Clearing sludge from a retention basin - CTP environnement group

Our client needs to drain the sludge from the retention basin on its production site every year, to ensure its plant runs smoothly, while complying with the standards for discharges into the natural environment.

The basin contained 850 m³ (1 112 yd³) of mineral sludge, which was too harsh to use a conventional method, such as a centrifuge or a mobile press filter.

CTP environnement suggested pumping and dewatering this sludge using a more suitable technique of dewatering with a geotextile membrane. The very hard sludge at the bottom of the tank required the use of an appropriate power shovel.

With several geotextile membranes, measuring 120 m³(157 yd³) arranged over a specific and specially created area, the work was carried out successfully in the summer.

In the end, all the sludge was removed from the tank and the hard sludge was stored alongside the dedicated area for the dewatering membranes.

News

16th October 2025

Nomination for the WNE Innovation Awards 2025!

As part of our participation in the upcoming World Nuclear Energy Exhibition, which will take place in Villepinte from 4 to 2 November 2025, we have been nominated in the ‘To boost Nuclear Installation Performance and LTO - Small companies’ category of the WNE Innovation Awards 2025.

News

13th October 2025

A review of our participation in Pollutec 2025

A wonderful event that took place under the best of circumstances!

Participating in Pollutec means offering innovative solutions to accelerate the ecological transition and develop new markets. With 11 areas of expertise, inspiring conferences and numerous networking opportunities, these four days bring together all the technologies, solutions and equipment dedicated to the prevention and treatment of all forms of pollution, in order to preserve the environment and ensure sustainable development.

We had announced a rich programme, with targeted partners to discuss the key issues of the moment.

News

6th October 2025

WEFTEC 2025 in Chicago

We exhibited at the last Water Environment Federation's Technical Exhibition and Conference, largest annual water quality exhibition in North America. This meeting has been providing a forum for knowledge and technology exchange within the water and wastewater fields since its creation, becoming the world’s leading water quality conference.