Semi-calcined dolomite filter media in accordance with EN 1017
EVERZIT® Dol is a filter media manufactured from natural dolomite (CaCO3 ⋅ MgCO3). It is primarily used for groundwater deacidification. Semi-calcined dolomite is formed by thermal decomposition which is precisely controlled to convert only the dolomite's magnesium carbonate component to magnesium oxide. The resultant filter media is significantly more reactive than e.g. pure calcium carbonate or even non-calcined natural dolomite.
EVERZIT® Dol is used in single-layer filters or dual media filters for removal of dissolved aggressive carbon dioxide. Neutralization takes place up to attainment of calcium carbonate/carbonic acid equilibrium. Besides neutralization the process also realizes increased water hardness.
Additional beneficial effects of filtration with EVERZIT® Dol include: