期刊
BIOPROCESS AND BIOSYSTEMS ENGINEERING
卷 39, 期 7, 页码 1023-1032出版社
SPRINGER
DOI: 10.1007/s00449-016-1580-2
关键词
Ethanol; CaCO3; CaCl2; Xylose; Mixed cellulosic sugars; Productivity
资金
- Ohio Agricultural Research and Development Center (OARDC)
- Hatch grant [OHO01333]
- ARS [813639, ARS-0427439] Funding Source: Federal RePORTER
Studies were performed on the effect of CaCO3 and CaCl2 supplementation to fermentation medium for ethanol production from xylose, glucose, or their mixtures using Scheffersomyces (Pichia) stipitis. Both of these chemicals were found to improve maximum ethanol concentration and ethanol productivity. Use of xylose alone resulted in the production of 20.68 +/- 0.44 g L-1 ethanol with a productivity of 0.17 +/- 0.00 g L-1 h(-1), while xylose plus 3 g L-1 CaCO3 resulted in the production of 24.68 +/- 0.75 g L-1 ethanol with a productivity of 0.21 +/- 0.01 g L-1 h(-1). Use of xylose plus glucose in combination with 3 g L-1 CaCO3 resulted in the production of 47.37 +/- 0.55 g L-1 ethanol (aerobic culture), thus resulting in an ethanol productivity of 0.39 +/- 0.00 g L-1 h(-1). These values are 229 % of that achieved in xylose medium. Supplementation of xylose and glucose medium with 0.40 g L-1 CaCl2 resulted in the production of 44.84 +/- 0.28 g L-1 ethanol with a productivity of 0.37 +/- 0.02 g L-1 h(-1). Use of glucose plus 3 g L-1 CaCO3 resulted in the production of 57.39 +/- 1.41 g L-1 ethanol under micro-aerophilic conditions. These results indicate that supplementation of cellulosic sugars in the fermentation mediumwith CaCO3 and CaCl2 would improve economics of ethanol production from agricultural residues.
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