Polyhydroxyalkanoate production from poly(ethylene furanoate) using a completely biotechnological approach

Area of Science:

• Biotechnology
• Polymer Science
• Environmental Science

Background:

• Plastic production and disposal create significant environmental issues.
• Poly(ethylene furanoate) (PEF) is a bio-based alternative to poly(ethylene terephthalate) (PET).
• Sustainable plastic management requires innovative recycling solutions.

Purpose of the Study:

• To develop a fully biotechnological upcycling system for PEF.
• To demonstrate the enzymatic depolymerization of PEF and microbial conversion of its components.
• To establish a proof-of-concept for sustainable PEF management.

Main Methods:

• Enzymatic depolymerization of PEF using a thermostable cutinase variant.
• Isolation and characterization of bacterial strains for FDCA conversion.
• Microbial production of polyhydroxyalkanoate (PHA) from FDCA.

Main Results:

• Isolated Pseudomonas sp. S8-1 and Caballeronia sp. S8-5 strains capable of utilizing FDCA.
• Demonstrated efficient PEF depolymerization by cutinase, enhanced with CaCO3.
• Successfully produced PHA from PEF degradation products using Caballeronia sp. S8-5.

Conclusions:

• A viable biotechnological upcycling pathway for PEF has been established.
• This system converts waste PEF into valuable biodegradable PHA.
• The findings represent a significant step towards sustainable plastic recycling.