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Our industrial sand filters involves the flow of water through a bed of granular media with settling basins in conventional water treatment trains. This enables to remove the particulate matter left over after flocculation and settling. This works on the principles of mechanical straining and physical adsorption. Hence this is a physical-chemical process for separating suspended and colloidal impurities from water. The impurities are absorbed on the surface of grains and the water fills the pores of the filter medium. Whereas for activated carbon filter, activated carbon is filled in the tank. After which the fluid is passed through the filter and with the adsorption process, the color of fluid is removed.