Process for separating and recovering fat and proteinaceous material from raw organic material

A continuous low energy rendering process for separating fat from proteinaceous material in raw organic material containing fat, water and proteinaceous material to provide stabilized fat and stabilized protein products comprising;

• (a) pressing said raw organic material in a press having a perforated wall section permitting passage of fat and soft low density proteinaceous material to mechanically strip from said raw organic material in said press a major proportion of the fat and a large amount of the soft low density proteinaceous material from said raw organic material without subdividing said raw organic material to a size substantially smaller than required for feeding said raw organic material into said press and without applying heat to said raw organic material in order to liquify the fat therein and reduce significantly the moisture content of the raw organic material, and recovering said fat and said low density proteinaceous material along with small fragments of high density proteinaceous material in the form of a fatty aqueous fluid slurry while forming in said press a raw stripped residue comprised of essentially pressed wet low-fat high density proteinaceous material;
• (b) heating said slurry to a fat liquifying temperature between 125.degree. F. and 190.degree. F.;
• (c) separating from said slurry without adding water to said slurry a major proportion of the liquified fat along with extruded water containing dissolved proteinaceous solids as crude fatty material leaving essentially wet soft low-fat low density proteinaceous material containing small fragments of high density proteinaceous material;
• (d) heating said crude fatty material to effect sterilization of said fat and said dissolved proteinaceous solids and separating fat from said water and proteinaceous solids to provide a clean stabilized fat product;
• and
• (e) combining and drying said low-fat low density proteinaceous material from step (c) and said low-fat high density proteinaceous material from step (a) by heating at a sterilizing temperature to form a stable low-fat protein meal containing high density proteinaceous material.

A continuous low energy rendering process for separating fat from proteinaceous material in raw organic animal material containing fat, water and proteinaceous material to provide stabilized fat and stabilized protein products comprising;

• (a) pressing said raw organic animal material in a screw type stripping press having a perforated wall section which permits passage therethrough of fat and soft low density proteinaceous material to mechanically expel from said press a major proportion of the fat and a large amount of soft low density proteinaceous material contained in said raw organic animal material without subdividing all the raw organic animal material to a size substantially smaller than required for feeding said raw organic material into said press and without applying heat to said raw organic animal material in order to liquify the fat therein and reduce significantly the moisture content thereof, and recovering in the form of a fatty aqueous fluid slurry said fat and said soft low density proteinaceous material along with small fragments of high density proteinaceous material which pass through said perforated wall section while forming a raw stripped residue within said press comprised mainly of pressed low-fat high density proteinaceous material;
• (b) heating said slurry to a fat liquifying temperature of between 125.degree. F. and 190.degree. F.
• (c) mechanically separating from said slurry without adding water to said slurry a major proportion of the liquified fat as crude fat material in the form of a fatty liquid containing extruded moisture having dissolved protein solids therein and recovering a residue formed essentially of wet soft low-fat low density proteinaceous material;
• (d) heating said crude fat material to effect sterilization of said fat and protein solids and separating said fat from said water and said protein solids to provide a clean stabilized fat product;
• and
• (e) combining and drying said low-fat low density proteinaceous material from step (c) and said low-fat high density proteinaceous material from step (a) at a sterilizing temperature to form a stabilized low-fat protein meal containing high density proteinaceous material.