The Association Intercommunale pour l’Épuration des Eaux Usées de la Côte (APEC) is planning to build a new wastewater treatment plant on the Lavasson site in the commune of Gland. The current WWTP has reached maximum capacity and is no longer capable of handling future load increases. The new 70,000 p.e. WWTP will improve water protection by treating the nitrogen and micropollutants that are currently lacking.

The WWTP is organized around five units (administration building, pre-treatment building with primary decantation, biological basins with secondary decantation, micropollutant treatment and sludge treatment building).

Construction of the WWTP will require an excavation 4 to 5 m deep, with an excavation volume of 40,000 m3. Part of the excavated material will be reused for backfill.

The basins and underground structures will be made of reinforced and prestressed watertight concrete. The watertightness of the concrete structures must be guaranteed from the inside for the basins and from the outside, since the buried structures will be subjected to a water pressure of around 1m. The load-bearing structure of the administration building and the above-ground load-bearing structures of the other buildings will be made of wood, mostly from very local sources, as some APEC member municipalities have forest areas capable of supplying construction timber.

The project is being developed in BIM in collaboration with the various partners in the consortium (equipment engineer, civil engineer, CVS, MCRCE) as well as the architect and landscape architect.