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Oceans and fisheries
  • Project

Algae-based biodegradable edible film

The SeaFilm food packaging project aims to create a substitute for single-use plastic film in conserving frozen fish with a new algae-based edible solution, whilst increasing product shelf life through the incorporation of bioactive seaweed extracts.

Seafood samples wrapped in traditional blue plastic film and different types of active biofilm
Seafood samples wrapped in traditional blue plastic film and different types of active biofilm
© Polytechnic University of Leiria, Portugal

The most common technique in the world of food packaging is single-use plastic films. This project aimed to provide the industry with a new algae-based edible solution to replace plastic films whilst increasing product shelf life through the incorporation of bioactive seaweed extracts.

This novel material will decrease the environmental impact of seafood freezing whilst actively extending shelf life through the incorporation of extracts from the seaweed Grateloupia turuturu. It also helps to differentiate seafood products, reduce food waste and cut the amount of single-use plastics used in the production of frozen seafood. When used as a wrapper, it helps to conserve frozen seafood for longer while maintaining the quality.

Results

The film has been shown to extend shelf-life in frozen salmon, significantly reducing freezer burn. Recent results indicate that it might also extend the shelf life of seafood after defrosting by delaying microbial growth.

For most species tested, the researchers observed a delay in the development of microorganisms after thawing.

After defrosting the frozen fish, the biodegradable film can either be disposed of or simply eaten along with the fish. In the latter case, the edible film could even include seasonings to create a meal that is tasty, convenient, and easy to cook.

Contact

Organisation
Instituto Politécnico de Leiria
Email
mareatipleiria [dot] pt
Phone number
(+351) 262 240 200