CHARACTERIZATION OF A NOVEL THERMOTOLERANT YEAST, KLUYVEROMYCES-MARXIANUS VAR MARXIANUS - DEVELOPMENT OF AN ETHANOL FERMENTATION PROCESS

Citation
Cj. Hack et R. Marchant, CHARACTERIZATION OF A NOVEL THERMOTOLERANT YEAST, KLUYVEROMYCES-MARXIANUS VAR MARXIANUS - DEVELOPMENT OF AN ETHANOL FERMENTATION PROCESS, Journal of industrial microbiology & biotechnology, 20(6), 1998, pp. 323-327
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Biothechnology & Applied Migrobiology
Volume
20
Issue
6
Year of publication
1998
Pages
323 - 327
Database
ISI
SICI code
Abstract
The fermentation characteristics of the novel, thermotolerant, isolate Kloyveromyces marxianus var marxianus were determined to evaluate its aptitude for use in an ethanol production process, Sustainable growth was not observed under anaerobic conditions, even in the presence of unsaturated fatty acid and sterol, A maximum ethanol concentration of 40 g L-1 was produced at 45 degrees C, with an initial specific ethano l production rate of 1.7 g g(-1) h(-1). This was observed at ethanol c oncentrations below 8 g L-1 and under oxygen-limited conditions, The l ow ethanol tolerance and low growth under oxygen-limited conditions re quired for ethanol production implied that a simple continuous process was not feasible with this yeast strain. Improved productivity was ac hieved through recycling biomass into the fermenter, indicating that u tilising an effective cell retention method such as cell recycle or im mobilisation, could lead to the development of a viable industrial pro cess using this novel yeast strain.