Bioelectricity generation in biological fuel cell with and without mediators

Nader Mokhtana, Wan Ramli Wan Daud, Mostafa Rahimnejad, Ghasem D. Najafpouv

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

As fossil fuel sources are depleted, alternative energy sources are rapidly developing. Renewable energy is much eco-friendly such as biomass whch is converted to fuel and energy in many alternative processes. For an alternative energy futuristic, the trends for new alternative renewable energies are gradually increasing. Major efforts were devoted to develop alternative electricity generation processes. Among renewable alternatives, enzymatic fuel cells, microbial fuel cell W C) and biological fuel cell (BFC) have created great interests for many researchers due to its possibility of drectly harvesting electricity from organic wastes and renewable biomass or other reliable sources. MFC operates under vely mild conditiom and in wide variable ranges of biodegradable materials used as fuel. The bio-based materials can be oxidzed by microorganisms in anode and the biocatalysts have great potential to generate electrons. Biological systems possess number of advantages over the conventional chemical processes. Microbial fuel cell as the newest type of chemical fuel cells is a bioreactor that can generate electricity from what would be considered as organic wastes by means of microorganisms as biocatalysts. In h s approach bioelectricity generation and simultaneous waste treatment may take place in a cell. Therefore, the yield of newly developed system is much higher than any conventional processes. In other hand, direct electron tramfers from anaerobic anode chamber to anode surface had shown to take place only at vely low efficiency. In MFCs, dfferent substrates and biocatalysts to generate electricity are employed. In h s research, Saccharomyces cerevisiae (PTCC 5269) was selected for the generation of bioelectricity in a two chamber MFC. Nafion 117 was selected as protom exchange membranes to transfer the generated protons from the anode chamber to the cathode compartment at ambient temperature and pressure. The initial glucose concentration was 30g.l -1. Thionine and neutral red (NR) at several concentratiom (50 to 600 μmol.1 -1) were utilized as electron shuttle in the anode chamber. Operational performance of the MFC was evaluated with focus on electricity generation. At 200 μmol.1 -1 neutral red concentration, the maximum obtained voltage, cunent and power demity were 510 mV, 1675 mA.m -2 and 186 mWm -2, respectively. The outer surface of graphte electrode at the end of process was also analyzed by scanning electron microscopy with magnification of 5000. The obtained image demonstrated that microorganisms were uniformly grown on the graphte surface which was accounted for the system high electrical performance.

Original languageEnglish
Pages (from-to)559-567
Number of pages9
JournalWorld Applied Sciences Journal
Volume18
Issue number4
DOIs
Publication statusPublished - 2012

Fingerprint

Bioelectric phenomena
Biological fuel cells
Anodes
Electricity
Biocatalysts
Microorganisms
Microbial fuel cells
Electrons
Enzymatic fuel cells
Biomass
Waste treatment
Biological systems
Bioreactors
Fossil fuels
Yeast
Glucose
Fuel cells
Ion exchange
Protons
Cathodes

Keywords

  • Bioelectricity
  • Cunent density
  • Microbial fuel cell
  • Neutral red
  • Thonine

ASJC Scopus subject areas

  • General

Cite this

Bioelectricity generation in biological fuel cell with and without mediators. / Mokhtana, Nader; Wan Daud, Wan Ramli; Rahimnejad, Mostafa; Najafpouv, Ghasem D.

In: World Applied Sciences Journal, Vol. 18, No. 4, 2012, p. 559-567.

Research output: Contribution to journalArticle

Mokhtana, Nader ; Wan Daud, Wan Ramli ; Rahimnejad, Mostafa ; Najafpouv, Ghasem D. / Bioelectricity generation in biological fuel cell with and without mediators. In: World Applied Sciences Journal. 2012 ; Vol. 18, No. 4. pp. 559-567.
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