Iron removal plants can be based on different filtration media,depending on the iron and manganese concentration, the oxygen level, CO2 content and hardness of the water. Plant principle: First, air is injected in order to oxidize the iron. The oxidized iron will then precipitate on a sand filter.
In ground water or tube well water presence of iron and manganese has always been a matter of concern. Presence of these elements in water does not pose a risk to human health but it can cause unpleasing taste, odor and staining, which is not accepted in most of applications in domestic use as well as commercial and industrial use; therefore, oxidation filtration often knows as iron removal process is employed to remove naturally occurring iron and manganese from water. For this complete iron and manganese removal process an iron removal filter is utilized. For domestic (home) and light applications portable iron removal filter is enough, while for commercial and industrial use large iron removing (deironing) plant is required.
The process through which iron is removed from water is known as Oxidation Filtration that involves the oxidation of the soluble forms of iron (Fe) and manganese (Mn) to their soluble forms and then removal by filtration. The oxidant chemically oxidizes the iron and manganese (forming a particle), and kills iron bacteria and any other disease-causing bacteria that may be present after that the filter removes the iron and manganese particles.