Patent ID: 8298796
Filing Date: 2012-10-30
Classification: C12P,Y02E

Abstract:
1. A method for processing a lignocellulosic feedstock to produce glucose, said method comprising the steps of: (i) pretreating the lignocellulosic feedstock with acid to produce a composition comprising pretreated feedstock; (ii) providing a calcium-containing stream that comprises calcium that is obtained from the lignocellulosic feedstock; (iii) producing a calcium carbonate-containing stream that is obtained by precipitation of said calcium from the calcium-containing stream; (iv) adjusting the pH of a stream comprising said pretreated feedstock with wherein said adjusting of the pH of said stream comprising the pretreated feedstock produces a neutralized, pretreated lignocellulosic feedstock having a pH between about 3 and about 9 and wherein the pH of the neutralized, pretreated lignocellulosic feedstock thus produced is greater than the pH of the composition comprising pretreated feedstock produced in step (i); and (v) carrying out enzymatic hydrolysis of said neutralized, pretreated lignocellulosic feedstock with cellulase enzymes to produce the glucose.