Ethanol fermentation in a tower fermenter using self-aggregating Saccharomyces uvarum
- Da-Yeh Institute of Tech., Chan-Hwa (Taiwan, Province of China)
- Purdue Univ., West Lafayette, IN (United States)
A self-aggregating strain of Saccharomyces uvarum (U4) was used as a biocatalyst to carry out continuous ethanol fermentation in a tower fermentor equipped with a cell separator. Cell aggregates (2-3 mm) formed a stable packed bed in the fermentor, and the cell separator retained yeast cells effectively. Corn steep liquor was used as a nitrogen source for the fermentation of corn syrup and black strap molasses. An ethanol productivity of 54 g/L/h was reached using corn syrup at a dilution rate of 0.7/h, and sugar concentration in the feed was 15% (w/v). For molasses fermentation, an ethanol productivity of 22 g/L/h was obtained at a dilution rate of 0.7/h, and sugar concentration in the feed was 12.5% (w/v). Ethanol yields obtained from tower fermentation are higher than those obtained from flask fermentation (96% for corn syrup fermentation and 92% for molasses fermentation). No significant loss in fermentation activity was observed after 3 mo of operation. 20 refs., 9 figs., 1 tab.
- OSTI ID:
- 6842619
- Journal Information:
- Applied Biochemistry and Biotechnology; (United States), Vol. 45-46; ISSN 0273-2289
- Country of Publication:
- United States
- Language:
- English
Similar Records
Ethanol fermentation in a three-phase tower fermentor using self-aggregating yeast
Ethanol production by immobilized Saccharomyces cerevisiae, Saccharomyces uvarum, and Zymomonas mobilis