Patent ID: 7670633

Claim:
A method of generating a fiber-reduced fraction and a fiber-enriched fraction from a distillers dried grains (DDG) or distillers dried grains with solubles (DDGS) material, comprising: a) processing corn to produce said DDG or DDGS material; b) separating by size said DDG or DDGS material into a first fraction and a second fraction, wherein said first fraction has a larger particle size and said second fraction has a smaller particle size; c) collecting said second fraction; d) air classifying said first fraction so as to yield a first subfraction of a lighter material enriched in fiber relative to said first fraction and a second subfraction of a heavier material reduced in fiber relative to said first fraction; and e) collecting said second subfraction, wherein said second subfraction is reduced in fiber relative to said DDG or DDGS material; thereby generating the fiber-reduced fraction and the fiber-enriched fraction.