French biofuels startup Sublime Energie is pushing a new approach to cutting methane emissions from livestock, targeting smaller farms often left out of existing clean-energy systems.

Founded in 2019 from research at Mines Paris–PSL, the company recently launched its demonstrator plant “Charlie” in Brittany, France, on April 14, 2026. The facility is described as the first to liquefy biogas directly on a farm using anaerobic digestion.

The system produces renewable fuel on-site without requiring access to a gas grid, a major barrier for rural producers.

The company’s model is inspired by milk collection networks, where biogas is gathered, densified, and transported from multiple farms to a central hub.

It converts farm waste into biomethane for bioLNG and extracts bioCO₂ for use in agriculture and industry as a replacement for fossil CO₂.

Methane emissions from livestock remain a major climate concern because methane is roughly 80 times more potent than CO₂ over a short timeframe.

While large farms already use anaerobic digestion for energy, smaller operations often cannot afford the infrastructure required for purification and compression.

As a result, much of the methane from manure is still released into the atmosphere.

Sublime Energie says its breakthrough lies in a proprietary solvent system that allows methane and CO₂ to be liquefied together without forming blockages in equipment.

The resulting liquid mix is transported by tanker to regional hubs, where bioLNG and bioCO₂ are separated for commercial use.

The solvent is then recovered and returned to farms for reuse, creating a closed-loop system designed to improve efficiency and lower costs.

The company says the goal is to make farm-based biogas commercially viable at scale, particularly for small and mid-sized agricultural producers.