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Demanganization is a water treatment process that removes manganese from water. Manganese can cause water to have a dark color, a metallic taste, and a foul odor. Manganese can also promote the growth of bacteria that can clog pipes and damage equipment. Demanganization involves oxidizing the soluble divalent manganese (Mn 2+) with oxygen or other oxidizing agents to form insoluble manganese oxide (MnO 2). The manganese oxide can then be filtered out by sand filters or other methods. Demanganization is important for improving the aesthetic and sanitary quality of water, as well as protecting the water distribution system from corrosion and fouling. Demanganization can also enhance the efficiency of other water treatment processes, such as disinfection and softening.

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