Chicken feather as the waste byproduct of commercial poultry processing plants
and chicken slaughter industries is accumulating at a higher rate [1]. The accumulation
of feathers can eventually lead to environmental pollution and can also be
considered as a waste of feather protein [2]. Traditional ways to degrade feathers
such as alkali hydrolysis and steam pressure cooking to produce feather meal may
destroy amino acids and they also consume large amounts of energy [3]. Microbial
keratinases mainly target the hydrolysis of highly rigid, strongly cross-link