METHOD OF WATER DISINFECTION USING OZONE AND SILVER IONS Russian patent published in 2002 - IPC

FIELD: technology of water treatment. SUBSTANCE: invention relates to methods of complex water treatment by oxidation by means of ozonization and with heavy metal ions, in part, silver ions. Invention can be used for disinfection of drinking water in water supply systems of towns and other settlements and for disinfection of reservoir return water. Method of water disinfection involves its treatment with ozone and silver ions being the treatment is carried out for some stages. At the first stage ozone is added to water up to its concentration in water 0.5-1 mg/l; at the second stage the ozonized water is treatment with silver ions in concentration 0.005-0.01 mg/l obtained by electrolyzer using being anode and cathode of the latter have 99 wt.-% and in periodical change of electrodes polarity. Preferably, ozonization is carried out at water temperature 10-20 C and electrolysis at 20-30 C and pH = 6.5- 8.5. Invention provides the optimal schedule of reagents dosing, prevention of the possibility of the secondary bacterial water infection for the prolonged time (for a month, not less). EFFECT: enhanced effectiveness and quality of water treatment, decreased consumption of disinfecting agents. 4 cl, 1 tbl, 2 ex