LOW TURBID COLOR WATER PURIFICATION METHOD Russian patent published in 1995 - IPC

FIELD: industrial and drinking water supply. SUBSTANCE: having 14,3 mg/dm³ of suspended substances natural water of 38 deg. chromaticity is specially polluted by salts of heavy metals and so increasing of commemoration of iron up to 0,9 mg/dm³, of copper 0,4 mg/dm³, of lead 0,2 mg/dm³. Then it is treated with coagulant sulfate of aluminum and with dust-shaped sorbent aluminosilicate. Flocculation is exercised in terms of continuous stirring of water with ejecting in it earlier formed flocs. After process of flocculation is finished water is clarified using mode of hindered precipitation. Due to introduction of dust-shaped sorbent in zone of stirring and ejecting flocs are in process of stirring are dispersing, time period, required for flocs precipitation, is decreased by 25 and simultaneously quality of purification is improved ( as compared with known method): by value of residual aluminum half the value, by value of residual iron 0.666 of previous value. EFFECT: improved quality of purification and decreased time of flocs precipitation. 2 cl, 1 tbl