One common measure of MFC efficiency, coulombic efficiency, is a measure of the number of
coulombs recovered as electrical current compared to the theoretical maximum number of coulombs
recoverable from the organic substrate added to the system. The coulombic efficiency of the MFC is
dependent, in part, on the microorganisms that are carrying out the oxidation and the organic carbon
from which the electrons are derived . This is due to the different metabolic pathways utilized
by different microorganisms and the mechanisms by which the microorganisms transfer electrons to
the anode.