COMBINED METHOD OF THE WATER DECONTAMINATION Russian patent published in 2006 - IPC C02F9/12 C02F1/72 C02F103/04 

FIELD: municipal services; multistage methods of the waters decontamination.

SUBSTANCE: the invention is pertaining to the multistage methods of water treatment with application of the ultra-violet (UV) irradiation and the reactants and may be used for purification and decontamination of the portable water in the water supply systems of the settlements. The method of decontamination of the portable water includes its treatment with hydrogen peroxide, the UV irradiation in the range of the wave lengths of 200-400 nanometers and injection of argentum ions. At that the argentum ions are introduced with the concentration of 0.0005-0.003 mg/l in two stages - at the first stage the half of the total amounts introduced, keep the water within 1 hour at the constant air stirring. Then the hydrogen peroxide is introduced, keep the mixture for 1 hour and gate the water through the UV-irradiation installation at the frequency of the irradiation of 0.8-1 Hz and the specific power inputs of 0.8-1 kJ/m³ with the simultaneous feeding of the second half of the argentums ions. In the capacity of the source of argentums ions may be used the water solution of salts of argentum or the water solutions of ammoniac complexes of the argentum prepared by addition at the stirring action to the 0.2 % solution _of Ag₂SO₄ or AgNO₃ of gaseous ammonia at the mass ratio Ag⁺:NH³, equal to 1:2.8-3.0. can be. After injection of the first half of the argentums ions the aging is conducted at the ratio of volumes of water and the gated through air as 1:1-3. The method ensures expansion of the range of means of the portable water decontamination and creation of the ecologically reliable method having the capability of prevention of the secondary bacterial contamination for the long time at reduction of the quantity of the used argentum and decrease of the power consumption.

EFFECT: the invention ensures expansion of the means of the portable water decontamination, creation of the ecologically reliable method allowing to prevent the secondary bacterial contamination of the water for the long time at reduction of the used argentum quantity and power consumption.

3 cl, 1 tbl, 4 ex