From seven to one: WWTP consolidation

The new L'Eparse regional wastewater treatment plant, is being built in Payerne to replace seven existing plants. With a capacity of 42,000 population equivalents, it will treat the wastewater from 16 municipalities in the cantons of Vaud and Fribourg.

While meeting the wastewater treatment needs of the entire region, the new plant will significantly improve water protection. The biological treatment of the wastewater will use an alternating/intermittent nitrification/denitrification (A/I) process that anticipates future nitrogen discharge standards and reduces electricity consumption. Micro-pollutants will be removed by activated carbon filters.

Visualisation: © Brülhart Ducret

Our tasks

HOLINGER AG has been commissioned as general planner for the construction of the new wastewater treatment plant. The mandate includes all SIA phases, from the revision of the preliminary study to the commissioning of the plant and involves:

  • Complete design of the new WWTP
  • Coordination with the district heating plant planned on the same site
  • Design of electromechanical equipment for 9 pumping stations
  • Collaboration on the GDP of the Association in the areas of network modelling and watercourse investigation (module G)

Project team

Philippe Häller

Overall project manager

Arnaud Kolzer

Project engineer WWTP/Pump Systems

Adrien Blatter

Project Manager Construction

Oriane Etter

Project Manager GDP