Ethanol fermentation in a tower fermenter using self-aggregating Saccharomyces uvarum

Journal Article · · Applied Biochemistry and Biotechnology; (United States)

DOI:https://doi.org/10.1007/BF02941828· OSTI ID:6842619

Chen, C S; Chan, E; Wang, S L ^[1]; Gong, C S; Chen, L F ^[2]

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1. Da-Yeh Institute of Tech., Chan-Hwa (Taiwan, Province of China)
2. 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), Journal Name: Applied Biochemistry and Biotechnology; (United States) Vol. 45-46; ISSN ABIBDL; ISSN 0273-2289
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
090900* -- Biomass Fuels-- Processing-- (1990-)
ALCOHOLS
BIOCONVERSION
BIOLOGICAL PATHWAYS
BIOSYNTHESIS
ETHANOL
EUMYCOTA
FERMENTATION
FUNGI
HYDROXY COMPOUNDS
MICROORGANISMS
MOLASSES
ORGANIC COMPOUNDS
PLANTS
SACCHAROMYCES
SYNTHESIS
YEASTS