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Submitted on 6 Nov 2018
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[Poster Presentation]-Microbial Fuel Cell
Mebrahtom Gebresemati To cite this version:
Microbial Fuel Cell for Simultaneous Energy Generation and Waste Treatment
Mebrahtom Gebresemati
Department of Chemical Engineering, Ethiopian Institute of Technology-Mekelle, Mekelle University, Mekelle, Tigray, Ethiopia
Corresponding author: E-mail: [email protected]; Mobile: +251-98-850-1979
1st Tigray Grand Conference (TGC) , Jul 18-22, 2018 at Martyrs Hall, Mekelle, Tigray, Ethiopia
RESULTS AND DISCUSSION
Microbial fuel cells (MFCs) are devices that drive current by employing electrogenic bacteria from biodegradable organic materials. These emerging technologies directly convert chemical energy, derived through microbial metabolism, to electrical energy, which has great potential applications such as in domestic and breweries wastewater treatments, hydrogen production, desalination plants, pollution remediation, remote power source, and remote sensing. Widespread use of MFCs in wastewater treatments can convert organic wastes into electricity while simultaneously treating the waste materials.
ABSTRACT
INTRODUCTION
METHODOLOGY
CONCLUSION AND RECOMMENDATIONS
Recommendations
The Ethiopian Energy Agency (EEA), should consider and add MFCs into the country's energy mix, and studies have to be conducted in different corners of the country to evaluate the feasibility of the implementation of MFCs, along with treating wastewaters.
Fig. 3:
MFC model
An MFC is one type of bioelectrochemical systems (BESs) that harness the power of electrogenic bacteria and convert energy released in metabolic reactions into electrical energy.
Like other fuel cells (FCs), MFC consist of an anode, a cathode and a membrane separator.
Bacteria present at the anode (biofilm) reduce an organic substrate from various feedstocks including solid biomasses, and wastewaters.
Under anaerobic conditions, the bacteria in the anode degrade the organic matter (the fuel) producing protons, electrons and CO2.
Then the bacteria transfer the electrons to the anode electrode and the electrons pass through an external circuit producing a current.
MFC characterization is specified in terms of cell voltage (Ecell), current density (j), power (P), coulombic efficiency (CE), and COD removal.
MFC can be modeled as an ideal voltage source, in series with an ideal resistor (Rint), producing its electromotive force, Eemf.
Typical MFC experimental setup include: Electrochemical station
Cell (Single or double chamber) Membrane (optional)
Fig. 2: MFC experimental setup
Fig. 4:
Characte-rization of MFC
Fig. 6: An overview of MFC applications
An interesting and
promising technology Multiple applications
from wastes
Sustainable and clean
Fig. 5: Literatures on BESs (Scopus, Mar 2018)
Conclusions
MFC polarization curve yields the overall cell performance under specific operating conditions.
The power generated by a MFC is quantified in terms of power output, P = Vcell (V) × I (A).
The open circuit voltage (OCV) is the voltage of a MFC under a no–load condition and can be measured with a high
