Sahoo, Debendra K and Agarwal, Gopal P (2002) Effect of oxygen transfer on glycerol biosynthesis by an osmophilic yeast Candida magnoliae I(2)B. Biotechnology and bioengineering, 78 (5). pp. 545-55. ISSN 0006-3592

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Abstract

The influence of oxygen on glycerol production by an osmophilic yeast, Candida magnoliae I(2)B, was studied in a bioreactor. Oxygen transfer rates (OTRs) and volumetric oxygen transfer coefficients (k(L)a) were determined at different aeration and agitation rates. Cell growth as well as glycerol production was strongly affected by oxygen supply. Improvement in OTRs resulted in increased cell growth and glycerol yield. However, at high OTRs, there was a reduction in glucose uptake rate, indicating Pasteur Effect, and glycerol accumulation was also reduced at k(L)a of 253 h(-1). The availability of oxygen per unit of cell mass was found to be the most important factor that controlled cell growth, glucose uptake, and glycerol yield. The overall productivity and yield of glycerol could be related with k(L)a. The biosynthesis of glycerol was found to both growth- and non-growth-associated, although glycerol was mainly produced in post-exponential phase.

Item Type:	Article
Additional Information:	Copyright of this article belongs to Wiley.
Subjects:	Q Science > QR Microbiology
Depositing User:	Dr. K.P.S.Sengar
Date Deposited:	06 Feb 2012 18:17
Last Modified:	06 Feb 2012 18:17
URI:	http://crdd.osdd.net/open/id/eprint/899

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