INTEGRATED PROCESS FOR DISINFECTING WATER Russian patent published in 2003 - IPC

FIELD: water treatment. SUBSTANCE: invention relates to methods for treating water by ultraviolet radiation, hydrogen peroxide, and silver- and titanium dioxide- containing heterogeneous catalyst, which can be used for disinfecting water in water-supply systems of separate buildings, towns and other inhabited localities. Process consists in that starting water is passed, at velocity 0.6-1.0 cu.m/h, through reactor provided with continuous-spectrum pulse xenon lamps emitting largely UV rays with wavelength 200-400 nm, frequency 1-1.3 Hz, specific power consumption 2-5 kJ/cu., and current density 2-5 kW/sq.m, after which 50-100 mg/l of hydrogen peroxide is added and water is passed through second reactor filled with heterogeneous catalyst prepared by mixing rutile powder no greater than 0.5 mm of particle size with silver metal consisting of particles no greater than 0.05 mm at their weight ratio (700- 1000):1, and subsequent addition of water to form paste, which is partially dried at 100-110 C and molded, for example, into tablets. Advantageously, catalyst is used in amount 0.5-1.5 mg/l. EFFECT: simplified process and prevented secondary bacterial infection of water for long time. 3 cl, 1 tbl, 2 ex