Agricultural Waste: Pomelo Peels Transformed Into Food Wrap

Every year, about one-third of the world's food is wasted during distribution, with losses particularly severe for seafood and fresh fruits and vegetables. In May 2026, research findings released by the Heilongjiang Institute of the Chinese Academy of Fishery Sciences offered an unexpected solution to this problem: using pomelo peels to make food preservation film. The research team utilized pomelo peels to prepare a carbon-based composite material with peroxidase-like activity, successfully developing a composite active preservation film that combines antibacterial and antioxidant functions. This food preservation film is rich in phenolic compounds and possesses strong antioxidant capacity, effectively inhibiting lipid oxidation in rainbow trout; chitosan, meanwhile, contributes excellent film-forming properties and antibacterial effects, creating a dual "antibacterial + antioxidant" preservation effect. In practical applications, when this preservation film was used on rainbow trout fillets stored at 4°C, monitoring of spoilage indicators-including malondialdehyde, acid value, and volatile basic nitrogen-confirmed that it extended the shelf life of the rainbow trout by 3 to 6 days. Antimicrobial tests also confirmed that the preservation film significantly inhibited both Escherichia coli and Staphylococcus aureus.

The significance of this technology extends far beyond simply turning waste into a valuable resource. From an industrial perspective, it achieves a multidisciplinary integration of "agricultural waste resource utilization-bionic enzyme catalysis-seafood preservation"; from a consumer perspective, it means that fish purchased for home consumption can be stored for several additional days while remaining as fresh as ever, significantly reducing household food waste. A similar approach has also been validated in the fruit and vegetable sector-a new type of packaging film developed by the Chinese Academy of Agricultural Sciences using nanofibers derived from red jute cellulose has extended the shelf life of bananas and mangoes from 2 days to about 8 days. As agricultural byproducts such as pomelo peels and red jute-which were once discarded-are transformed into powerful tools for preserving freshness, the functional boundaries of food wrap are being redefined-it is no longer merely a passive plastic barrier, but an "active guardian" capable of actively combating spoilage and extending the shelf life of food.