Abstract Chicken feathers that make up 4-6% of total weight of chicken are most influential waste by-product from poultry farm and slaughter. Annual worldwide generation of several tons of feather biomass raise solid waste management concerns. In environmental perspective. the burning or dumping in landfills are not promising approaches. https://www.roneverhart.com/Modern-Rectangular-Keyed-Entry-Pocket-Door-Emtek-2113/