaminants such as organic matter, oil, grease, detergents and phosphates, all of which are harmful for the environment. In this study, the application of electrocoagulation (EC) to treat car wash wastewater has been studied, and the operating parameters optimized. The electro-Fenton (EF) for further contaminant removal was also investigated.
Methods: In EC process, the effect of pH, current density, and the reaction time of the removal efficiency of chemical oxygen demand (COD), phosphate, and turbidity were investigated using the response surface methodology (RSM). The electrochemical cell consisted of four iron electrodes that were connected to a power supply using a monopolar arrangement. In the EF process, the effect of pH, reaction time, and hydrogen peroxide concentration on COD removal efficiency were probed.
Results: The optimum pH, current density, and the reaction time for the EC process were 7.3, 4.2 mA cm-2 and 20.3 minutes, respectively. Under these conditions, the COD, phosphate, and turbidity removal percentages were 80.8%, 94.9% and 85.5%, respectively, and the specific energy consumption was 1.5 kWh m-3. For the EF process, the optimum pH, reaction time, current and hydrogen peroxide dosage were 3, 10 minutes, 2 A and 500 mg L-1, respectively. The EF showed higher COD removal efficiency (85.6%) with a lower specific energy consumption (0.5 kWh m-3) and reaction time compared to the EC.
Conclusion: This study shows that both EC and EF can effectively treat car wash wastewater with high removal efficiency within a short reaction time.

Keywords: Electrocoagulation (EC), Electro-Fenton (EF), Response surface methodology (RSM), Car wash waste water
eprint link: http://eprints.kmu.ac.ir/id/eprint/26176
Full-Text [PDF 863 kb]   (3831 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2017/02/28 | Accepted: 2017/02/28 | Published: 2017/02/28
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Mirshahghassemi S, Aminzadeh B, Torabian A, Afshinnia K. Optimizing electrocoagulation and electro-Fenton process for treating car wash wastewater. Environ. Health Eng. Manag. 2017; 4 (1) :37-43
URL: http://ehemj.com/article-1-234-en.html

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Volume 4, Issue 1 (Winter, 2017) Back to browse issues page
Environmental Health Engineering And Management Journal Environmental Health Engineering And Management Journal
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