Use of enzymatic processes in the tanning of leather materials

Abstract

The policy of sustainable development, the need to save natural environmental resources, and the use of waste as raw materials in new production processes allow the use of enzymes in many industries. Enzymatic tanning and chrome tanning are two different methods used in the leather industry to transform raw hides into a durable and usable material. Enzymatic tanning uses natural enzymes that are biodegradable and environmentally friendly. Additionally, enzymatic tanning requires less water and generates less waste than chrome tanning. Moreover, enzymatic tanning can result in softer and more flexible leather with better uniformity. Enzymes selectively break down collagen fibers, resulting in a more even tanning and a consistent leather product. The use of combined enzymatic technologies with non-obvious leather finishing methodologies in tanning is forced by European Union regulations limiting the use of hazardous substances and generating significant amounts of corrosive wastewater for the environment. However, tanning with enzymes is not a perfect process; therefore, this work presents the advantages and disadvantages of tanning with enzymes and describes new technological trends in the tanning industry.