METHOD FOR SOFTENING OF NATURAL WATERS Russian patent published in 2009 - IPC C02F5/00 C02F1/46 

FIELD: mining.

SUBSTANCE: method may be used in the field of municipal engineering in centralised systems and decentralised systems of water supply, and may also be used in water preparation for purposes of industrial enterprises. Method includes water filtration in mineral grain materials available in electric field created by electrochemical source of current, which consists of short-circuited electrodes. Electrochemical source of current is made of perforated disk from aluminium, having negative potential, and perforated disk from graphite, having positive potential, connected by conductor, between which a mineral grain material is located, at the same time water is passed in direction opposite to direction of electric field power lines, created by electrochemical source of current. Number of electrochemical sources of current is selected from 1 to 16. Filtering material used is silicicated calcite. Speed of water filtration makes 0.6-2.6 m/hr.

EFFECT: simplified process of water softening by filtration, increased share of standard mineral filtering materials, reduction of costs for method realisation.

4 cl, 2 dwg, 1 ex