Production of ethanol from corn fiber
Conference
·
OSTI ID:140216
- National Renewable Energy Lab., Golden, CO (United States)
- New Energy Company of Indiana, South Bend, IN (United States)
In the corn dry-milling process, ethanol is produced from the starch-based carbohydrate fraction of the corn kernel. The remaining carbohydrate fiber -- which includes cellulose, hemicellulose, and unconverted starch, along with protein, fats, and oils -- is recovered, dried, and sold as an animal feed supplement known as distillers dried grains and solubles (DDGS). Since the value of any animal feed supplement is directly based on its protein content, it is possible to remove the fiber fraction without diminishing the value of this co-product. A Cooperative Research and Development Agreement between the National Renewable Energy Laboratory and the New Energy Company of Indiana has been investigating process alternatives for incorporating the conversion of corn fiber to ethanol into an existing dry-milling production facility. In corn, about 13% of the potential ethanol from the carbohydrate fraction originates from cellulose, hemicellulose, and sugars significant amounts of starch-based components that are unconverted in the dry-milling process. Process additions based on simultaneous saccharification and fermentation and hemicellulose conversion technologies can significantly improve the yield and economics of ethanol production from corn by converting these carbohydrate-based components that typically become a zero-value constituent of DDGS in dry-milling processes.
- Research Organization:
- National Renewable Energy Lab., Golden, CO (United States)
- OSTI ID:
- 140216
- Report Number(s):
- NREL/CP--200-5768-Vol.2; CONF-9308106--Vol.2; ON: DE94000435
- Country of Publication:
- United States
- Language:
- English
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