Multi-media filter is a process in which one or several filter media are used to pass water with high turbidity through a certain thickness of granular or non-granular materials under a certain pressure, thereby effectively removing suspended impurities and clarifying the water. Used in water treatment to remove turbidity, softened water, pre-treatment of pure water, etc., the turbidity of the effluent can reach below 3 degrees.
The meaning of filtration, in the process of water treatment, filtration generally refers to the process of retaining suspended impurities in the water with filter material layers such as quartz sand and anthracite, so that the water can be clarified. The porous material used for filtration is called filter material, and the filter material is granular, powdery and fibrous. Commonly used filter materials are quartz sand, anthracite, activated carbon, manganese sand, magnetite, ceramics, plastic balls, etc.
Multi-media filter (filter bed) is a medium filter that uses two or more media as the filter layer. In the industrial circulating water treatment system, it is used to remove impurities in sewage, adsorb oil, etc., so that the water quality meets the requirements of recycling. . The function of filtration is mainly to remove suspended or colloidal impurities in water, especially to effectively remove tiny particles and bacteria that cannot be removed by precipitation technology. BODs and COD also have a certain degree of removal effect.
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