METHOD OF PURIFICATION OF THE UNDERGROUND WATER FROM THE IRON, MANGANESE AND THE HARDNESS SALTS Russian patent published in 2006 - IPC C02F1/64 C02F5/02 C02F103/06 

FIELD: purification of the underground water from iron, manganese and hardness salts.

SUBSTANCE: the invention is pertaining to the field of a purification of the underground waters from iron, manganese, hydrogen sulfide, carbon dioxide and the hardness salts of for the potable water purposes. The method provides for oxidation of the compounds of iron and manganese with simultaneous degasification of hydrogen sulfide and carbon dioxide on the non-flooded granular-fibrous polymeric loading with the bed depth of 1.0-1.5 m. The granules diameter is equal to 10-30 mm, the diameter of the fiber threads is equal to 1-2 mm at the specific consumption of the counter currently fed air of 4 -10 m³/h per 1 m³ of the initial water by a return flow of an incoming water and the specific hydraulic loading with respect to the treated water of 6-8 m/h³ per 1 m² of the layer surface, the additional oxidation of the iron and manganese compounds, deironing and demanganesing are conducted on the heterogeneous polymeric floating, granular loading with the granules diameter of 0.7-2.5 mm at the loading layer depth of 1.4-1.6 m and the speed of the filtration of 4.5-8 m/h at realization of the purification process in the self-flowing mode in one reactor-filter. The softening with application of the caustic soda in amount of 2.5-3.5 mg-equivalent/dm³ is conducted in the fluidized layer of the inert fine-grained contact mass with the diameter of the grains of 0.1-0.2 mm, the fluidized layer thickness of 1.5-1,7 m and the specific hydraulic loading with respect to the water - 50-60 m³/h per 1 m² with the subsequent deep postpurification by filtration through the granular filtering layer of 1.0-1.5 m thick. The grains diameter is equal to 1-2 mm and at the speed of the filtration of 8-12 m/h. The method ensures purification of the underground waters up to the quality of the drinking water at the simultaneous cost reduction of the method realization.

EFFECT: the invention ensures purification of the underground waters up to the quality of the drinking water at the simultaneous cost reduction of the method realization.

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