One stone several birds-Sustainable valorization of pork processing wastes via versatile green solvent-prompted...

The utilization of food waste as a valuable source for bioactive extraction is vital for sustainable development. This study developed an environmentally friendly solvent-involved enzymatic system, which served a novel and multifunctional platform for the preparation of pork processing waste-derived dressing films. The α-chymotrypsin (α-Chy) exhibited enhanced activity (121.11 %) and stability in the newly developed system. The hemin and enzymolysis products were obtained from pork waste using the green solvents and their mixture with α-Chy, respectively. The composite dressing film prepared by pork waste exhibited excellent multiple properties, particularly in terms of ultraviolet shielding and antibacterial activity. The green solvents play multifunctional roles (extractant, enzymolysis-enhanced medium, plasticizer, osmotic agent, and antibacterial agent) in whole process, acting as a means of "one stone several birds". This newly developed system was successfully applied to recover bioactive components from pork waste and convert them into value-added biomaterials.