METHOD OF WASTE WATER PURIFICATION FROM IONS OF HEAVY METALS IN PRODUCTION OF BALLISTIC POWDER Russian patent published in 2008 - IPC C02F1/62 C02F103/34 C02F101/20 

FIELD: chemistry, technological processes.

SUBSTANCE: waste water of ballistic powder production, polluted with ions of heavy metals, is treated with sodium carbonate at pH=9-10, polyacrylamide is added, and heated with vapour during 25-35 minutes. Formed insoluble carbonates of heavy metals are filtered and clarified water is passed through absorber, filled in sections with wooden chips, activated coal, ion-exchanging resins. Then purified water is discharged on treatment facilities. In preferable version of method realisation 1% solution of polyacrylamide in amount 0.015-0.030 % is added to treated water. As ion-exchanging resins cationite "КУ-2-8" and anionite "АН-31" are used, as activated coal, coal of brands "БАУ" and "АГ-3" is used. For purposes of environment protection sediment is burned and introduced into cement-gravel mixtures for repairing of roads, floors and different non-load-carrying constructions.

EFFECT: virtually complete purification of waste production water and waste-free, ecologically clean technology.

4 cl, 2 dwg, 3 tbl