Ethanol production from enzymatic hydrolysates of AFEX-treated coastal bermudagrass and switchgrass
Conference
·
OSTI ID:150394
- Texas A&M Univ., College Station, TX (United States)
- National Research Center, Cairo (Egypt)
Switchgrass and coastal bermudagrass were pretreated by ammonia fiber explosion (AFEX), and the treated materials hydrolyzed using 5 IU cellulase/g substrate. Resulting sugar solutions (2-3%, w/v) were fermented with recombinant Klebsiella oxytoca. Glucose was rapidly and completely fermented to ethanol, whereas xylose fermentation was slower and less complete. At higher sugar concentrations ({approximately} 8%) glucose fermentation continued, but xylose fermentation almost ceased. Protein extraction somewhat enhanced ethanol production from coastal bermudagrass. Improved fermentation technologies and media appear necessary for practical mixed-sugar lignocellulosic hydrolyzates.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- OSTI ID:
- 150394
- Report Number(s):
- CONF-940526--
- Country of Publication:
- United States
- Language:
- English
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