Intermunicipal wastewater association EBBV (Basse-Broye/Vully) has issued a tender for a biomethane upgrading system to process sewage sludge biogas and inject it into the Swiss gas grid.

The tender features a mandatory option for biogenic CO2 recovery, purification, and liquefaction, reflecting a broader European shift toward capturing non-methane streams for utilization.

Switzerland’s biomethane sector is expanding toward 50 grid-connected plants, driven by transition from electricity generation to biomethane injection against an estimated regional potential of 4-6 TWh per year.

Swiss intermunicipal wastewater association EBBV (Basse-Broye/Vully) has launched a public procurement tender for a complete biogas upgrading facility to process gas generated from sewage sludge digestion and inject the resulting biomethane into the domestic distribution network.

Alongside standard membrane upgrading and grid-injection infrastructure, the tender includes a mandatory option to capture, purify, and liquefy the biogenic CO2 stream separated during the process.

The inclusion of CO2 liquefaction points to an evolving standard across European upgrading projects, where developers are increasingly monetizing biogenic carbon dioxide for industrial or food-grade applications rather than venting it as a byproduct.

The contract presents immediate commercial opportunities for process engineering firms specialized in membrane separation, gas purification, CO2 liquefaction, and thermal integration.

While smaller than neighboring European markets, Switzerland’s biomethane sector is expanding steadily as existing biogas assets transition away from power generation toward direct gas grid injection.

Grid Connectivity: Switzerland is approaching 50 operational biomethane installations linked directly to the gas grid.

Unmapped Capacity: National biogas potential is estimated at 4 to 6 TWh per year, leaving significant headroom above current utilization rates.

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