Abstract
Keratinase is an important enzyme used for degradation of the keratinous wastes, especially slaughterhouse and poultry-derived wastes, that cause environmental pollution. In the current study, optimum conditions for keratinase production by Micrococcus luteus Y23-18 strain were investigated using Taguchi DOE L9 orthogonal array. For this purpose, the selected environmental factors were initial pH, incubation temperature and time. The optimal conditions were obtained as pH 9.5, temperature 30˚C and 3 days. The obtained results showed that keratinase activity was enhanced approximately 2.3-folds (34.95 U mL-1) when compared with the unoptimized conditions (15.33 U mL-1). As a result, M. luteus Y23-18 is an effective keratinase producer microorganism and Taguchi design of experiment is a useful tool for optimization.
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