Abstract: A process and system for recovering protein and lipid from food animal byproducts, and the products thereof, involves homogenizing animal byproducts with water to form a homogenate, solubilizing the homogenate by adjusting the pH of the homogenate to form a first pH adjusted composition, separating the first pH adjusted composition forming a light fraction containing lipids (oil), a medium fraction containing protein in solution, and a heavy fraction containing fat-free impurities, separation by first centrifugation, adjusting the pH of the medium fraction to about the isoelectric point of the proteins thereby precipitating the medium fraction forming a second pH adjusted composition, and separating the second pH adjusted composition forming a light fraction containing water and a heavy fraction containing precipitated proteins. The water may then be recycled and used in the homogenization of further byproducts.

Abstract: The present invention provides for an industrial scale bioreactor and for a use of the industrial scale bioreactor in a continuous protein and lipid recovery system. The industrial scale bioreactor comprises a pH-resistant container able to hold at least 150 gallons wherein said pH-resistant container further comprises, a means to add influent to said pH-resistant container, a means to remove effluent from said pH-resistant container, one or move thermocouples able to measure the temperature within the pH-resistant container, a mixer reversibly attached within said pH-resistant container, and a means to monitor and control the pH within said pH-resistant container.