Biodegradation raw trimming waste from goat's skin tannery by enzymatic method

The tannery industry produces large amount of waste from many parts that cannot be used in making leather products. Process of minimizing the waste can be done by trimming the goat skin. The treatment of trimmed goat skin waste from tanneries can potentially produce value-added products. A study on enzymatic treatment of leather processing waste from local goat skin was conducted. This method utilized pepsin which belong to alkaline protease. Pepsin hydrolysed the skin for 48 hours at 4 °C. Hydrolysed raw skin was used to produce collagen. The size measurement of hydrolysed collagen can be analysed and after electrophoresis using SDS-polyacrylamide gel electrophoresis (SDS-PAGE) technique. Hydrolysed of collagen resulted in bioactive peptide identification. Amino acid composition in the hydrolysate obtained by the enzyme hydrolysis was determined. This relative simple biological treatment of leather processing waste may provide a practical solution. The treatment method can be used to produce value-added collagen as alternative source of functional food, medical and pharmaceutical applications. © 2020 IOP Publishing Ltd. All rights reserved.