期刊
JOURNAL OF CLEANER PRODUCTION
卷 190, 期 -, 页码 44-52出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2018.04.141
关键词
Hybrid bioelectrochemical system; Petroleum refinery wastewater; Graphite based BES; Bioanode; Biocathode; Synergistic bioelectrochemical treatment
资金
- Qatar national research fund (a member of Qatar Foundation) [6-289-2-125]
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 mAim2 and a power density of 222 mW/m(2) using applied potential of 800 mV. This system also achieved COD degradation rate of 0.364 kg COD/m(3)-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. (C) 2018 Elsevier Ltd. All rights reserved.
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