Deferrization, demanganization

Due to the frequent presence of iron and manganese in the rock environment, these substances naturally pass into the water. Their reduced forms are soluble and colourless. At the moment of oxidation of these substances, for instance by atmospheric oxygen, their colour changes to a rusty or black colour, and their solubility is reduced. The consequence of this is clot formation. This is manifest, for instance, in the creation of rusty deposits on the surfaces of equipment or thermal transfer surfaces.


The principle for removing these substances is their controlled oxidation (regardless of whether this is by atmospheric oxygen or an oxidation reagent) and preclusion of hydrated oxides of iron and manganese from the raw water in the form of the above-stated clots. The clots are subsequently filtered off. The deferrization and demanganization usually take place on so-called prepared fillings, which increase the effectiveness of this process through a catalytic reaction.