Calcium Media Neutralization Filters Information :
Is there a method of raising the feedwater pH without adding a chemical to the system ?
Use of Calcium media cartridge or media filter will raise the ph of water. This is done routinely in such situations.
Where is Calcium media used ?
Adding calcium media to water gives water alkalinity which offsets the acidity (low pH) of water caused by dissolved carbon dioxide.
Where does the carbon dioxide come from ?
Carbon dioxide in small amounts is present in all natural waters. In reverse osmosis membranes remove the alkalinity present in water but not the carbon dioxide, because it is a gas. This creates a low pH in the product water.
How much calcium media is required to neutralize the water?
Each 100 mg/l of Calcium media will neutralize 44 mg/l of carbon dioxide. So I cubic foot (about 100lbs) of Calcium media will treat about 96,800,000 mg of carbon dioxide. If water has 20 mg/l of carbon dioxide then 1 cubic foot will treat: (96,800,000 / 20) liters of water. Or 4,840,000 liters or 1,278,730 gallons of water. If the water usage is 10,000 gallons/day, then 1 cubic foot of Calcium media will last 128 days.
How long will 1 cubic foot of Calcium media last?
Follow these steps:
a. Multiply the liters of water used by amount of carbon dioxide in mg/l. Let us call this number X.
b. Divide 96,800,000 by ‘X’. This will give you the number of days 1 cubic foot of Calcium media will last.
How do calcium media filters work ?
Upon contact with calcium media, acidic waters slowly dissolve the calcium carbonate to raise the pH which reduces potential leaching of copper, lead and other metals found in typical plumbing systems.
What are the specifications for the Calcium media Filter ?
Effective media size is 0.4mm
Uniformity coefficient is 1.5
Head loss through the media (only) is approximately 0.35psi for a 30” bed at 60° F water temperature and 5 gpm/ft2
Typical service loading rates are approximately 3-6 gpm/ft2 or as applicable to the specific application
Media replacement depends upon water being treated (low pH water) but is typically in the range of 3-6 months, approximately
Backwash water from the feed (clean) is common for this type of system.
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