NOVELTY - Producing (M1) a fermentation end product from at least two byproducts of biomass processing, involves: (A) collecting at least two byproducts from a host plant and directing them to a consolidated bioprocessing process (CBP process); (B) mixing the byproducts with a mesophilic microorganism, where the microorganism hydrolyzes and ferments lignocellulose or hemicellulose in the byproducts; and (C) fermenting the byproducts of biomass processing to allow the microorganism to produce the fermentation end product from the byproducts.    USE - For Producing a fermentation end product from byproducts of biomass e.g. plant matter, animal matter, municipal waste, corn, wheat, rice, barley, soybeans, bamboo, cotton, crambe, jute, sorghum, sawdust, wood pulp, paper pulp, or paper pulp waste streams; for producing sugars, an alcohol (preferably ethanol), and animal feed products (all claimed).    ADVANTAGE - The process provides animal feed product that is enriched in protein and is free of carbohydrates. The process provides animal feed production in a dry milling process from the byproducts at reduced cost.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) producing (M2) a fermentation end product from a fiber-rich stream, involving: (a) collecting a fiber-rich stream from a host plant operating on a fractionated feedstock, where the fractionated feedstock forms the fiber-rich stream, a germ-rich stream and a starch-rich stream, and directing the fiber-rich stream to a CBP process, (b) mixing the fiber-rich stream with the mesophilic microorganism, where the microorganism hydrolyzes and ferments lignocellulose or hemicelluloses in the fiber-rich stream, and (c) fermenting the fiber-rich stream to allow the microorganism to produce the fermentation end product from the fiber-rich stream;    (2) animal feed product produced by the methods (M1) or (M2);    (3) a system (S1) for the production of the fermentation end product from at least two byproducts of biomass processing comprising a CBP plant comprising: (i) at least two byproducts from a host plant that processes biomass; (ii) the mesophilic microorganism that hydrolyzes and ferments lignocellulose or hemicelluloses in the byproducts from the host plant that processes biomass; and (iii) a fermentation vessel;    (4) a system for the production of a fermentation end product from a fiber-rich stream, comprising a CBP plant that comprises: (i) a fiber storage system, (ii) a fiber-rich stream from a host plant that processes biomass, where the host plant is operating on a fractionated feedstock, where the fractionated feedstock forms the fiber-rich stream, a germ-rich stream and a starch-rich stream, (iii) a mesophilic microorganism that hydrolyzes and ferments lignocellulose or hemicelluloses in the fiber-rich stream, and (iv) a fermentation vessel;    (5) a composition for the production of a fermentation end product, comprising: thin stillage (TS), wet distillers grain (WDG), syrup, and a strain of the microorganism that can hydrolyze and ferment hemicelluloses or lignocellulose in TS, WDG, or syrup;    (6) producing an animal feed product enriched in grain-based protein free of carbohydrates involving: (i) collecting at least one byproduct from a host plant, (ii) mixing the byproduct with the mesophilic microorganism that can hydrolyze and ferment hemicelluloses or lignocellulose, (iii) producing ethanol from the byproducts, and (iv) concentrating leftover of the byproducts; and    (7) processing grain involving: (a) contacting grain to produce byproducts comprising whole stillage (WS), TS, WDG, and/or syrup, (b) directing the byproducts to a consolidated bioprocessing process, (c) contacting the directed byproducts with the mesophilic microorganism to hydrolyze and ferment hemicelluloses or lignocellulose, and (d) producing ethanol and animal feed product from the directed byproducts.