The head of European Bioplastics, Lorenza Romanese, has warned that compostable packaging should not be viewed as a universal replacement for conventional plastics. Instead, the industry must be highly selective about where compostable materials are deployed to prevent widespread contamination of both organic waste and mechanical recycling streams.
Waste management operators have long raised concerns that compostables disrupt existing recycling infrastructures. When flexible compostable packaging enters mechanical sorting facilities, it is often indistinguishable from conventional polymers like polyethylene or polypropylene. This leads to batch contamination and downgraded recyclate quality. Conversely, conventional plastics frequently contaminate organic waste streams due to confusing consumer labelling. Romanese noted that "the ambition should not be to make everything compostable," advocating instead for targeted applications and acknowledging the severe limitations of home composting systems.
For UK waste management firms and Turkish recyclers, this call for restraint is highly significant. Turkish recyclers rely heavily on high-quality polymer scrap imported from the UK to produce high-value regrinds. If compostable plastics proliferate unchecked in the UK municipal stream, the risk of cross-contamination in exported baled waste increases. This directly threatens the yield and mechanical properties of Turkish recyclate, potentially driving up sorting costs and complicating compliance with strict import purity standards. For UK waste firms, clearer boundaries on compostables will help safeguard the value of their dry recyclables.
Practical Takeaway: Packaging converters and waste managers should restrict compostable solutions to applications where food contamination is unavoidable—such as tea bags, fruit stickers, or very thin collection bags—while keeping dry packaging firmly within the mechanical recycling loop to preserve material value.
