Underground MBR for ski tourism region, largest MBR plant in Switzerland. Rehabilitation and upgrade of existing WWTP to more stringent effluent standards and for dealing with tourism-related peak loads ranging between 6,000 and 60,000 PE. The complete plant is housed in mountain caverns at a depth of up to 200m.

Project Highlights

• Mechanical pre-treatment
• Wastewater lifting
• Coagulation
• Primary sedimentation
• Fine screen
• Membrane filtration in separate basin
• Neutralisation
• Phosphorus elimination by pre and simultaneous precipitation