# Stereau and Enosis partner to integrate biological methanation into wastewater treatment plants

Stereau, a Saur subsidiary, and Enosis signed a strategic partnership to develop and deploy solutions for recovering CO₂ from sludge digestion in wastewater treatment plants, including a pilot unit.

- Type: Partnership
- Announced: 2025-11-19
- Where: France and Switzerland, France
- Status: announced
- Products: biological methanation solutions for CO₂ recovery
- Sectors: [Water Treatment Equipment](https://endata.com/sectors/water-treatment-equipment.md)

## Companies

- [Stereau](https://endata.com/companies/33189.md)
- [Saur](https://endata.com/companies/5831.md) (partner)
- [Stereau](https://endata.com/companies/33189.md) (partner)
- [BKT](https://endata.com/companies/34840.md) (partner)
- [Tomorrow Water](https://endata.com/companies/40067.md) (partner)
- [Enosis](https://endata.com/companies/88550.md) (partner)

## Sources

- [saur.com](https://www.saur.com/en/newsroom/stereau-and-enosis-join-forces-to-integrate-biological-methanation-into-the-wastewater-treatment-plants-of-tomorrow/), 2025-11-19: "Stereau and Enosis announced the signing of a strategic partnership to develop and deploy solutions for recovering CO₂ from sludge digestion."
- [environmental-expert.com](https://www.environmental-expert.com/news/tomorrow-water-bkt-and-stereau-saur-group-join-forces-to-deploy-the-proteus-biofiltration-process-in-1185906), 2025-11-20: "Tomorrow Water/BKT partners with Stereau, the engineering subsidiary of the Saur Group, to offer the French and Swiss markets an innovative and internationally proven solution for urban wastewater treatment: the Proteus™ process."

---
Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.