Sonzier, Water Treatment Plant, Lausanne, Switzerland
Client:City Lausanne, represented by eauservice Lausanne
Location:Lausanne, Switzerland
Start-up:2012 / 2013
Capacity:900 m3/h,
21,600 m3/d


Engineering, supply and commissioning of process technology for the new spring water treatment plant at Sonzier, in the French speaking part of Switzerland, near Lake Geneva. The plant consists of six pressure driven dead-end ultrafiltration lines with the distinctive feature that the ultrafiltration is operated gravimetrically.


  • Prefiltration
  • Ultrafiltration with pressurized membranes
  • Net protection


Sonzier WTP1 UF - web
Sonzier WTP 4 - Übersicht web