Abstract
Corn fiber (CF) is a potential raw material for the production of various products because it is widely available in corn-producing countries. Corn fiber is a byproduct of the corn wet-milling industry and a very large amount of it (approximately 130 t/day) is produced in Hungary. The major component of corn fiber is the pericarp that consists of 35% hemicellulose, 18% cellulose and 20% remaining starch (protein, fiber oil and lignin are also present in this material). Corn fiber is presently used as animal feed. However, with continuous growth in corn processing to ethanol, there might be problems with the utilization of the surplus fibrous byproducts. In this paper the conversion of corn fiber to ethanol or other products was examined. Destarched corn fiber was pretreated by using different alkaline solutions and dissolved hemicellulose was precipitated with ethanol for the recovery of a valuable coproduct. The residual material consisting mostly of cellulose was hydrolyzed with cellulolytic enzymes and fermented into ethanol by using Saccharomyces cerevisiae.
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