Abstract
A strain of Kocuria rosea with keratinolytic activity was studied. In batch culture, the optimum temperature for feather degradation, bacterial growth and protease secretion was at 40 °C. A specific growth rate of 0.17 h−1 was attained in basal medium with feathers as fermentation substrate. Under these conditions, after 36 h of incubation, biomass and caseinolytic activity reached 3.2 g/l and 0.15 U/ml, respectively. Extracellular protease secretion was associated with the exponential growth phase. In batch fermentation, feather degradation up to 51% in 72 h was obtained with a conversion yield in biomass of 0.32 g/g. No organic acids were detected in the fermentation broth in significant amount.
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Vidal, L., Christen, P. & Coello, M. Feather degradation by Kocuria rosea in submerged culture. World Journal of Microbiology and Biotechnology 16, 551–554 (2000). https://doi.org/10.1023/A:1008976802181
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DOI: https://doi.org/10.1023/A:1008976802181