METHOD OF PURIFYING DRINKING WATER AND STATION FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC C02F9/00 C02F9/08 

FIELD: chemistry.

SUBSTANCE: method of purifying liquid includes water preparation before purification by introducing reagents, water purification by gravity deposition using ballast materials and filtration method, hydrocyclone separation of ballast and impurities removed from the liquid, disinfection of water before shipment to the consumer. Preparation of purified water is carried out in two stages: in the first stage, firstly ammonium sulfate and then sodium hypochlorite are introduced into the water in an ejection way, and in the second stage, a coagulant, flocculant and ballast are introduced into the water in the mixing mode; the prepared water is pre-purified by contact-vortex precipitation, and finally - by filtration through the pre-coat layer; impurities removed with part of the water in the preliminary and final stages of purification are mixed with soda solution, coagulant and flocculant and sent to thickening by contact-vortex precipitation, the resulting precipitate is dehydrated, and the purified water is sent for preliminary purification; the ballast removed at the pre-treatment stage is cleared from impurities and reused in the second stage of water treatment; the filter material removed at the final filtration stage is cleared from impurities in the force field and re-used for the process of pre-coating the filter elements.

EFFECT: decreasing specific capital investments, labour intensity and energy consumption of purifying a unit of water volume as a result of re-use of reagents and filter materials.

6 cl, 1 dwg