Rate and yield relationships in the production of xanthan gum by batch fermentations using complex and chemically defined growth media
Rate and yield information relating to biomass and product formation and to nitrogen, glucose and oxygen consumption are described for xanthan gum batch fermentations in which both chemically defined (glutamate nitrogen) and complex (peptone nitrogen) media are employed. Simple growth and product models are used for data interpretation. For both nitrogen sources, rate and yield parameter estimates are shown to be independent of initial nitrogen concentrations. For stationary phases, specific rates of gum production are shown to be independent of nitrogen source but dependent on initial nitrogen concentration. The latter is modeled empirically and suggests caution in applying simple product models to xanthan gum fermentations. 13 references.
- Research Organization:
- National Food Research Institute, Pretoria, South Africa
- OSTI ID:
- 6629322
- Journal Information:
- Biotechnol. Bioeng.; (United States), Vol. 28:10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
XANTHUM GUM
BIOSYNTHESIS
BATCH CULTURE
BIOCHEMICAL REACTION KINETICS
CULTURE MEDIA
FERMENTATION
GLUCOSE
GROWTH
MATHEMATICAL MODELS
NITROGEN
OXYGEN
ALDEHYDES
BIOCONVERSION
CARBOHYDRATES
ELEMENTS
HEXOSES
KINETICS
MONOSACCHARIDES
NONMETALS
ORGANIC COMPOUNDS
POLYSACCHARIDES
REACTION KINETICS
SACCHARIDES
SYNTHESIS
140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
020300 - Petroleum- Drilling & Production