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.

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.

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.

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.