This comprises off sand and anthracite as filtering media and polishing media respectively. Internally it is fitted with inlet distributor and a bottom collecting system. Externally, it is fitted with frontal pipe work and isolation valves. Sand is used for removing the suspended particles and anthracite removes the odor and colour etc to make the water fit for various application. Pebbles and gravels are provided to support to both the media. This filter is to be backwashed after accumulation of suspended solids, however, before carrying out the backwash, air scouring is also to be done for loosening of dirt and suspended solids. Limit for the backwash in these filers is governed by differential pressure across the filter.

Sand and anthracite is used for giving the maximum efficiency for Depth filtrations where bigger particles will settles in the anthracite layer and smaller particles are trapped in sand layer. Vessels are horizontal and vertical construction as per IS and ASME standards, Specialized designs are available for clarfier/thickner down stream applications. SHIVAM  designed distribution and collection systems to ensure proper functioning of the system and operate with maximum efficiency

Multimedia Filter Systems also known as depth filters or turbidity filters contain two or more types of media and gravel under-bedding. The gravel is used as a support to keep smaller medias out of the distribution system and to stop channeling of water. 
Our multimedia system is design for the removal of turbidity in the water caused by sand, silt, ferric iron and oxidized manganese or sulfur. They are used in applications such as chlorination filtration systems, general turbidity removal and prior to ultraviolet sterilizers or water softeners.
Different grade of sand with definite size are the specialty of these filters. These are vertical and horizontal type with specialized design of distribution and collection systems to ensure proper functioning of the system and operate with maximum efficiency. Coarse, Quartz sands are used for this and some cases Garnet is also use as the media of filtration.

Multimedia filtration is a proven design concept; the coarse media layers in the top of the tank trap large particles, and successfully smaller particles are trapped in the finer layers of media deeper in the bed. The result is a highly efficient filtering since removal takes place throughout the entire bed. Multimedia filters typically remove particles 5 to 15 microns in size or larger as opposed to a conventional single media sand filter which removes 30 micron or higher. 
We use Triple Filtration Media for maximum removal: Anthracite, Sand and Garnet.