Absorption is the tendency to condense on the surface of a solid. Absorption is the tendency to condense within a porous material. Effective size is the sieve size at which 10% of the sand passes, usually expressed in millimeters. The uniformity coefficient is the sieve size at which 60% of the sand passes divided by the effective size (size of 60% passing / effective size).
The uniformity coefficient has no units. porosity is the volume of the voids (spaces) divided by the total volume. Specific gravity Is the ratio of the mass of a given volume to that of an equal volume of another substance (usually water).
Breakthrough is the passing of turbidity, floculation and etc., through the entire filter medium.
Constant rate is a steady rate of filtration with a loss of head occurring. Stennis rate is a steady decrease in the filtration rate accompanied by a constant head loss. Loss of head (head loss) is, the total pressure drop across the filter medium. Viscosity is the resistance of water to shear stresses. The viscosity of water decreases with increasing temperature.
Types Of Water Filters
A typical design of a multimedia filter includes 4 inch of gravel 8 inch of sand and 18 inch of anthracite. The theory behind this type of filter is that most of the material will be filtered out In the coarse media with the final polishing
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