Glycerol degradation in single-chamber microbial fuel cells.
Glycerol degradation with electricity production by a pure culture of Bacillus subtilis in a single-chamber air cathode of microbial fuel cell (MFC) has been demonstrated. Steady state polarization curves indicated a maximum power density of 0.06 mW/cm(2) with an optimal external resistance of 390Ω. Analysis of the effect of pH on MFC performance demonstrated that electricity generation was sustained over a long period of time under neutral to alkaline conditions. Cyclic voltammetry exhibited the increasing electrochemical activity with the increase of pH of 7, 8 and 9. Voltammetric studies also demonstrated that a two-electron transfer mechanism was occurring in the reactor. The low Coulombic efficiency of 23.08% could be attributed to the loss of electrons for various activities other than electricity generation. This study describes an application of glycerol that could contribute to transformation of the biodiesel industry to a more environmentally friendly microbial fuel cell-based technology.
Department of Life Science, National Chung Cheng University, Minhsiung, Chiayi, Taiwan.
Vanita Roshan
VR
Nimje
Chien-Yen
CY
Chen
Chien-Cheng
CC
Chen
Hau-Ren
HR
Chen
Min-Jen
MJ
Tseng
Jiin-Shuh
JS
Jean
Young-Fo
YF
Chang
D001412:Bacillus subtilis / Q000502:physiology*; D001673:Biodegradation, Environmental; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D003246:Conservation of Energy Resources; D004566:Electrodes / Q000382:microbiology*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005990:Glycerol / Q000378:metabolism*
D005990:Glycerol