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Biocatalytic recycling of plastics: facts and fiction

ASM Science Journal 2025 15 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Wolfgang Zimmermann

Summary

This review critically examines the potential of enzymes to degrade and recycle plastic waste as a complement to conventional recycling, finding that only a fraction of current plastic waste is suitable for biocatalytic breakdown and that inconsistent claims about plastic-degrading enzymes highlight the urgent need for standardized testing methods.

Due to the lack of efficient end-of-life management, the mass production of plastics has resulted in serious environmental problems. Sustainable biological approaches using enzymes to degrade and recycle plastic waste are emerging as a complement to conventional methods to promote a circular economy of plastics. Only a fraction of the plastic waste generated is currently suitable for biocatalytic deconstruction and the development of economically and environmentally competitive processes is still pending. Inconsistent claims about new plastic-degrading enzymes reveal a need for robust and standardized analysis methods to ensure reproducible results and a realistic evaluation of their potential. This paper critically reviews enzymatic synthetic polymer degradation and its recycling challenges.

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