In addition to building silos for bulk materials, BSP supplies tanks and reservoirs for the storage of sewage, such as tanning and slurry.

In order to improve the biogas production in digesters a pre-treating process for cleaning slurry from sands and other impurities is required.

Since the suspension is rather aggressive and can attack concrete silos and similar, BSP offers solutions for storing the stainless steel suspension for both open and closed tanks.

The stainless steel tank is equipped with a large vertical mixer that keeps the solid part of the sludge in suspension.

On the bottom it is installed a special BSP watertight planetary extractor with inox screw, that allows the extraction of sands & impurities once deposited on the bottom of the silo

BSP sewage pre-treatment tanks are particularly used for the storage of pig slurry and cattle.