Enzymatic PET Recycling: What Packaging Buyers Should Plan For Before 2030

Enzymatic PET recycling works. It has worked in a peer-reviewed process since 2020, and demonstration bottles made from enzymatically recycled resin have existed since 2021. What does not exist is a plant that will sell you the material. If you are specifying a pack for 2027 or 2028, biologically recycled PET is not a supply you can commit to — it is a technology to track, and a clause to leave room for.

Does enzymatic PET recycling actually work?

Chemically, yes, and the evidence is specific rather than promotional. The 2020 Nature paper describing an engineered PET depolymerase reports a minimum of 90% PET depolymerisation into monomers over 10 hours, at a productivity of 16.7 grams of terephthalate per litre per hour.

The reason that matters to a packaging buyer is not the enzyme, it is what comes out. Mechanical recycling melts and reprocesses the polymer, and the same paper notes that thermomechanical recycling costs the material some of its mechanical properties, which is why mechanically recycled PET is usually blended down and why colour and contamination limit what you can put in. Depolymerisation goes further back: the polymer is broken into its building blocks, purified, and repolymerised. Coloured bottles, thermoformed trays and polyester textiles all become viable feedstock, and the resin at the far end is chemically the same material as virgin PET rather than a compromised version of it.

When can you actually buy enzymatically recycled PET?

This is where the answer changed this year. The reference project is Carbios' plant at Longlaville in France. In a March 2026 update, the company confirmed a target of starting production by H1 2028, against an estimated construction cost of €230 million.

The financing was never fully closed. That same update put the confirmed and contractually secured public funding at €42.5 million, with the balance to come from bank debt and equity partners, and the company's own cash position at around €60 million at the end of December 2025.

Then, in August 2026, Carbios told the market that its target of reaching financial close by September 30, 2026 would not be met, and described the H1 2028 production start as the previously expected timeline. Several banking partners have cleared their credit committees; the due diligence is not finished. No replacement date has been published.

In our view, that is the whole story for procurement purposes. A first-of-its-kind plant that has not reached financial close does not have a schedule, it has an intention. The usual rule of thumb applies: treat announced start-up dates for first commercial plants as the earliest possible date, not the expected one, and do not let a pack redesign depend on one.

Would regulators let it touch food?

Probably, eventually, but not automatically — and not as a category. The FDA reviews each proposed use of recycled plastic in food packaging case by case, and issues informal advice on whether a specific recycling process is expected to produce post-consumer material of suitable purity for food contact. The clearance attaches to the process, not to the technology family.

Depolymerisation should be a comparatively easy case to argue, because breaking the polymer down to monomer and purifying it addresses the contaminant-carryover question directly. That is our reading of the criteria rather than a decision anyone has published for a commercial enzymatic plant. If a supplier offers you enzymatically recycled resin for a food or beverage pack, the question to ask is which specific process holds the letter — not whether the chemistry is capable in principle.

What should you specify in the meantime?

Mechanically recycled PET, and less of it than you would like. The binding constraint is not reprocessing capacity, it is collection: the EPA put the recycling rate for PET bottles and jars at 29.1 percent in 2018, the most recent year in its material-specific data. Roughly seven bottles in ten never enter the system at all, and no recycling chemistry recovers a bottle that went to landfill.

So the practical moves are the unglamorous ones. Get your recycled-content pricing and mandate exposure straight — our guide to what PCR plastic actually costs and where the law now requires it covers the current position. Then make sure the pack itself survives whichever route matures, which is mostly a design question: the rules in design for recycling and the case for mono-material structures both hold regardless of whether the resin is reclaimed mechanically or biologically.

How do you write this into a plan without betting on it?

Four things, in order of how much trouble they save:

1. Keep enzymatic rPET out of committed specs. Name it as an alternate material in a redesign brief if you like, but do not build a launch, a claim or a compliance filing on a resin with no commercial supplier.
2. Ask for the plant, the volume and the date. A supplier offering biologically recycled PET should be able to say which facility produces it, at what annual tonnage, and whether that facility is operating or financed. Vagueness on all three means offtake from a plant that is not built.
3. Ask which regulatory clearance covers the process. For food contact in the US that means a letter for that specific recycling process. "Food-grade" on a datasheet is a marketing word until someone gives you the reference.
4. Design so the route does not matter. A mono-material, uncoloured, label-compatible pack is easier to recycle mechanically today and easier to depolymerise later. That is the only part of this you control.

None of this is an argument that enzymatic recycling is hype. The chemistry is real and the quality argument against mechanical recycling is sound. But there is a difference between a technology that works and a material you can buy, and the gap between those two is currently measured in construction financing rather than in science. Plan for the material you can order this quarter, and keep watching the one you cannot.