Patent ID: 7201856

Claim:
A composition for purifying and clarifying contaminated drinking water and which comprises: (i) a primary coagulant selected from the group consisting of water-soluble, multivalent inorganic salts and mixtures thereof; (ii) a microbiocidal chlorine-based disinfectant comprising a hydrophobic coating being operable to control the release of the disinfectant; (iii) an oxidant system providing catalytic or autocatalytic oxidation of soluble Mn(II) to MnO 2 ; and (iv) a bridging flocculant selected from the group consisting of water-soluble and water-dispersible anionic and nonionic polymers having a weight average molecular weight of at least about 2,000,000, and mixtures thereof; wherein the weight ratio of primary coagulant to bridging flocculant is from about 10:1 to about 200:1.