LIQUEFACTION AND SACCHARIFICATION OF GRANULAR STARCH AT HIGH CONCENTRATION

摘要

The present teachings provide methods of processing granular starch in slurries containing high dry solids content. The slurries are initially incubated with enzymes at or below the gelatinization temperature. The use of pullulanase and glucoamylase at specified doses allows for improved glucose yields at lower energy cost.

主权项

1. A method of processing granular starch comprising:
(a) contacting granular starch, water and one or more granular starch hydrolyzing enzymes including an alpha-amylase and/or a glucoamylase to produce slurry in which the concentration of dry solids is greater than 38% by weight, (b) incubating the slurry at a temperature above 40° C. and at or below the gelatinization temperature of the granular starch for at least five minutes to produce a composition in which the granular starch has been partially hydrolyzed into oligo- and/or mono-saccharides by the one or more enzymes; and (c) raising and holding the temperature of the partially hydrolyzed composition above the gelatinization temperature of the granular starch to produce a liquefied composition.