ISSN:
1573-0972
Keywords:
Biodegradation
;
feather
;
Kocuria rosea
;
submerged cultures
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1008976802181
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