SNF Floerger

Polymers for Environmental Dredging

SNF’ s polymers are widely used in municipal and industrial wastewater treatment plants and also by dredging contractors for enhanced solid/liquid separation.

Thickening of dredged sediments to obtain a clear overflow.
- Polymer injected directly in hopper dredgers
- In settlement ponds : instead of using two or three successive settlement ponds, the addition of polymers decreases the settlement time. The overflow is clear after the first pond, saving land area and civil engineering work.

Dewatering of thickened sludge with either geo-textile tubes, centrifuges, belt filter presses or screw presses. Polymers have proved to be very efficient in the dewatering of sludge from municipal and industrial lagoons, ponds, lake clean-out projects, waterways, harbours and ship canals.

Port Construction. SNF’s proposal is a change from the traditional lagooning process. After many years of natural drying, the soil is heterogeneous. Polymers, on the other hand, give homogenous flocs made of sand and slime, which after only 6 months of drying leave a valuable land. Our process means that less land area is consumed by settling areas and land is usable after 6 months. It is a cost-effective way to sort out the problems, as there is no capital investment and our process is less expensive to operate than conventional disposal on a total cost basis. Furthermore, in the case of contaminated sediment, the polymer is able to enhance the attachment of the contaminants to the large flocculated sediment particles, thus leaving a cleaner sediment behind.




Your Solution for Environmental Dredging

SNF SAS - ZAC de Milieux - F42163 - Andrézieux - FRANCE - Phone: +33 477 36 86 00 - Fax: +33 477 36 86 96 - email: dredging@snf.fr