Modernisation of the water plant in Choisy-le-Roi

Project management for the renovation of four settling tanks at a water treatment plant

The services entrusted to Egis consist of upgrading the settling unit at the Choisy-le-Roi water plant, one of the largest drinking water plants in the world, which provides 340,000 m3 of water daily to 1.85 million people in the southern Parisian suburbs.
Date : January 2012 to December 2015
Duration: 48 mois
Client: Syndicat des Eaux d’Ile de France (SEDIF)
Funding: SEDIF

Project overview

As part of a call-off contract, SEDIF has entrusted Egis with the project management for upgrading the plant's settling tanks.

Renovating the four multi-channel settling tanks involves replacing/improving hydraulic equipment, repairing structural engineering and finishings, and upgrading electricity and robotics. Egis worked on the pre-project phases, provided assistance with execution of the works contract and assistance with operational acceptance.

Egis is also responsible for approving the compliance of studies.

Our missions

The full project management role consists of upgrading the four settling tanks on three main points:

  • hydraulic equipment (improving the sludge scraper system, replacing the flocculators' primary and secondary agitators, manifolds, valves and pumps),
  • structural engineering and finishing work (repairing terraces, concrete structures, handrails and renovating the exterior siding),
  • electricity (compliance of electrical installations, replacing the controller, renewing lighting and autonomous emergency lighting blocks).

© Laurent Julvez, Egis