How do multi-media filters filter water quality?

How do multi-media filters filter water quality?

In a set of water treatment equipment, in addition to the main filtration equipment, there are a lot of pretreatment equipment, such as multi-medium filter, it can filter out the material that will cause damage and blockage of the equipment behind the water, and play a role in protecting the equipment behind. In everyone's opinion, the multi-medium filter is a big pot, I do not know how to deal with it. How do so many media filters filter the water quality?

Multi-medium filter is the use of different filter layers to treat the water, through the corresponding pressure to the higher concentration of water through the filter layer, to remove suspended impurities to make the water clear, long use of filter material quartz sand, anthracite, manganese sand and so on. It is mainly used in the removal of turbidity in water treatment. In the pre-treatment of some water treatment equipment, the effluent after treatment can reach 3 degrees below.

The top layer of the filter layer of the multi-media filter is composed of thicker and lighter materials, the finer materials are placed at the bottom of the filter layer, the principle is to filter according to the depth, the larger particles are removed in the top layer, the smaller particles are removed in the depth of the filter, so that the water meets the standard after coarse filtration.

The working principle is that when the raw water passes through the filter material from the top down, the suspended matter in the water is intercepted by the surface of the filter layer due to adsorption and mechanical choke.

When the water flows into the middle of the filter layer, the arrangement of the sand in the middle of the filter layer is more closely, so that the particles in the water have more chances to collide with the sand, the surface of the flocculant, suspended matter and sand stick to each other, the impurities in the water are intercepted in the filter layer, so as to get the clarified water quality. The effluent suspended matter after filtration can be less than 5 mg/L.

Multi-media Filter 4

Multi-medium filter is through the above steps to filter the water quality, the filtration of water quality is mainly dependent on the different filter layer in the multi-medium filter, different filter layer will play a different role, you can choose the use of filter material according to the impurities in the water to achieve the desired water quality.