Abstract
The production of water-soluble single-sugar glucuronic acid-based oligosaccharides (WSOS) by a cellulose producing strain Gluconacetobacter hansenii PJK was studied in a periodically recycled and fed-batch cultivations using glucose/ethanol or glucose only. Fermentations were carried out in a 2 L jar fermenter equipped with a turbine impeller with 6 flat blades. WSOS were produced constantly but the bacterial cellulose (BC) production stopped at 48 h of cultivation in a periodically recycled culture using the exhausted medium supplemented with glucose and ethanol. Tremendous quantities of WSOS were obtained in fed-batch cultivations using glucose/ethanol (35.6 g/L at 132 h of cultivation) or glucose only (86 g/L after 240 h of cultivation) as the nutritional source. However, the BC production yield under these nutritional conditions decreased significantly in comparison to previous studies about the BC production by the same strain. The overall results revealed that G. hansenii is capable of producing enormous quantities of WSOS compared to those reported previously for compounds of a related chemical nature. Moreover, the WSOS production was found to be dependent on the pH of the culture broth.
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Khan, T., Khan, S. & Park, J.K. Simple fed-batch cultivation strategy for the enhanced production of a single-sugar glucuronic acid-based oligosaccharides by a cellulose-producing Gluconacetobacter hansenii strain. Biotechnol Bioproc E 13, 240–247 (2008). https://doi.org/10.1007/s12257-007-0212-8
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DOI: https://doi.org/10.1007/s12257-007-0212-8