METHOD FOR PURIFYING GROUNDWATER FROM RADON, ALPHA ACTIVITY, IRON, MANGANESE, HARDNESS SALTS AND CARBON DIOXIDE Russian patent published in 2023 - IPC C02F9/00 C02F1/42 

FIELD: autonomous water supply.

SUBSTANCE: invention relates to the autonomous water supply of objects with low water consumption with an hourly flow rate of up to 2.5 m³/hour. In the method of groundwater purification from radon, alpha activity, iron, manganese, hardness salts and carbon dioxide, groundwater is supplied at a flow rate of 0.5-1.5 m³/h to the main cartridge-type filter with filtering porous material. The filtered underground water is supplied with the same flow rate to the Na-cationization filter, which uses a multi-layered loading - Ecotar B as a filtering material with a loading layer height of 500-700 mm and a filtration rate of 10-20 m/h. The water passed through the Na-cationization filter is fed into the aerator with subsequent degassing at a specific flow rate of counterflow air of 2.4-19.2 m³/m³ and aeration time of 20-40 minutes. Then water is supplied at a flow rate of 0.5-2.5 m³/h to the main cartridge-type filter with a filtering porous material of 5 mcm.

EFFECT: provides a reduction in the amount of pollution, a decrease in aggressiveness, an increase in the stability of water quality in the filtration mode with a variable flow rate.

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