Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8094868 | Journal of Cleaner Production | 2018 | 39 Pages |
Abstract
Bioelectrochemical systems (BESs) were evaluated for the bioelectrochemical treatment (BET) of petroleum refinery wastewater (PRW) by applying mild electrochemical potential in the range of 400-1000â¯mV on a single chamber membrane-less BES configured with anodic and cathodic biofilms. After four days of cycle operation in batch mode, BES achieved a maximum current density of 278â¯mA/m2 and a power density of 222â¯mW/m2 using applied potential of 800â¯mV. This system also achieved COD degradation rate of 0.364â¯kg COD/m3-day. Diesel range organics (DROs) exhibited more than 90% degradation, which is 15 times higher than the abiotic control. Electrochemically active bioanode and biocathode contributed to the degradation of PRW through both oxidation and reduction reactions with mild applied potentials. This also resulted in a 30% improvement in COD removal compared to MFC with biocatalyst only on the anode. The function of improved bioelectrochemical treatment was also exhibited by redox current values of cyclic voltammograms.
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Authors
Gunda Mohanakrishna, Ibrahim M. Abu-Reesh, Riyadh I. Al-Raoush,