Case Story Norway

From anaerobic wastewater treatment to resource factory – VEAS

Norway’s largest wastewater treatment plant pioneers BECCS

March 2026

Summary

Veas is a publicly owned inter-municipal company responsible for the treatment of wastewater from approx. 650,000 inhabitants and businesses in the Oslo region, equivalent to the wastewater generated by approximately 800,000 people. Located on the western side of the Oslofjord, it is Norway’s largest wastewater treatment facility and is jointly owned by the municipalities of Oslo, Bærum and Asker.

Established in 1976, with operations starting in 1982, Veas was founded with the objective of improving water quality in the Oslofjord by removing organic matter and nutrients from municipal wastewater before releasing it in the Oslofjord. The plant has been under continuous development and remains a pioneering plant today, with a strong focus on societal benefits and sustainability. In 2024, 79 percent of nitrogen and 92 percent of phosphorus was removed. In addition to wastewater treatment, the facility recovers energy in the form of heat and biogas, produces fertilizer and soil improver from sewage sludge, and captures biogenic CO2 from its biogas upgrading process.