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Corn Hull Hydrolysis Using Glucoamylase and Sulfuric Acid
Author(s) -
Osborn D.,
Chen L. F.
Publication year - 1984
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19840361106
Subject(s) - hemicellulose , xylose , hydrolysis , sulfuric acid , starch , chemistry , hull , cellulose , sugar , fermentation , food science , fraction (chemistry) , hydrolysate , biochemistry , chromatography , organic chemistry , materials science , composite material
Corn hull from a wet milling process contains 23% starch, 38% hemicellulose, 11% cellulose, 11.8% protein, 1.2% ash, and minor constituents. The starch fraction can be completely hydrolyzed by glucoamylase after the hull is heated with steam for 5 min. The hemicellulose fraction of destarched hull can be further hydrolyzed by sulfuric acid with a solid‐acid ratio of about 30 to 1 and a liquidsolid ratio of about 3 to 1. A process based upon the above findings yields 49 lb. of fermentable sugar (xylose + glucose) per 100 lb. of dry corn hull. The product does not inhibit yeast fermentation.