METHOD OF PURIFYING HIGHLY MINERALIZED ACID WASTEWATER FROM A SULPHATE TREATMENT PLANT Russian patent published in 2019 - IPC C02F1/58 C02F1/66 C02F1/42 C02F101/10 C02F103/04 

FIELD: technological processes.

SUBSTANCE: invention can be used in the field of water treatment in thermal power engineering and industry for purification of high-mineralized acid wastewater from sulphates. Method involves treatment with an alkaline calcium-containing reagent, wherein simultaneously dosing a neutral water-soluble calcium salt. Alkaline calcium-containing reagent used is a carbonate slurry for pretreatment of a water treatment plant. Neutral water-soluble calcium salt is saline spent regeneration solutions of Na-cationite filters of a water treatment plant. Carbonate slurry is transported together with purified highly mineralized wastewater.

EFFECT: method provides complex purification of high-mineralized acidic and rigid wastewater from a sulphate treatment plant in a single step with safe and available calcium-containing reagents, which are wastes from the chemical water treatment.

1 cl, 1 dwg, 1 tbl