Biological anodic oxidation and cathodic reduction reactions for improved bioelectrochemical treatment of petroleum refinery wastewater
Author | Mohanakrishna G. |
Author | Abu-Reesh I.M. |
Author | Al-Raoush R.I. |
Available date | 2020-03-18T08:10:10Z |
Publication Date | 2018 |
Publication Name | Journal of Cleaner Production |
Resource | Scopus |
ISSN | 9596526 |
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?1000 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 278 mA/m2 and a power density of 222 mW/m2 using applied potential of 800 mV. This system also achieved COD degradation rate of 0.364 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. ? 2018 Elsevier Ltd |
Sponsor | This publication was made possible by NPRP grant # 6-289-2-125 from the Qatar national research fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. The Authors would like to acknowledge the Environmental Science Centre (ESC) , Qatar University for the support in evaluating the samples for diesel range organics (DROs). |
Language | en |
Publisher | Elsevier Ltd |
Subject | Bioanode Biocathode Graphite based BES Hybrid bioelectrochemical system Petroleum refinery wastewater Synergistic bioelectrochemical treatment |
Type | Article |
Pagination | 44 - 52 |
Volume Number | 190 |
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Chemical Engineering [1141 items ]