期刊
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
卷 160, 期 2, 页码 378-385出版社
HUMANA PRESS INC
DOI: 10.1007/s12010-008-8308-y
关键词
Ethanol; Glucose; Pachysolen tannophilus; Xylose
资金
- National Science Foundation of China [20576013]
- National Science Fund for Distinguished Young Scholars [20325622]
- National 973 Project [2007CB707804]
- Beijing Natural Science Foundation [2071002]
- Beijing Science and Technology [D0205004040211]
- 863 High-Tech Project [2006AA020103, 2006AA020102, 2006AA020201]
The influence of ethanol on fermentation by Pachysolen tannophilus was studied. When xylose utilization rate was 80%, ethanol concentration began to decline. Fermentation of P. tannophilus was affected by ethanol addition in the beginning of fermentation; average xylose consumption rate was 0.065 g center dot l(-1)center dot h(-1), and maximum specific growth rate was 0.07 h(-1) at 28 g center dot l(-1) ethanol, comparing with the average xylose consumption rate of 0.38 g center dot l(-1)center dot h(-1) and maximum specific growth rate of 0.14 h(-1) in fermentation with no ethanol addition; P. tannophilus stopped growth at 40 g center dot l(-1) ethanol. When the initial ethanol concentration was 30 g center dot l(-1), the addition of glucose in xylose media made the growth of P. tannophilus better, and the most favorable glucose concentration was 15 g center dot l(-1) with the highest biomass of 1.51 g center dot l(-1) as compared with that of 0.95 g center dot l(-1) in pure xylose media.
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