Methods for improving the nutritional quality of residues of the fuel, beverage alcohol, food and feed industries

A method for producing an animal feed and an enzyme-based animal feed supplement from a fibrous by-product or residue of a food manufacturing process, comprising:

• inoculating the fibrous by-product or residue with at least one filamentous fungus;
• fermenting the fibrous by-product or residue whereby a dry matter content of the by-product or residue decreases, a protein content of the by-product or residue increases, and a fat content of the by-product or residue decreases;
• separating at least one enzyme from the fermented fibrous by-product or residue;
• and
• providing the fermented fibrous by-product or residue and optionally the separated enzyme to an animal as a feed or feed supplement.

A method for improving body weight gain rate of a growing animal, comprising feeding a nutritionally effective amount of an enzyme-based animal feed supplement formulated by the steps of:

• inoculating a fibrous byproduct or residue of a food manufacturing process with at least one filamentous fungus;
• fermenting the fibrous byproduct or residue whereby a dry matter content of the byproduct or residue decreases, a protein content of the byproduct or residue increases, and a fat content of the byproduct or residue decreases;
• separating at least one enzyme from the fermented fibrous byproduct or residue;
• dewatering the separated enzyme;
• and
• providing the dewatered enzyme to an animal in a formulation including a suitable carrier.