METHOD OF NEUTRALIZING AND PURIFYING WASTE WATER Russian patent published in 2025 - IPC C02F1/66 C02F1/62 C02F1/64 

FIELD: water treatment.

SUBSTANCE: invention relates to waste water treatment, particularly to a method of neutralizing and purifying industrial waste water from nonferrous metal ions and high-concentration iron. Method of neutralizing and purifying waste water involves adding electric steel-smelting slag with a fraction smaller than 0.1 mm in ratio S:L = 1:5 while stirring for not less than 60 minutes until achieving pH 4.45-5.33. Further, the precipitate is separated and lime milk is added to the filtrate while stirring until achieving pH 9.7-10.2. After settling, purified water and sludge are obtained, which together with the residue is fed into a sludge collector.

EFFECT: neutralization of waste water and high efficiency of its purification from metals are ensured.

1 cl, 2 dwg, 6 tbl, 4 ex