Bioconversion of Keratin Wastes Using Keratinolytic Microorganisms to Generate Value-Added Products

Figure 12

Examination of lime sulfide and keratinase dehairing approaches. Despite they share comparable dehairing mechanism and breakdown of disulfide bonds in the polypeptides, the chemical method attacks the hair shaft outside the skin, and remaining hairs are available on the skin surface, while keratinase attacks the hair root to produce shaft-free skins: Note: a = whole intact hair on the skin without treatment, b = dehairing with chemicals and parts of hair shaft was still remaining on the surface of the hide, and c = dehairing with keratinolytic enzyme and skins are free from any hair shaft on the surface of the hide [148].