METHOD OF WATER TREATMENT AGAINST IRON BACTERIA Russian patent published in 1995 - IPC

FIELD: water treatment. SUBSTANCE: method involves degassing at simultaneous water saturation with air oxygen, filtration through the grainy loading followed by filtrate disinfection. 0.4-0.5% grainy loading volume is displaced with grainy loading grains depleted in the process of natural water filtration surface of which is activated by film of iron compounds and iron bacteria colonies. Loading grains of size 0.5-0.6 mm were used, and grainy loading is used after 50-720 hr working at the process of filtering. Method is used for water preparation for water supply. EFFECT: improved method of water treatment. 3 cl, 1 tbl