ETHANOL-PRODUCTION FROM GLUCOSE BY FREE AND AGAR-ENTRAPPED BATCH CULTURES OF SACCHAROMYCES-CEREVISIAE AT DIFFERENT OXYGENATION LEVELS

Authors
HINFRAY C JOUENNE T JUNTER GA
Citation
C. Hinfray et al., ETHANOL-PRODUCTION FROM GLUCOSE BY FREE AND AGAR-ENTRAPPED BATCH CULTURES OF SACCHAROMYCES-CEREVISIAE AT DIFFERENT OXYGENATION LEVELS, Biotechnology letters, 16(10), 1994, pp. 1107-1112
Citations number
17
Categorie Soggetti
Biothechnology & Applied Migrobiology
Journal title
Biotechnology letters → ACNP
ISSN journal
01415492
Volume
16
Issue
10
Year of publication
1994
Pages
1107 - 1112
Database
ISI
SICI code
0141-5492(1994)16:10<1107:EFGBFA>2.0.ZU;2-4
Abstract
The influence of the oxygenation level on glucose alcoholic fermentati on by free- and immobilized-cell batch cultures of Saccharomyces cerev isiae (CBS 1200) was investigated. Ethanol production by suspended cul tures was stimulated by moderate oxygen flow rates (OFRs) but inhibite d by higher OFRs (1.25 mol O-2 h(-1) dm(-3)). On the contrary, agar-en trapped yeasts displayed the best fermentation performance under stric t anaerobiosis and were less affected than free cultures by high OFRs. These results are discussed by referring to the substrate mass transf er limitations inherent in immobilized-cell systems.