Biotechnology and Bioprocess Engineering

, Volume 20, Issue 5, pp 894–900

Flavin mononucleotide mediated microbial fuel cell in the presence of Shewanella putrefaciens CN32 and iron-bearing mineral

  • Yoonhwa Lee
  • Sungjun Bae
  • ChungMan Moon
  • Woojin Lee
Research Paper

DOI: 10.1007/s12257-015-0031-2

Cite this article as:
Lee, Y., Bae, S., Moon, C. et al. Biotechnol Bioproc E (2015) 20: 894. doi:10.1007/s12257-015-0031-2

Abstract

We investigate the workability of electron transfer mediators (ETMs) for the enhanced microbial fuel cell (MFC) operated by Shewanella putrefaciens CN32. In open-circuit, natural ETMs showed 128 ~ 166% of enhancement in the difference of electrical potential compared to that without ETMs (0.41 V), while MFC with synthetic ETMs achieved 200 ~ 250% of enhancement, showing a liner relationship between the electric potentials and ETMs’ redox potentials (R2 = 0.91). Especially, flavin mononucleotide (FMN), the most effective ETM for Shewanella-MFC operation, exhibited the highest potential (0.547 V) and power density (20.28 mW/m2) and generated the maximum current (0.285 mA). The addition of conductive iron-bearing minerals (hematite: 26.27 mW/m2, lepidocrocite: 25.83 mW/m2) enhanced power density of FMN-MFC, while no significant enhancement was observed when soluble iron source (ferric citrate) was added. In addition, MFC containing hematite showed the maximum current (0.37 mA) with 30.8 % of coulombic efficiency.

Keywords

microbial fuel cell Shewanella putrefaciens CN32 electron transfer mediator iron-bearing minerals flavin mononucleotide 

Copyright information

© The Korean Society for Biotechnology and Bioengineering and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Yoonhwa Lee
    • 1
  • Sungjun Bae
    • 2
  • ChungMan Moon
    • 3
  • Woojin Lee
    • 1
  1. 1.Department of Civil and Environmental EngineeringKorea Advanced Institute of Science and TechnologyDaejeonKorea
  2. 2.Institute for Nuclear Waste DisposalKarlsruhe Institute of TechnologyKarlsruheGermany
  3. 3.Biomass and Waste Energy LaboratoryKorea Institute of Energy ResearchDaejeonKorea

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