there is disclosed a fuel cell having an anode and cathode and using either glycerol or biodiesel process waste as a fuel source to generate power and oxidize glycerol to oxidized fragments and carbon dioxide . more particularly , there is disclosed a liquid fuel cell incorporating a membrane - electrode assembly wherein the electrocatalysts are embedded in or adjacent a polymeric conducting membrane with which they form the fuel cell body and glycerol or biodiesel process waste is oxidized to form the power source .