Types of filters Anthracite, Silica, Volcanic Rock and Garnet
Filter products for water treatment
How is the filtration of solids in suspension carried out?
How filter products work?
The selection of raw materials that comply with the strict law in force, requires in-depth knowledge and this is our specialty.
The apertures at the bottom of the filter can often become blocked with fine filter products and it is therefore sometimes necessary to protect them with a layer of support gravel. The coarse gravel forms a barrier between the filtering medium and the openings eliminating the risk of obstructing them.
Garnet is a high-density alumina silicate, rich in iron, also known as almandite Fe3Al2 (SiO4) 3. It is installed in thin layers (100-200mm) under the bed of sand and is used to retain very fine particles that have managed to pass through the silica bed. The granulometric size of this garnet may be slightly finer than the particle size of the silica but due to its higher density, the fine garnet will not rise through the silica bed during back-washes.