3. Filtration aids

• Épaississeurs Filtration

When large volumes of very dilute suspensions need to be filtered, which would require the installation of a large-capacity filter, it is often cost-effective to thicken the suspension beforehand (static or centrifugal decanter, thickening filter, hydro), so that only a reasonably-sized filter needs to be used.

• Floculants Filtration

If the particles in the suspension are very fine, and therefore difficult to filter, it may be necessary to flocculate them before filtration. The addition of suitable flocculants to the suspension produces large flakes formed by the agglomeration of small particles. If certain precautions are taken, there is generally a marked improvement in product filterability...