METHOD OF DRINKING WATER PRODUCING Russian patent published in 2002 - IPC

FIELD: technology of water treatment. SUBSTANCE: invention relates to the combined methods of drinking water treatment using chemical reagents and ultraviolet radiation. Method of producing drinking water involves its filtration, preliminary treatment, sterilization by UV-radiation and the following conditioning by addition of silver ions. Preliminary treatment of water is carried out by chlorination and sterilization of water layer is carried out in device of tray type using low-pressure mercury lamps producing preferably UV-irradiation with the wavelength 260 ± 40 nm being these lamps are disposed over the layer of water to be treated with a height 20-50 cm in the dose of irradiation 15-30 mJ/cm². The conditioning is performed by the dosed feeding silver complex ammonia compounds of the formula Ag(NH₃)₂NO₃ or [Ag(NH₃)₂]SO₄ or a mixture of these compounds up to the final silver concentration 0.005-0.05 mg/l in water to be treated. Indicated solution of ammonia complex compound/silver compound is prepared by mixing 0.1- 1.0% solution of AgNO₃ and/or Ag₂SO₄ and gaseous ammonia or ammonia water up to the ratio Ag⁺ : NH₃ = 2.8-3.0. Method provides the production of drinking water being among from very infected sources and possibility of storage of the produced water for a long time without its deterioration of its quality. Invention can be used for drinking water disinfection in water supply systems of settlements, in ships and special mobile units used in extreme situations. EFFECT: simplified and accelerated method. 5 cl, 1 tbl, 3 ex