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A Developed Low-Cost Electrocoagulation Process for Efficient Phosphate and COD Removals from Real Urban Wastewater

6. M. Elazzouzi, K. Haboubi, M.S. Elyoubi and A. El Kasmi, A Developed Low-Cost Electrocoagulation Process for Efficient Phosphate and COD Removals from Real Urban Wastewater, ES Energy Environ., 2019, 5, 66-74.

PDF online:esee8c302.pdf

Abstract: The treatment of urban wastewater is nowadays one of the topics taking many interests from the scientific community. This study focuses on simultaneous removal of phosphate (P) and chemical oxygen demand (COD) from real urban wastewater using developed electrocoagulation (EC) system. A comparative study of developed EC process (anode iron scrap) with a conventional EC process (anode iron plate) was performed. When developed EC process was used, the results revealed that the removals efficiencies of P and COD have been improved from 82% to 94% for COD and from 85 % up to 97% for P, thus led to reduce energy consumption from 7.6x10-3 to 5.4x10-3 kWh/g COD and from 5.8x10-1 to 4.3x10-1 kWh/g P. The higher treatment efficiency obtained from the developed EC process can be directly attributed to the higher effective surface area of the Fe scrap. Moreover, the characterization of generated EC by-products revealed the existence of P, C and O confirming that such pollutants were adsorbed on the surface of iron hydroxides and oxyhydroxides, where the removals of P and COD were taken place. The obtained findings could contribute to improving the EC treatment of real urban wastewater and make the treatment simple and economically feasible.

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