TWO-LAYER COMPACTED SOLID PRODUCT FOR WATER POTABILIZATION AND PREPARATION METHOD

摘要

The present invention relates to a compacted solid product for water purification comprising: - at least a first layer comprising at least a coagulant/flocculant system comprising at least one polyvalent inorganic salt, at least one water-soluble cationic polymer and at least one high-molecular-weight anionic polymer, - at least a second layer comprising at least one disinfectant that releases active chlorine on contact with water, characterized in that said coagulant/flocculant system moreover comprises a sodium alginate. The invention also relates to the method for preparing such a product.