IN Brief:
- Several banking partners have approved the project through their credit committees, but due diligence remains unfinished.
- The 50,000-tonne Longlaville plant is intended to industrialise Carbios’ enzymatic PET recycling process.
- Carbios has not supplied a replacement financial close date or a revised production timetable.
Carbios has pushed back the expected production start at its planned Longlaville enzymatic PET recycling plant after confirming that project financing will not close by its previous 30 September 2026 target.
Several banking partners have approved the project through their credit committees, but due diligence is continuing across a financing process involving multiple parties. Carbios has not supplied a replacement financial close date or revised production timetable, leaving the plant later than the start in the first half of 2028 previously indicated.
The company is due to provide another update with its half-year results on 24 September. That disclosure should show whether the credit approvals have progressed into binding commitments and whether the remaining reviews can be completed without another material change to the construction programme.
Commercial scale remains the test
Longlaville is intended to become Carbios’ first commercial-scale plant for its enzymatic PET recycling process, with planned annual capacity to treat 50,000 tonnes of PET waste. The technology breaks the polymer into its constituent monomers, which can then be purified and used to make new PET rather than being restricted to lower-value applications.
The process has direct relevance to food and beverage packaging because PET remains widely used for bottles, trays, and other formats where material quality, food-contact compliance, and consistent processing performance are critical. Carbios has worked with groups including Nestlé Waters, PepsiCo, Suntory Beverage & Food Europe, and L’Oréal, creating a prospective route from difficult PET waste back into high-quality material streams.
Longlaville must now prove that the process can be financed, built, supplied with suitable feedstock, and operated continuously at industrial scale. Demonstration results and licensing agreements can establish technical credibility, but they do not remove the capital, commissioning, and market risks attached to a first commercial facility.
Carbios said in July that its Clermont-Ferrand demonstration plant had completed 100 production batches, expanding the operating record behind the technology and supporting a broader licensing offer. Lenders still have to assess construction interfaces, ramp-up assumptions, feedstock contracts, product sales, and the additional cash required if commissioning takes longer than planned.
The company previously described a financing structure combining private debt and equity with €42.5 million of confirmed public support. Bank credit committee approvals mark progress, but they are not equivalent to financial close while lenders and other stakeholders continue reviewing the technology, construction plan, feedstock, offtake arrangements, and execution risks.
The plant’s economics will also depend on the value customers place on recycled material produced from waste that is poorly suited to mechanical recycling. Premium pricing may support the first facilities, but commercial replication will require the process to compete against virgin PET, mechanically recycled resin, and other depolymerisation routes while carrying the cost of feedstock preparation, utilities, purification, and quality assurance.
Packaging buyers face a longer wait
The delay defers a prospective source of recycled PET intended to handle material that can be difficult for conventional mechanical processes. Coloured, multilayer, contaminated, and textile-derived PET streams are among the fractions frequently cited as potential feedstock for depolymerisation technologies.
Packaging buyers will have to keep separating proven supply from planned capacity when setting recycled content strategies. Mechanical recycling remains the established route for bottle-to-bottle PET at scale, while chemical and biological processes still have to demonstrate reliable economics, energy demand, yield, product quality, and continuous operation through full industrial cycles.
European packaging rules are increasing pressure on producers to document recyclability, recycled content, and material performance. Additional recycling capacity could support those requirements, but planned tonnes cannot be treated as available tonnes until a plant is financed, constructed, commissioned, and qualified by customers.
Longlaville’s importance extends beyond its 50,000-tonne nameplate capacity. A successful facility would provide a reference for licensing, project finance, and customer approval elsewhere; a prolonged delay would make future partners more cautious about construction assumptions and the speed at which equivalent capacity can be replicated.
Carbios continues to describe itself as committed to the project, and the existing bank approvals show that financing work is continuing. The company has nevertheless missed another timetable attached to a plant that has already undergone schedule changes, while the absence of a revised date leaves converters and brand owners without a dependable supply horizon.
The next decisive milestone is completion of a finance package that allows construction and commissioning decisions to proceed. Until then, Longlaville remains an important industrial project with a start date that is still moving.