Effect of Electro-Oil Acclimation of an Indigenous Strain on the Performance of Sediment Microbial Fuel Cells (SMFC)

Yao Pan, Shanfa Tang (), Wen Ren, Yuanpeng Cheng, Jie Gao, Chunfeng Huang and Ke Fu
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Yao Pan: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Shanfa Tang: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Wen Ren: State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety & Environment Technology, Beijing 102206, China
Yuanpeng Cheng: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Jie Gao: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China
Chunfeng Huang: Shengli Oilfield Petroleum Development Center Co., Ltd., Dongying 257100, China
Ke Fu: School of Petroleum Engineering, Yangtze University, Wuhan 430100, China

Energies, 2023, vol. 16, issue 14, 1-16

Abstract: Sediment microbial fuel cell (SMFC) is a type of MFC without a proton exchange membrane. However, SMFC have had problems with low-power production performance. In this paper, the effects of native bacteria (K1) in oily sludge and their electro-oil-induced domestication on the power generation and oil removal performance of SMFC were studied. The results showed that K1 belonged to Ochrobactrum intermedium . During the domestication process, an upward trend was shown in the OD600 and ORP values in the culture medium, and it grown best at 0.7 V. Ochrobactrum intermedium K1 significantly increased the average output voltage, electromotive force, and maximum power density of SMFC and reduced the apparent internal resistance of the battery. The maximum power density was 169.43 mW/m 3 , which was 8.59 times higher than that of the control group. Ochrobactrum intermedium K1 improved the degradation of crude oil by SMFC. Ochrobactrum intermedium K1 enhanced the degradation of high-carbon alkanes and even-carbon alkanes in n-alkanes. Cyclic voltammetry and chronoamperometry tests showed that after acclimation, Ochrobactrum intermedium K1 improved the extracellular electron transfer efficiency (EET) mediated by c-Cyts and flavin by increasing the surface protein redox potential.

Keywords: oily sludge; sediment microbial fuel cell; indigenous bacteria; electric-oil-induced domestication; extracellular electron transfer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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