Iron Filters and Sulfur Filters

August 19, 2019 - Nathan Olszak

Iron Filters and Sulfur Filters

Does your current water system fail in filtering out excess iron or sulfur? Perhaps your water filtration system would benefit from GreensandPlus, a black filter media used for removing iron, sulfur, manganese, arsenic, and radium from groundwater supplies. Unlike other media, there is no need for extensive preconditioning of filter media or lengthy startup periods, during which water quality standards may not be met.  Filtration systems can be designed to your exact needs, using either vertical or horizontal pressure filters, as well as gravity filters.

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Iron Filters

GreensandPlus using Catalytic Oxidation (CO) is the recommended operation when iron removal is the main objective in well waters. This method involves the feeding of a predetermined amount of chlorine directly to the raw water before the GreensandPlus filter. Chlorine should be fed as far upstream of the filter as possible (at least 10-20 seconds) to insure adequate contact time. A free chlorine residual carried through the filter will maintain GreensandPlus in a continuously regenerated condition.

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Sulfur Filters

GreensandPlus is a performance media for water filtration, including sulfur filtration. The manganese dioxide coated surface of GreensandPlus acts as a catalyst in the oxidation reduction reaction of iron and manganese. The silica sand core of GreensandPlus allows it to withstand waters that are low in silica, TDS and hardness without breakdown. GreensandPlus is even effective at higher operating temperatures and higher differential pressures than standard manganese greensand. The tolerance to higher differential pressure can provide for longer run times between backwashes and a greater margin of safety.

Arsenic Reduction

The GreenSand process has been found to be successful in removing radium and arsenic from well water, as well. This occurs when the radium or arsenic is adsorbed onto the manganese and/or iron precipitates that form. Arsenic reduction requires iron precipitates to be present in or added to the water for removal to happen.

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Manganese Filtration

GreensandPlus is an exact replacement for manganese greensand. It can be used in CO or IR applications and requires no changes in backwash rate or times or chemical feeds. It is a proven technology for the removal of iron, manganese, hydrogen sulfide, arsenic, and radium removal.

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