FIELD: water treatment.
SUBSTANCE: invention relates to environmental protection, to water treatment and water disposal. Composite reagent for purifying aqueous solutions includes a coagulant, a flocculant and a pH regulator. Coagulant used is a combined iron-silicon coagulant-flocculant, the flocculant is an anionic flocculant, and the pH regulator is a mixture of calcium hydroxide and sodium bicarbonate. Composite reagent contains: 52-57 wt.% of iron-silicon coagulant-flocculant, 0.3-0.5 wt.% anionic flocculant, 21.35-23.75 wt.% calcium hydroxide and 21.35-23.75 wt.% sodium bicarbonate.
EFFECT: providing a composite reagent having high stability of properties, simplicity and cost-effectiveness of storage, dosing and transportation, and also allowing to increase the purification efficiency – to reduce the purified water mineralization and to achieve the purified water standardized indicators.
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