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A new strain of facultative anaerobe, Staphylococcus SJ-1, was isolated from a microbial fuel cell and shown to produce high power density and voltage in a double-chamber MFC.

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What they did

System
MFC

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Abstract

Microbial Fuel Cells (MFCs) are systems that can convert chemical energy into electrical energy by biological oxidation, current effort to improve the power output is limited by the lack of knowledge about the electrochemical activity bacteria and researches on the power generation mechanisms of pure strains are rare. In this study, the exoelectrogenic (”exo” for exocellular) bacterium staphylococcus SJ-1 was directly isolated from the MFC, which was stably run for 90 days. Cyclic Voltammetry (CV) indicated that temporary mediator produced by SJ-1 may take the work of transferring electron. A new built double-chamber MFC was inoculated with pure SJ-1, and after 40 days enrichment, the system produced 520mW/m 2 power density and the highest open circuit voltage (OCV) reached to 616mV, the power output was higher than most of the single-strain MFCs reported.

Key findings

  • The strain Staphylococcus SJ-1 produced 520mW/m² power density in a double-chamber MFC.
  • The highest open circuit voltage (OCV) reached 616mV in the double-chamber MFC.
  • The power output was higher than most single-strain MFCs reported.

Keywords

Microbial fuel cellStrain (injury)Cyclic voltammetryOpen-circuit voltageBacteriaElectrochemistry

Identifiers

DOI
10.4028/www.scientific.net/amr.347-353.2616
Journal
Advanced Materials Research
Year
2011