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Dual Media Filter
The Dual Media Filter works on the principal of depth filtration. The principal media in these filters are quartz, graded sand and anthracite. Other supporting media include pebbles of various sizes, crushed gravel and silex. The major advantage of this type of filters is that anthracite which provides for coarse filtration and is lighter than filtering sand. Hence one stage of coarse filtration takes place on the anthracite bed and the next stage takes place on the sand bed. Thus depth filtration is achieved.
The salient features of SBT make Dual Media Filters are
- Pre-engineered, pre-assembled and Compatible to succeeding and preceding units
- Flexibility in selection of velocities, makes, material of construction etc. as per the requirement.
- Dirt loading capacity is higher on account of dual media - sand and anthracite
- Can be back-washed with inlet water up to turbidity of 25 NTU