Multi-media Filter
is used to reduce the suspended solids and colloidal
materials in the feed water. These filters contain
at least four types of filter media.
The light, coarse material is on top of the filter
bed, followed by progressive less coarse material
in the lower layers. This design permits the unit
to function as a depth filter, removing the filterable
solids throughout the depth of the filter bed.
A properly designed multimedia filter will have a
flow rate of not more than 7 gpm/ft2 of surface area,
and will have a particle cut off of 10 micron.
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