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Dual Media filter:-
Introduction:-
SHIVAM offer a wide range of dual media filters which includes Pressure Sand Filters and Activated Carbon Filters. All of our filters are used to remove humidity of the turbidity and organics, dechlorination, etc. These dual media filters have high dirt removal capacity of as the finest sand forms. Thick layer of coarse anthracite is provided along with these filters.
Basic Structure :-
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.
Working Principle:-
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.
Applications:-
Oil-wetted solids
Solid stabilized oil droplets
Biological flocs and waste water solids
Precipitates and scales
Clay and mineral particles
Fly ash
It also cock-up with existing applications of PSF and ACF.
Advantages:-
Dual media filters have high dirt removal capacity of as the finest sand forms.
Dual media filters are five times more effective in removing dirt than the pressure filters.
It also cock-up with existing benefits of PSF and ACF.