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Study on removal of COD from some industrial liquid waste by electrocoagulation technique

In this study, the removal of vegetable oil from wastewater by electrocoagulation (EC) using aluminium electrodes in a batch reactor was investigated. The effect of operating parameters such as current density, electrolyte (NaCl) concentration, pH and initial oil concentration were studied, while chemical oxygen demand (COD) was calculated as an indication. The results illustrated that by increasing the current density the percentage removal of COD increased. The increase in the NaCl concentration increased the COD removal efficiency. The optimum pH for EC was found to be 7. And finally, the COD removal efficiency decreased as the initial oil concentration was increased from 10 – 80 ppm.

Author(s): Amira Abou-Taleb, Ehssan Nassef and Mohamed Hussein

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