Water treatment compositions

C - Chemistry – Metallurgy – 02 – F

Patent

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Details

C02F 1/56 (2006.01) C02F 1/50 (2006.01) C02F 1/52 (2006.01) C02F 1/76 (2006.01)

Patent

CA 2451902

Compositions, methods and kits for purifying and clarifying and/or nutrifying contaminated drinking water and which comprise a primary coagulant material, a microbiocidal disinfectant and an oxidant system. Highly preferred compositions also contain one or more of a bridging flocculent material, the levels and ratios of coagulant to flocculent preferably falling within certain ranges, a cationic coagulant aid, especially chitosan, a water-soluble alkali, a water-insoluble silicate, and a food additive or nutrient source. The purified water remains free of discoloration for extended periods of storage.

L'invention concerne des compositions, des procédés, et des trousses de matériel permettant la purification, la clarification et/ou la nutrification d'une eau de consommation contaminée. Ces compositions comprennent un produit coagulant principal, un désinfectant microbicide, et un système oxydant. Les compositions préférées comprennent en outre un ou plusieurs des produits suivants : un produit floculant de pontage, les taux et les proportions relatifs du coagulant par rapport au floculant se situant de préférence dans des intervalles prédéfinis, un auxiliaire de coagulation cationique, en particulier le chitosane, un alcali soluble à l'eau, un silicate insoluble à l'eau, et un additif alimentaire ou une source nutritive. L'eau purifiée ne présente pas d'altération de couleur même lorsqu'elle est stockée pendant des périodes prolongées.

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