Tag Archives: Microbial Fuel Cell

Electricity from ordinary sewage waste: Microbial Fuel Factory Cells

microbial fuel cell

Barbados should give MFC’s a look!

by Robert D. Lucas, Ph.D.
Food biotechnologist.

Recently there has been much talk about the diverse means available of obtaining energy from renewable sources (solar, wave, wind as-well-as bio-diesel/gas). However, no mention has been made locally of the use of microbial fuel/factory cells (MFC’s). MFC’s are devices that convert chemical energy into electrical energy as do batteries, via the use of micro-organisms.

Unlike batteries, MFC’s can sustain their output of electricity as long as the chemical input is maintained. Most bacteria are electrochemically inactive and cannot be used in MFC’s. Those bacteria which are capable of producing an electric current are called exoelectrogens. Exoelectrogens, when placed into a suitable medium, transfer electrons (negatively charged particles) to an electrode which has been inserted into the medium. This flow of electrons is facilitated by an active electron transport system, which carries electrons directly from the microbe’s respiratory system to the anode ((negatively charged electrode).

“MFC’s do not depend on sunlight to be able to function. There is no need to have storage facilities for storing electricity as is the case with solar energy.”

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