Abstract
The production of an extracellular polysaccharide, EPS-R, from the marine bacteriumHahella chejuensis was investigated at various aeration rates in a batch culture. Higher aeration rate resulted in enhanced EPS production and increased the viscosity of the culture broth. At an aeration rate of 1.5 vvm, EPS-R (12.2 g/L) was obtained with a yield (Y P/S) of 0.6 from the STN medium after 72h of cultivation. TheH. chejuensis cells changed their rod morphology to a short-rod form in the stationary growth phase.
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