“…On the other hand, animal by-products comprise large amounts of carcasses, skins, hooves, heads, feathers, viscera, bones, fat, meat trimmings, blood, and other animal fluids (Ockerman and Hansen, 2000;Waldron, 2007), as well as meat out of specification and significant amounts of milk processing residues such as whey and other fractions from the separation process (Ben-Othman et al, 2020). The meat sector, for example, records losses of up to 23% of everything produced, including consumption losses, industrial processing, distribution, inadequate storage conditions, and failures in the freezing process (Karwowska et al, 2021). The dairy industry generates around 4 to 11 million tons of waste per year, including whey, dairy sludge, and wastewater (processing, cleaning, and sanitary), with great pollutant potential (Ahmad et al, 2019;Lemes et al, 2020a).…”