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.

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22nd September 2025

POLLUTEC 2025

We will soon be exhibiting at Pollutec, stand H4-B095.

A leading showcase for environmental innovation, with 45 years of expertise and 11 sectors covering all environmental issues, the exhibition highlights all the technologies, solutions and equipment dedicated to the prevention and treatment of all forms of pollution and works to preserve the environment and implement sustainable development.

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29th September 2025

ENERH2O 2025

We exhibited for the first time in the ENERH2O on September 24 & 25th, Portugal’s leading energy and water exhibition. This third edition presented the latest solutions and innovations for the management and use of these essential resources, with a focus on energy efficiency, renewable energy production, and sustainable water management.

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10th June 2025

New Logistics Hub in St-Quentin-Fallavier, France

Our Supply Chain department has moved to a new site in St-Quentin-Fallavier (38), bringing together our fleet of mobile units and water & air treatment equipment.

A new warehouse designed to support our growth and improve the working conditions of our teams.