DRINKING WATER PRODUCTION PROCESS Russian patent published in 2003 - IPC

FIELD: water treatment. SUBSTANCE: invention relates to treatment of water, industrial and household waste waters, in particular to multistage treatment of water. Process can be used for production of drinking water by treating natural surface and underground waters. To this end, following operations are consecutively performed: disinfecting by UF irradiation in dose 30 mJ/sq.cm, treatment with coagulant (aluminum sulfate) and then with flocculant (polyacrylamide) in amount 0.05- 0.2 mg/cu.dm followed by clarification in a bed of foamed plastic bricks or foamed polystyrene, and filtration through quartz sand with grain fineness 0.3-1.5 mm and gravel with particle size 0.5-5 mm. EFFECT: simplified production technology and reduced expenses on equipment. 1 dwg, 2 tbl