The working principle of a manganese sand filter with aeration primarily involves introducing air into the water and utilizing manganese sand as a catalyst to oxidize divalent manganese ions (Mn²⁺) in the water into tetravalent manganese (MnO₂), thereby achieving manganese removal. The specific process is as follows:
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Aeration and Oxygenation: Air is introduced into the water through an aeration device, increasing the dissolved oxygen content in the water.
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Catalytic Oxidation by Manganese Sand: The catalytic action on the surface of the manganese sand facilitates the reaction between Mn²⁺ and dissolved oxygen in the water, producing MnO₂.
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Precipitation and Filtration: The generated MnO₂ particles are relatively large and easily settle, and are subsequently removed through the filtration action of the manganese sand layer.
This method is suitable for treating groundwater or other water sources containing manganese ions, effectively reducing manganese content and improving water quality.
