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A two-step biotechnological process was developed using Bacillus licheniformis S6 to provide a simple and economical procedure which significantly improved feather meal nutrition value. Compared with IFM (initial feather meal) and CFM (commercial feather meal), SFEFM (feather meal gained by solid fermentation and enzymolysis with continuous agitation) had a significant improvement (P<0.05) in vitro...