Treatment of real municipal wastewater using aluminum electrode by electrocoagulation process: Experimental design and process performance

Articles in Press

Document Type : Research Article

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Department of Chemistry, Semnan University, Semnan, IRAN

Abstract

This study focuses on evaluating the electrocoagulation process as a method for the treatment of real municipal wastewater using aluminum plate electrode as anode in a batch electrochemical reactor. An attempt was made to model the chemical oxygen demand (COD) removal and electrical energy consumption (EEC) as a function of the critical operating variables for the determination of optimal conditions statistically. The initial pH, current, and reaction time were selected as key independent variables in a five-level central composite design (CCD); at the same time, COD removal efficiency and EEC were considered as the responses function. At the optimum conditions proposed by CCD(pH=6.2, I=0.025A, and T=46 min), a maximum COD removal efficiency of 85.7% with electrical energy consumption of 0.151 kW h/m3 was achieved. In addition, the operating costs, energy; and electrode consumptions at optimum conditions were calculated to be 0.1127079 $/m3, 0.151 kWh/m3; and 0.026 kg/m,3 respectively. These results presented here prove that the EC process has good performance and great potential for efficient treatment of real municipal wastewater.

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Iranian Journal of Chemistry and Chemical Engineering

Articles in Press, Accepted Manuscript
Available Online from 05 September 2023

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