Ozone (O3) is an unstable molecule that rapidly reverts to oxygen (O2) and has a half life of about 20 minutes in clean water at 20oC. It is an extremely powerful disinfectant and sanitiser, approximately 20 times more powerful than chlorine and extremely faster acting. Ozone in solution acts as a homogeneous disinfectant and is effective in turbid water conditions unlike UV systems. Ozone improves the taste and odour of water and, after treatment, water is typically colourless, odourless, oxygenated, safer to drink and more palatable than chlorinated water.
Ozone has the highest oxidation potential of all disinfectants and is known to rapidly kill all pathogens including bacteria, viruses, moulds, fungi, protozoan cysts and algae. No organism can resist, or develop resistance to ozone by virtue of its reactivity. Ozone is known to breakdown and rupture cell walls of bacteria and the protein shells of viruses as well as their genetic material and also pyrogens. Only hydroxyl radicals (HO•) have a higher oxidising potential than ozone and these radicals are also produced in DiaZone cells.
Chlorine based disinfectants, unlike ozone, are known to produce undesirable disinfection by-products” (DBP) such as Trihalomethanes (THMs), Haloaceticacids (HAAs) and other organochlorine compounds. These substances are known carcinogens.
After a short time, ozone simply reverts to oxygen, leaving behind no residues. Whilst chlorine produces a longer lasting residual in the water, ozone is substantially more powerful and even destroys protozoan cysts, such as Cryptosporidium, that remain untouched by chlorine.
In gaseous form, ozone is a respiratory irritant for which there are guidelines laid down for both short and long term exposures. Whereas, there are no defined exposure limits for ozone in solution. It should be noted that the concentration of ozone dissolved water required for disinfection is extremely low, typically ten times less than chlorine. In practice, only 50 parts per billion (ppb) is typically required.
Ozone has been used in municipal water treatment plants for over a hundred years and is extensively used in water bottling factories to sanitise both water and bottles. Ozonated water is also used for sanitising food and surfaces in contact with food.
DiaZone cells generate ozone directly from water by electrolytic process. In this case, ozone goes directly into solution where it acts as a powerful oxidant, disinfectant and sanitiser. There are no moving parts in electrolytic cells and no chemicals are required. DiaZone systems operate at low current and low voltage, typically 24V DC. These cells are intrinsically safe, economical and green.