Got Beer? Europe Just Found a Use for the Leftovers

A five-year EU consortium has shown brewery waste can yield commercial-grade bioplastics just as packaging regulations tighten

31 Mar 2026

Five years ago, a group of 18 European organisations made a bet: that the soggy grain left over after brewing beer could replace oil-derived plastics in commercial packaging. They just cashed in.

The BioSupPack project, coordinated by AIMPLAS and funded through the EU's Horizon 2020 programme, formally wrapped on 26 March 2026. The consortium, which included packaging specialists Logoplaste Innovation Lab and materials firm SABIOMATERIALS, spent five years developing a biorefinery process that converts brewery spent grains into PHB, a high-performance bioplastic, using plasma pretreatment and microbial fermentation.

The results are further along than most sustainability pilots get. Rigid packaging formats, think bottles and retail displays, reached Technology Readiness Level 7, meaning they are cleared for industrial-scale production. A patented PHA plastisol coating came out 99 percent bio-based. Compostable fibre packaging with barrier properties matching conventional plastics was validated for food service use, covering everything from ice cream cups to retail trays.

That last detail matters more than it might sound. Barrier performance is usually where bio-based materials fall short, failing to keep oxygen and moisture out well enough for real food contact applications. BioSupPack's fibre-based formats cleared that bar.

The timing is pointed. The EU Packaging and Packaging Waste Regulation takes effect in August 2026, requiring all packaging sold in the bloc to be recyclable by 2030. Manufacturers who have not started planning are already behind. With validated materials at advanced readiness levels, BioSupPack's innovations are now on the table for licensing and scale-up talks across the European packaging sector.

There is still a gap to close. Hasso von Pogrell of European Bioplastics acknowledged that while the project proves circular bio-based packaging is no longer a distant prospect, cost competitiveness and supply chain scale remain the real tests. Brewery spent grains are abundant, roughly 20 percent currently ends up in landfill, but turning abundance into affordability at commercial volume is a different problem than proving it works in a lab.

The science is settled. The hard part starts now.