METHOD OF WATER PURIFICATION AND A COMPLEX FLOCULATING AGENT FOR THE METHOD REALIZATION Russian patent published in 2005 - IPC

FIELD: reagent methods of water purification for economic and drinking needs.

SUBSTANCE: the invention is pertaining to reagent methods of water purification for economic and drinking needs, including waters of the surface and underground springs, and also municipal water pipelines water. The method of water purification provides for simultaneous introduction into the being purified water of an inorganic coagulant and a cationic flocculating agent with consequent separation of the formed flocculas by filtration. At that the cationic flocculating agent represents a water solution containing (g/l): 1 - 20 - chitosan, 1-20 - hydrochloric acid or glutamic acid or acetic acid and 0.001-0.5 - silver chloride at a mass ratio of the coagulant and chitosan from 3:1 up to 30:1. A mass ratio of the coagulant and chitosan keep equal from 5:1 up to 10:1. Filtration is realized with the help of the oxygenating catalytic fillings in a standard mode or in a stream. The complex flocculating agent for water purification will consist of a water solution of an inorganic coagulant and a cationic flocculating agent. At that it in addition contains silver chloride and an acid chosen from the group of hydrochloric acid, glutamic acid, acetic acid, and in the capacity of the cationic flocculating agent and a coagulant accordingly - chitosan and the soluble aluminum salts and-or iron, at the following ratio of the components (in g/l): a coagulant - 10-45 (in terms of metal); chitosan - 1-20; an acid - 1-20; silver chloride - 0.001-0,5; water - the rest. The method and the flocculating agent ensure an intensification of the purification process at the expense of increased speed of flocculation and a filtration.

EFFECT: the invention ensures an intensification of the purification process at the expense of increased speed of flocculation and a filtration.

5 cl, 1 dwg, 2 tbl, 2 ex