pili as Nanowire for electricity production and Transfer through biofilm Compiler:Yashgin Hassanzadeh
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Use Geobacter and its pili as Nanowire for
electricity production and Transfer through biofilm
Compiler:Yashgin Hassanzadeh
Global energy concern for future uses guide
Scientist to keep searching for new andrenewable source of energy which
Could be used as not only asOption but also as main
Source of energy.
So let’s find the amazing one in the rest!
Introduction
Ability of microorganisms to oxidize organic compound to carbon dioxide with an electron serving shows promise for the conversion of complex substrate to electricity or biofuels in BESs
Microbial fuel cells (MFCs) are devices that exploit microorganisms as “biocatalysts” of generating electric power from organic matter
Analysis of the microbial community firmly attached to anodes harvesting electricity from a variety of sediments demonstrated that microorganisms in the family Geobacteraceae were highly enriched on anodes
Introduction
Geobacteraceae
Kingdom: BacteriaPhylum: ProteobacteriaClass:DeltaproteobacteriaOrder:DesulfuromonadalesFamily: GeobacteraceaeGenus: Geobacter
Rod-shaped with flagella, Gram-negative, some are motile but others are nonmotile , anaerobic bacteria that are useful in bioremediation, oxidize organic compound and metals (iron-radioactive metals-petroleum)
Direct contact between redox-active protein on the outer surfaces of the cells and the electron acceptor
Electron transfer via soluble electrons shuttling molecules
The conduction of electrons along pili or other filamentous structures
Mechanism for electron transfer
FIG1.example of microbial fuel cells producing electricity through different mechanisms of electron transfer to the anode.
Microbial electron production
Geobactteraceae(G.metallireducens, G.sulfureducens)
FIG2.simplified model for the conversion of complex organic fuels to electricity.
FIG3.generalized pathway for the anaerobic oxidation of organic matter to carbon dioxide. The process is mediated by a consortium of fermentative microorganisms and gobacter species.
FIG4.Model for Geobacter sulfurreducens electron transfer to the anode of microbial fuel cell from NADH derived from organic matter oxidation.
FIG5.Proposed mechanisms for electron transfer to the anode of microbial fuel cells.
FIG6.A mechanism for extracellular electron transfer by Geobacter sulfurreducens.
FIG7.Transmission electron micrographs of negatively stained G.sulfurreducens cells grown in medium with fumarate as electron acceptor.
FIG8.Transmission electron micrograph of negatively stained G.sulfurreducens grown in medium with Fe(III) as electron acceptor.
Power generation Education Biosensor Powering underwater monitoring devices
Applications
Lovley , D. R.(2008).The microbe electric:
conversion of organic matter to electricity. Elsevier Ltd 19:1-8.
Lovley , D. R.(2006).Bug juice: harvesting electricity with microorganisms. Nature Reviews 4:497-508.
References
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