Abstract:

To obtain high efficient keratin-degraded bacteria, strain NJY1 from environment soil was isolated by feather meal as its sole source of carbon, nitrogen. Strain NJY1 was identified as Bacillus thuringiensis based on morphology observation, physicochemical characteristics and 16S rRNA sequence analysis (GenBank ID: EU624205) due to100% homology with it. The degradation rate of feather was up to 72.5% after 72 h of fermentation at 37 °C, and soluble protein concentration in fermented liquid was 25.2mg/mL. We provided a high efficient keratin-degraded bacterium to product high quality protein feed.