- Manganese Greensand forms from glauconite green sand.
- When water chemistry is within certain parameters it is capable of reducing iron, manganese and hydrogen sulfide from water through the process of oxidation and filtration.
- Soluble iron and manganese oxidizes and precipitates through contact with higher oxides of manganese on the greensand granules.
- The hydrogen sulfide is reduced by oxidation to an insoluble sulfur precipitate.
- Backwashing filters and removes precipitates. When the oxidizing capacity power of the Manganese Greensand bed exhausts, the bed has to be regenerated with a weak potassium permanganate solution, thus restoring the oxidizing capacity of the bed.
- One to two ounces of potassium permanganate, in solution, per cubic foot of Manganese Greensand is considered sufficient for normal regeneration.
- Vigorous backwash and regenerating the bed is required when placed in service, and before its oxidation capacity is totally exhausted.
- Operating the bed after oxidation capacity is exhausted will reduce its service life and may cause staining.
- An odor oxidizer removes sulfur odor by converting Hydrogen Sulfide into water and precipitated sulfur compounds.
- The unit uses a booster pump and contact tank, sometimes two of each, if sulfur levels are very high, or if high flow rates are expected.
- The unit is very reliable, requires no regeneration, and no chemicals to purchase.
- Twice a year simply open a drain valve to flush out any sediment. An added bonus is the extra water pressure to the house from the booster pump!!
- Basically, once installed you can forget about it!
- As water enters the system, it passes through a bubble of compressed air that adds oxygen to it.
- The water then passes through a filter bed.
- The filter material enhances a reaction that separates the iron from the water.
- The insoluble flakes of iron that result are then caught by the filter bed.
- The iron-free water then flows to your faucets.
- The system replenishes itself every one-to- three days in a process that washes the iron out from the filter and down the drain, while refilling the compressed air bubble (this happens automatically during the night.)
- The filter media, which is Manganese Dioxide based, catalyses’ a reaction that turns ferrous iron, usually found in water in the form of ferrous bicarbonate, into ferric oxide and ferric hydroxide, which are insoluble.
- This is the same reaction that takes place when iron-bearing water is exposed to air, which leads to staining of fixtures.