Wastewater Management and Project

CERN accelerators and Experiments require a cumulative cooling power of more than 400 MW. This primary cooling is carried out by means of open wet cooling tow-ers, consuming and rejecting a substantial quantity of water. In close collaboration with Swiss and French authorities, CERN implemented solutions to improve the quality of rejection and to reduce the impact of the water treatment on the environment. The deployment of these solutions was planned over several years and is ongoing. Long Shutdown provided opportunities to achieve part of the work on CERN’s Meyrin site. 2021 was a full run year of operation for LHC injectors, accelerators, and experimental areas, allowing data collection and performance confirmation of these solutions. The author will present the main technical aspects of the above-mentioned solutions, the results achieved so far and the implementation planning for the coming years.