Abstract
Eight different agro-residues were tested for α-amylase and protease production by using Bacillus licheniformis ZB-05. Among them, rice husk (RH) was proved as the best substrate for two enzymes (α-amylase 443 U/g and protease 469,000 U/g). Maximum enzyme production was observed to be 30 % initial moisture, with a growth period of 36 h in 20 and 30 % inoculum volumes for α-amylase and protease, respectively. The best enzyme recovery from solid mass was obtained when extracted with tap water. Among the tested various nitrogen sources, 1 % ammonium sulphate followed by 2 % Bacto liver, 2 % ammonium sulphate and 1 % Bacto casaminoacid served as the best inorganic and organic nitrogen sources for α-amylase and protease production, respectively. As additional carbon sources, 2 % soluble starch enhanced α-amylase production, while 1 % maltose enhanced protease production.
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This work was supported by Dicle University Scientific Research Foundation (DUBAP-06-FF-102).
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Karataş, H., Uyar, F., Tolan, V. et al. Optimization and enhanced production of α-amylase and protease by a newly isolated Bacillus licheniformis ZB-05 under solid-state fermentation. Ann Microbiol 63, 45–52 (2013). https://doi.org/10.1007/s13213-012-0443-6
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DOI: https://doi.org/10.1007/s13213-012-0443-6