NOVELTY - Method for using a liquid fuel composition obtained from biodiesel waste as the fuel in a fuel cell having an anion exchange membrane, where the liquid fuel composition comprises (%) glycerin (5-80), hydroxyl ion (1-20), methanol (0.5-10) and impurities (1-40) selected from trace methyl or ethyl esters, ethanol, ethylene glycol, propanol, soaps, and/or incomplete transesterification of triglycerides.    USE - As fuel in a fuel cell (claimed) to generate power and oxidize the glycerin waste into various oxidation products.    ADVANTAGE - The method and fuel cell design, utilizes biodiesel waste having polyhydric alcohol mixture as a fuel source to generate power and oxidize the glycerin waste into various oxidation products. Thus the fuel cell shows higher performance than a direct methanol fuel cell (DMFC) and other currently reported direct oxidation fuel cells. The fuel cell has stack configuration which avoids electrical short circuiting, e.g. a series of pumps, valves, junctions, and/or check valves enable transfer and/or isolation of each individual fuel cell. The ability to use polyhydric fuels that contain high amounts of water advantageously reduces costs for this process over other uses for glycerin.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a fuel cell device for oxidizing a biodiesel processing waste comprising a chamber having a first and second sealed outer walls forming an inner chamber with three compartments; an oxygen compartment formed by the first outer wall of the chamber and a cathode polymeric strand electro-catalyst assembly; a biodiesel waste compartment formed by the second outer wall of the chamber and an a anode polymeric strand electro-catalyst assembly; and an electrolyte compartment formed by the cathode polymeric strand electro-catalyst assembly and the anode polymeric strand electro-catalyst assembly, where the electrolyte compartment comprises a base solution; and    (2) a liquid fuel cell that utilizes glycerol or biodiesel waste as a fuel, comprising either an anode chamber having sealed endplate (2), anion exchange membrane with two sides and glycerol/biodiesel processing waste fuel, where the endplate and the first side of the anion exchange membrane form the anode chamber, and a oxygen chamber having a second sealed endplate, the second side of the anion exchange membrane, cathode polymeric strand electro-catalyst assembly, and oxygen source; or an anode chamber having a sealed endplate, glycerol or biodiesel waste fuel, anode membrane electrode assembly (7) and proton exchange membrane with two sides, where the endplate and the first side of the proton exchange membrane form the anode chamber, and a oxygen chamber formed by a second sealed endplate and the second side of the proton exchange membrane, cathode polymeric strand electro-catalyst assembly (cathode MEA) and oxygen source.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of fuel cell.    Anode plate (2)    Fuel reservoir (4)    Current collectors (5, 8)    Membrane-electrode assembly (7)    Cathode plate (9)