CALCITE ADVANTAGES
•Naturally occurring material
•Low uniformity coefficient for
maximum contact for controlled pH
correction
•Slower reacting for controlled pH
correction
•Inexpensive
PHYSICAL PROPERTIES
•Color: Near white
•Bulk Density: 90 lbs./cu. ft.
•Mesh Size: 16 x 40
•Specific Gravity: 2.7
•Effective Size: 0.4 mm
•Uniformity Coefficient: 1.5
•Hardness: 3.0 (Mohs scale)
•Composition: CaCO3, 95% min.
MgCO3, 3.0% max.
CONDITIONS FOR OPERATION
•A gravel support bed is recommended
•Water pH range: 5.0-7.0
•Bed depth: 24-30 in.
•Freeboard: 50% of bed depth (min.)
•Backwash rate: 8-12 gpm/sq. ft.
•Backwash Bed Expansion: 35% of
bed depth
•Service flow rate: 3-6 gpm/sq. ft. but
may be modified to adapt to local
conditions
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Calcite is a crushed and screened white marble media which can inexpensively be used to neutralize acidic or low pH waters to a
neutral, less corrosive effluent.
Calcite is a naturally occurring calcium
carbonate media. One of the advantages
of Calcite is its self-limiting property.
When properly applied, it corrects pH
only enough to reach a non-corrosive
equilibrium. It does not overcorrect under
normal conditions. Upon contact with
Calcite, acidic waters slowly dissolve the
calcium carbonate to raise the pH which
reduces the potential leaching of copper,
lead and other metals found in typical
plumbing systems. Periodic backwashing
will prevent packing, reclassify the bed
and maintain high service rates. Depending
on pH, water chemistry and service
flow, the Calcite bed will have to be
periodically replenished as the Calcite is
depleted.
As the Calcite’s calcium carbonate
neutralizes the water, it will increase
hardness and a softener may become
necessary after the neutralizing filter.
Calcite can be effectively combined
with Clack Corosex to combine the high
flow neutralization properties of Corosex,
along with the slower reacting low flow
properties of Calcite, increasing the
ability to correct low pH. |
