METHOD AND APPARATUS FOR ACTIVE DEMANGANATION OF LIQUID Russian patent published in 2004 - IPC

FIELD: purification of underground water from iron and manganese.

SUBSTANCE: method involves vacuumizing and mixing liquid flow by dispersing with oxidizer; feeding resultant gas-liquid mixture into casing with unflooded filtering charge; providing separate discharge of purified liquid and gas, with liquid flow being divided before vacuumizing process and directed through respective vacuum dispersing heads having vacuum zones communicated with one another. Oxidizer is supplied into communicated vacuum zone by self-suction followed by intensive mixing or reacting with liquid under purification process. Supplying of ozone-air mixture as oxidizer provides for oxidation of organic and inorganic difficult-to-oxidize substances in short-cycle mass exchange process. Apparatus has casing with filtering charge, liquid supplying branch pipe equipped with venturi nozzle, and mixer arranged concentrically at outer side of nozzle and made in the form of cylinders attached to nozzle and provided with gauged openings. Cylinders have gradually increasing diameter and length. Apparatus is further equipped with purified water and gas discharge branch pipes. Liquid feeding branch pipe has liquid flow distributor with outlet portions, each connected to venturi nozzle. Mixers are arranged in closed zones communicated with one another via vacuum line, which is connected to auxiliary oxidizer supplying branch pipe. Method and apparatus provide for effective joint removal from liquid of inorganic difficult-to-oxidize substances, such as manganese, and organic substances, such as phenol, humic compounds, fulvic acids. Method and apparatus may be used in systems for supplying water to populated areas, individual objects and agricultural complexes.

EFFECT: increased efficiency in water purification and wider range of use.

3 cl, 1 dwg, 2 tbl