Patent ID: 7638068

Claim:
A method for producing electric power from concentrated grease trap pumpings which comprises: (a) heating said concentrated grease trap pumpings sufficiently to liquefy all contained grease, (b) separating the heated concentrated grease trap pumpings into; (1) a heavy stream comprising water and sediments, and (2) an oil-rich stream comprising oil, oil-water emulsion, and water, (c) heating said oil-rich stream sufficiently to evaporate contained water producing a grease fuel, (d) flowing said grease fuel to a grease fuel storage device, (e) flowing the stored grease fuel to an engine generator, (f) combusting the grease fuel in said engine generator whereby: (1) producing electric power, (2) heating a jacket water heat exchange fluid, and (3) producing a hot exhaust gas, and (g) placing the jacket water heat exchange fluid in a heat exchange relationship for the heating and liquefying of the concentrated grease trap pumpings.