Biodegradable plastic from food waste

October 04, 2025

Researchers at Monash University have developed an innovative method to transform food waste sugars into natural bioplastic films—a major step toward replacing petroleum-based packaging with eco-friendly, compostable alternatives. This breakthrough could revolutionize materials used in food packaging and agricultural applications such as silage wrap.

Creating next-generation bioplastics

Led by Edward Attenborough and Dr. Leonie van ’t Hag, the research team aims to design smarter, sustainable plastics that reduce single-use waste in packaging and medical applications.
With global plastic production surpassing 400 million tonnes each year, the Monash University study showcases the potential of polyhydroxyalkanoates (PHAs)—a new class of biodegradable polymers made from food waste sugars.

Harnessing nature to produce plastic

The team selected two soil-dwelling bacteria, Cupriavidus necator and Pseudomonas putida, feeding them a precisely balanced mixture of sugars, salts, and nutrients. As these microbes grew, they began storing natural plastic polymers inside their cells.
Scientists then extracted these materials using solvents and cast them into ultrathin films approximately 20 microns thick, testing their elasticity, tensile strength, and melting behavior.

Customizing bioplastics for different uses

By combining the stiff polymer produced by C. necator with the softer, flexible variant from P. putida, the researchers discovered they could fine-tune essential properties such as crystallinity, melting point, and mechanical strength—creating customizable films that mimic the performance of traditional plastics.

“Our work shows how food waste can be turned into sustainable, compostable films with adjustable properties,” said Mr. Attenborough. “PHAs are incredibly versatile, allowing us to reimagine everyday materials without the environmental toll of petroleum-based plastics.”

Industry collaboration and Rreal-world potential

The research team is now partnering with Enzide and Great Wrap through the ARC RECARB and VAP hubs, exploring commercial applications for biodegradable packaging and medical-grade films. These collaborations aim to translate laboratory innovations into scalable, real-world solutions.

Building on previous breakthroughs

This study builds on earlier Monash University research demonstrating the potential of PHAs in sustainable drug delivery systems. By advancing the design of temperature-sensitive packaging and biomedical films, the team is paving the way for a circular economy where food waste fuels the next generation of sustainable materials.