Filter bed for water treatment, especially for removing iron and manganese from drinking water, comprises three layers

摘要

Filter bed for water treatment comprises a bottom layer, a middle layer capable of removing manganese and a top layer of a third material for mechanical filtration. Filter bed for water treatment comprises a bottom layer of a first material (8), a middle layer of a second material (10) capable of removing manganese, and a top layer of a third material (12) for mechanical filtration, where the particle size of the third material is greater than that of the second material.