METHOD OF CLEANING NATURAL WATER Russian patent published in 1997 - IPC

FIELD: water treatment. SUBSTANCE: invention relates to treating natural water for household-drinking purposes and can be used in water-supply systems of towns, inhabited localities, and various industrial enterprises. Method includes oxidative-disinfecting treatment, coagulation, clarification, and filtration. Oxidative-disinfecting treatment is carried out using anolyte produced in anode chamber of vertical electrolyzer with coaxial cylindrical insoluble electrodes and ceramic diaphragm when treating sodium chloride aqueous solution in concentration 1-3 g/l to achieve pH 5-7 and redox potential from +10 to +800 mV against Ag/AgCl reference electrode, volume of introduced solution constituting 0.01- 1.0% of volume of water being treated. Coagulation process may be performed using flocculants. If necessary (when treating strongly polluted water), after filtration, treated solution with the same characteristics and in the same amount is added. Initial sodium chloride solution is prepared using cleaned water, which is also introduced into cathode chamber of diaphragm electrolyzer and catholyte is used in coagulation stage. EFFECT: enhanced efficiency of process. 4 cl, 2 dwg