The greensand process has been used effectively to remove iron, manganese, and hydrogen sulfide from Raw Water. They can operate at a wider pH range than an aeration tower. Greensand is an organic fertilizer that contains mineral called “glauconite”. The glauconite is first stabilized then coated with manganese oxide. This coating provides the glauconite with its special chemical oxidation-reduction properties for the removal of iron and manganese, as well as small quantities of hydrogen sulfide.
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