A sandwiched denitrifying biocathode in a microbial fuel cell for electricity generation and waste minimization

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• 作者：A. Al-Mamun ; O. Lefebvre ; M. S. Baawain…
• 关键词：Autotrophic biofilms ; Biocathode ; Bioelectricity production ; Biological denitrification ; Microbial fuel cell ; Microbial electrochemistry
• 刊名：International Journal of Environmental Science and Technology
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：13
• 期：4
• 页码：1055-1064
• 全文大小：988 KB
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• 作者单位：A. Al-Mamun (1)
  O. Lefebvre (2)
  M. S. Baawain (1)
  H. Y. Ng (2)
  
  1. Department of Civil and Architectural Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khod, Muscat, 123, Sultanate of Oman
  2. Department of Civil and Environmental Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
  
• 刊物主题：Environment, general; Environmental Science and Engineering; Environmental Chemistry; Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution; Soil Science & Conservation; Ecotoxicology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1735-2630

文摘

A denitrifying biocathode in a microbial fuel cell was developed to investigate the replacement of the costly Pt-coated abiotic cathodes for electricity generation. The denitrifying biocathode was sandwiched between the dual-anode systems. The study investigated the performance for simultaneous treatment of wastewater on the anode, biological denitrification on the cathode and the potential recovery of electrical energy. Autotrophic biofilms performed denitrification on the cathode using supplied electrons by the biodegradation of organics on the anode. Graphite granules were used as electrodes for biofilm attachment, and nafion membranes were used as separators between electrodes. The system achieved a volumetric power of 7 ± 0.4 W m−3 net cathodic compartment (NCC) with the simultaneous removal of 229.5 ± 18 mg L−1 COD on anode and 88.9 g m−3 NCC day−1 nitrogen on cathode, respectively. The columbic efficiency for cathodic and anodic reactions was 98.9 ± 0.57 and 23.54 ± 0.87 %, respectively. This is a combined study for domestic wastewater treatment and biological denitrification in a compact MFC reactor. Further optimization of the system is desired to improve its performance and applicability.