Veolia builds new drinking water plant in Switzerland

With the combination of advanced technologies in Europe, the plant will produce water that exceeds regulatory requirements.

The Service de I’eau de Lausanne (Lausanne Water Service) and Veolia, through its subsidiary OTV Switzerland, representing a consortium formed by OTV Switzerland, Amics and IDEM Suisse, signed a contract worth CHF44.8 million for the design, supply, construction and commissioning of equipment for the new Saint-Sulpice II drinking water production plant which will feature an innovative and scalable multi-barrier process.

The Municipality of Lausanne has set itself the objective of producing water of quality in terms of turbidity, microbiology, and micropollutants. In operation since 1971, the current facility has aged and is no longer in line with recent technological developments. After carrying out several tests and piloting various processes, in particular with Veolia, to review all available technologies, the Lausanne Water Service selected a multi-barrier process.

With a nominal production capacity of over 100,000m3 per day, the plant will provide between 30 and 50% of the drinking water demand of the 380,000 inhabitants of the Lausanne region for 20 years. After obtaining the building permit, to be issued by the Canton of Vaud at the start of 2022, work should begin in 2023 with a first part commissioned in 2026. The entire plant should be completed in 2027-2028.

The production of drinking water will be ensured by a multi-barrier system composed of a treatment core featuring advanced oxidation, adsorption by activated carbon and ultrafiltration membranes. In addition, approximately 10-15% of the flow will be treated by nanofiltration to improve overall micropollutant removal.

Arnaud Valleteau de Moulliac, executive vice-president Europe for Veolia Water Technologies, said: “The elimination of micropollutants and endocrine disruptors is an important issue; finding effective and sustainable solutions to address it is an integral part of Veolia’s ecological transformation process. The technological combination that we have offered to the Lausanne Water Service represents the best solution to meet water quality and public health objectives while controlling energy costs.”