BUPOLSA Sludge Thickeners/Decanters are made of glass-fibre reinforced polyester (GRP) and are recommended for urban and industrial wastewater treatment. This is where sludge concentration and thickening processes take place, as well as the decantation and reduction of solids produced by the physical sedimentation of the decantable products present in the wastewater. The separation of these sludges reduces the operating costs of the treatment plant.

The Thompson type sludge decanters are designed to facilitate the sedimentation processes by gravity of the sludge.