With the award of the contract to renovate the Méry-sur-Oise drinking water production plant decanting unit for SEDIF as part of a consortium alongside SETHA.
Since the changes made to the terms of SEDIF’s service delegation contracts, drinking water plant contracts had become few and far between for the Greater Paris Regional Division. But that doesn’t mean it’s lost its touch, and it’s now back with a bang with this valuable contract won by the Argenteuil Agency.
The contract in brief
As head of the consortium, SADE won Package 2, along with its partners SETHA and INEO (ENGIE’s electrical engineering subsidiary). It covers hydraulic equipment, electricity, processes, ventilation and automation.
The works, which will last 39 months, are set to begin next spring following the preparatory phase, and will include:
- Replacement of the treatment equipment (100% SADE): 3 identical decanters and 4 primary agitators and 4 secondary agitators each, one of which also includes 4 sludge removal scrapers.
- Replacement of the decantation unit’s decanted water and discharge pipes (50% SADE – 50% SETHA)
The works will be carried out in phases to guarantee service continuity, as the plant cannot be fully shut down for this length of time. To ensure everything goes smoothly, the decanters will be shut down section by section and the operator will painstakingly lock and tag out each section for a precise, firm period.
Replacing the equipment (including the agitators and scrapers) will be particularly tough. Its handling will require the existing equipment to be removed, working to a precise schedule. The material and pipes will be transported via the roof, requiring special machinery.