Chlorination is probably the most common method of treating microorganisms in water. This method is mainly used by water utility companies in order to kill microorganisms in water right from the water production site up to the consumers water tap.
Water disinfection with chlorine dioxide is a very efficient and gentle way of fighting legionella bacteria and all kinds of micro organisms in water such as viruses, parasites and fungus spores.
COD (Chemical Oxygen Demand)
Chemical oxygen demand is a measure of the total quantity of oxygen required to oxidize all organic material (biologically available, inert organic matter) into carbon dioxide and water, and oxidisable inorganic matter.