Abstract
Physiological conditions enhancing rhamnose-containing polysaccharide synthesis by Klebsiella I-714 were studied in batch culture (0.3-l and 2-l bioreactors). The four carbon sources tested, sucrose, sorbitol, Neosorb and Cerelose, allowed exopolysaccharide production. Larger amounts of polymer were produced when high carbon/nitrogen ratios and complex nitrogen sources were used. Exopolysaccharide synthesis was greatest at 30 °C, which was a suboptimal growth temperature. A reduction in the phosphate content of the medium enhanced rhamnose-containing polysaccharide production. When the initial carbon source concentration was augmented, byproducts other than exopolysaccharide were formed. Rhamnose-containing polysaccharide rheology can be modulated by changing the phosphate content of the medium.
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Received: 11 April 1997 / Received revision: 19 June 1997 / Accepted: 23 June 1997
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Farrés, J., Caminal, G. & López-Santín, J. Influence of phosphate on rhamnose-containing exopolysaccharide rheology and production by Klebsiella I-714. Appl Microbiol Biotechnol 48, 522–527 (1997). https://doi.org/10.1007/s002530051090
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DOI: https://doi.org/10.1007/s002530051090