Journal
BIORESOURCE TECHNOLOGY
Volume 271, Issue -, Pages 439-448Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.09.133
Keywords
Extracellular electron transfer; Electrochemically active bacteria; Polarity reversal; Microbial electrochemical technology; Biocathode
Funding
- National Science Foundation of China [51478447, 51878175]
- Central Guidance on the Development of Local Science and Technology (Fujian) [2017L3003]
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The extracellular electron transfer (EET) between microorganisms and electrodes forms the basis for microbial electrochemical technology (MET), which recently have advanced as a flexible platform for applications in energy and environmental science. This review, for the first time, focuses on the electrode-biofilm capable of bidirectional EET, where the electrochemically active bacteria (EAB) can conduct both the outward EET (from EAB to electrodes) and the inward EET (from electrodes to EAB). Only few microorganisms are tested in pure culture with the capability of bidirectional EET, however, the mixed culture based bidirectional EET offers great prospects for biocathode enrichment, pollutant complete mineralization, biotemplated material development, pH stabilization, and bioelectronic device design. Future efforts are necessary to identify more EAB capable of the bidirectional EET, to balance the current density, to evaluate the effectiveness of polarity reversal for biocathode enrichment, and to boost the future research endeavors of such a novel function.
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