METHOD OF BIOLOGICAL TREATMENT OF WATER FROM SALTS Russian patent published in 1997 - IPC

FIELD: biotechnology, water treatment. SUBSTANCE: method involves contact of water to be treated with bulrush, cat's-tail and iris grown in preliminary washed substrate (granule size is 1-3 mm, density is 20-25 U/m²). Process is carried out under layer of polymeric granulated charge (its density is less than water one) at air feeding rate under substrate layer 0.15-0.2 l x s/m² for 1.5-2.0 h per day. Treated water is removed through the tubular porous drains filled with activated carbon and placed over substrate. Method provides desalting degree increase from 22-23% to 57%. EFFECT: improved method of water treatment, enhanced effectiveness. 2 dwg , 1 tbl