Abstract
Poultry waste especially feathers consists of over 90% proteins, which are primarily keratins. The enzyme assisted microbial degradation of keratins is a beneficial alternative to convert waste into value added products. In the present work, optimization of nutritional and physical parameters was achieved for Bacillus cereus strains to enhance the production of keratinases responsible for degradation of keratins present in feather waste. The results showed 2.29-fold increase in keratinase activity after optimization leading to 98.6 % degradation of feathers in 48 h for B. cereus strain H16 and 2.03 fold for strain H3 (2) resulting in 80.46 % degradation of feathers in 60 h. The study concluded that B. cereus H16 could be employed as potent keratinolytic bacterial isolate for processes involving conversion of keratinous waste into feed supplement and nitrogenous fertilizer.
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