Bacteria is very useful in generating electricity by using
devices known as microbial fuel cells(mfc).The device has an anode and cathode
which are connected and during the breathing process of bacteria they release
electrons as a part of metabolism on to
the anode. These electrons when directed towards a closed path constitute an
electric current.
These MFC’s has
to be filled with mud,sewage,waste and we should wait for the growth of bacteria.
These bacteria will not use any intermediate in transferring the electrons to
the anode. In turn they touch the anode .For this they are having filaments
which directly transfer electrons .such filaments are called nanowires.When
billions of bacteria combine they form conductive biofilms which transfer the electrons.
These MFC’s find good scope in bioremediation where microorganisms are used to
remove pollutants. These MFC’s can be run in reverse for producing organic
compounds and this is called microbial electro synthesis.
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