Drinking water for millions in Paris

When a Parisian turns on the tap, water quickly gushes out which is ready to drink. But before the water reaches the end users, a lot has been done to purify it. And that’s important, because much of it is surface water from the Seine.

Since 1923, SEDIF (Syndicat des Eaux d’Ile-de-France) has been responsible for purifying the water pumped out to consumers, and making it fit to drink. Something happened recently at the treatment plant in Choisy-le-Roi in Paris which made the purification work a bit easier: An updated version of Selcoperm from Grundfos was installed.

“It is very important that the chlorination for the drinking water system and production is reliable. We have used this system before and seen that it works well and minimises the risk,” explains Anne-Laure Colon, Operational Manager at SEDIF.

Reliable and efficient
In addition to being very reliable, the updated system sets new standards for energy efficiency. It actually uses 25 per cent less energy than its predecessor, due in part to the development of new and more efficient electrolysis technology.

It is also easy to integrate the system with other systems from Grundfos, and thus get Selcoperm and the dose metering pumps to perform optimally.And for Veolia, the company responsible for operating the water treatment plant in Choisy-le-Roi, optimal operation is vitally important. The company has therefore also entered into a service agreement with Grundfos.

This is something Veolia’s Operations Manager, Laurent Trochu, is particularly looking forward to:

“We will learn from our collaboration with Grundfos, and profit from having such a reliable and productive system with a long lifetime,” says Laurent Trochu.

“There is productive experience sharing and we have a strong partnership.”

Adapted to the customer’s needs
However, this is not the only benefit resulting from the partnership and the new system. The chlorine used in the treatment process is produced using a water solution containing normal salt, which electric current passes through, which makes the system safer than other known chlorinebased disinfection methods.

The system is also scalable. This means it can be easily adapted to the customer’s individual needs for treated water.

“Supplying this system is also a matter of us being able to understand our partners’ needs. The solution is reliable, safe and versatile, which makes it well suited for the job at hand. The needs of collaboration partners such as SEDIF and Veolia make us stay on our toes, and we are pleased to play our part in making their businesses flow easier,” says Laurent Masson, Sales Engineer at Grundfos France.

The water treatment plant in Choisy-le-Roi supplies clean drinking water to around 1.84 million residents in 49 of Paris’ southern districts.