期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 40, 页码 23106-23116出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta06533e
关键词
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资金
- Science and Engineering Research Board
- Ministry of Human Resource Development, Delhi, India [SERB-IMPRINT/2018/000252]
- Department of Science and Technology, Delhi, India [DST/INSPIRE/04/2015/001869, GAP-094]
The study presents a uniquely designed conical MFC that is capable of treating wastewater in continuous mode while simultaneously generating high bioelectricity.
Microbial fuel cells (MFCs) are considered to be an efficient green technology for treating wastewater effluents. The integration of MFCs with an effluent treatment plant can reduce the operational cost and boost up bioelectricity generation. In the current study, a unique conical configuration of a membraneless single-chamber MFC is proposed for use in continuous mode. The MFC is based on cerium oxide (CeO2) sprinkled carbon nanofibers (CNFs) grown over activated carbon fabric (ACF) as the air cathode and activated carbon beads (ACBs) as the anode. The anode material (CeO2-CNF/ACBs) packed in a conical chamber facilitates a uniform upflow of water and a dense growth of a biofilm. The air-side of the cathode material (CeO2-CNF/ACF) is coated with polydimethylsiloxane, whereas the anolyte side is coated with a laboratory-synthesized crosslinked copolymer to facilitate the permeation of atmospheric oxygen and proton exchange, respectively. The MFC operated at a hydraulic residence time of similar to 51 min shows a chemical oxygen demand removal efficiency of 76.0 +/- 2.0%, generating an open-circuit potential, maximum power density and limiting current density of 0.34 V, 426 mW m(-3), and 4700 mA m(-3), respectively. The data indicate that the specially designed MFC with its distinctly configured (disk and beads) electrodes in this study is scalable to treat wastewater in continuous mode and also capable of simultaneously generating high bioelectricity.
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