Bacterial cellulose production by Gluconacetobacter hansenii in an agitated culture without living non-cellulose producing cells

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Bacterial cellulose (BC) was produced by Gluconacetobacter hansenii PJK in ajar fermenter equipped with a 6 flat-blade turbine impeller and the relationship between the populations of non-cellulose producing cells (Cel(-) mutants) and BC production was investigated. The population of Cel(-) mutants converted from cellulose producing cells (Cel(+) cells) decreased as the impeller speed increased. Cel(+) cells seemed to be protected from the strong shear stress generated by the impeller rotating at a high speed by the BC net produced by the cells. There was an optimum impeller speed in maximizing the population of Cel(+) cells and BC production. The optimum impeller speed increased with ethanol supplementation to a basal medium. The by-product, water-soluble polysaccharide (WSPS), was a hornopolysaccharide of glucuronic acid. WSPS production was related to the population ratio of Cel(+) cells to the total cells. (c) 2005 Elsevier Inc. All rights reserved.
Publisher
Elsevier Science Inc
Issue Date
2005-08
Language
English
Article Type
Article
Keywords

LOOP AIRLIFT REACTOR; ACETOBACTER-XYLINUM; POLYSACCHARIDE

Citation

ENZYME AND MICROBIAL TECHNOLOGY, v.37, no.3, pp.347 - 354

ISSN
0141-0229
DOI
10.1016/j.enzmictec.2005.02.019
URI
http://hdl.handle.net/10203/89791
Appears in Collection
CBE-Journal Papers(저널논문)
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