Abstract: Methods and apparatus for producing a particulate proteinaceous product are disclosed. Raw animal matter comminuted. Hydrolysing enzymes are added to preheated food-grade oil and added to the ground matter. The resulting suspension is preheated to hydrolysis temperature. Controlled hydrolysis of proteins in the suspension achieves a predetermined partial hydrolysis of the proteins to form a hydrolysate/oil suspension. At the desired level of hydrolysis the enzymes are heat-inactivated. Non-digestible solids are removed from the suspension and the suspension is pasteurized and partially dehydrated to concentrate the hydrolysate. Some of the oil is removed to form the product. The method and apparatus exhibit substantial resistance to equipment clogging.

Abstract: Methods and apparatus for producing a particulate proteinaceous product are disclosed. Raw animal matter comminuted. Hydrolysing enzymes are added to preheated food-grade oil and added to the ground matter. The resulting suspension is preheated to hydrolysis temperature. Controlled hydrolysis of proteins in the suspension achieves a predetermined partial hydrolysis of the proteins to form a hydrolysate/oil suspension. At the desired level of hydrolysis the enzymes are heat-inactivated. Non-digestible solids are removed from the suspension and the suspension is pasteurized and partially dehydrated to concentrate the hydrolysate. Some of the oil is removed to form the product. The method and apparatus exhibit substantial resistance to equipment clogging.

Abstract: A particulate proteinaceous product and methods for producing the same from waste raw animal parts are disclosed. The product is dry to the touch, is compressible into pellets or cakes, and comprises about 45 to 65 w/w percent partially hydrolyzed, non-denatured animal protein, about 20-35 w/w percent oil derived from the animal parts, about 10-15 w/w percent moisture, and about 0-7 w/w percent ash. The product also has less objectionable odor, less propensity to oxidize, and higher nutritional value than existing products. The method involves mulling raw animal parts, hydrolyzing proteins in the animal parts with enzymes, heating to inactivate enzymes, screening, concentrating and adding oil, pasteurizing, removing water, separating oil and routing a portion of the separated oil to the beginning of concentrating as oil added. The method is distinctive in that it produces a dry, flaky product without the use of a conventional dryer.

Abstract: A particulate proteinaceous product and methods for producing the same from waste raw animal parts are disclosed. The product is dry to the touch, is compressible into pellets or cakes, and comprises about 45 to 65 w/w percent partially hydrolyzed, non-denatured animal protein, about 20-35 w/w percent oil derived from the animal parts, about 10-15 w/w percent moisture, and about 0-7 w/w percent ash. The product also has less objectionable odor, less propensity to oxidize, and higher nutritional value than existing products.

Abstract: A particulate proteinaceous product is prepared from waste raw protein-containing animal parts with a method and an apparatus having a mulling stage wherein the raw animal parts are reduced to a ground condition; a hydrolyzing stage wherein proteins in the ground animal parts are hydrolyzed to a predetermined extent to form an aqueous suspension, using either endogenous or supplementary proteolytic enzymes, and subsequently heated to inactivate the enzymes and convert fats in the suspension to oils; a screening stage wherein non-digestible solids are removed from the suspension; a concentration stage wherein extraneous oil is added to the suspension, the suspension is pasteurized, and a large portion of the water is removed therefrom; and an oil-separation stage wherein sufficient oil is removed to form the product.