Patent ID: 8642303
Filing Date: 2014-02-04
Classification: C12P,Y02E

Abstract:
1. A process for the production of cellulosic ethanol from lignocellulosic biomass, comprising the steps of: Pretreating the lignocellulosic biomass to decompose the lignocellulosic biomass into fibrous solids; Hydrolyzing the fibrous solids with enzymes to produce cellulose sugars; and fermentating the cellulose sugars in the presence of a stillage residue from a whole grain starch-to-ethanol dry mill process, wherein the step of pretreating the lignocellulosic biomass includes process conditions including the step of exposing the lignocellulosic biomass to steam in a reaction vessel at an elevated temperature and reaction pressure for a preselected exposure time, and releasing the reaction pressure for explosive decomposition of the lignocellulosic biomass, wherein the process conditions are selected for the achievement of a severity index of 3.9 to 4.1.