Production of electricity increases linearly with COD in the range 500–5,000 ppm.
Carboxylic acids are more efficient fuels for the production of electricity than alcohols.
Fructose behaves as a very low-efficient fuel for MFC.
Maximum power density attainable in the range 20–500 mW m−2 depending on the composition of fuel.
Propionic acid are slightly more efficient than acetic acid as fuel.