Multi-media filter for sewage treatment equipment

2021-09-14

The multi-media filter mainly removes the mud, suspended matter, colloidal impurities, algae and other organisms in the water, and reduces the mechanical damage and pollution to the reverse osmosis membrane elements.

Multi-media filter overview
Multi-media filter is a process of using one or several filter media to pass water with higher turbidity through a certain thickness of granular or non-granular materials under a certain pressure to remove suspended impurities and clarify the water. The turbidity of the effluent can reach 3 Below degree.
The commonly used materials for the tank body of the multi-media filter are carbon steel anti-corrosion or rubber lining, stainless steel 304, and glass fiber reinforced plastic. There are two modes of operation: PLC full automatic control and manual operation, which is easy to operate and maintain.
Multi-media filter-filter layer
The multi-media filter uses quartz sand, activated carbon, anthracite, manganese sand and other materials as the filter layer. The top layer of the filter layer is composed of the lightest and coarsest grade materials, while the heaviest and finest grade materials are placed at the bottom of the filter layer. Small particles are removed deeper in the filter media.

Multi-media filter filtration method
The multi-media filter is a pressure filter. The water flow enters the filter material layer from the water inlet due to pressure. The sand particles in the filter material layer are arranged very tightly, so that the particles in the water have more chances to collide with the sand particles. Due to adsorption and mechanical The blocking effect is retained by the surface of the filter layer to obtain clarified water. The suspended solids in the effluent after filtration can be less than 5mg/L.
Multi-media filter performance characteristics
Multi-media filter is economical and practical, has low requirements on raw water quality, simple treatment process, convenient operation, small maintenance, low energy consumption, etc., stable effect in operation and treatment, good decolorization effect, thorough decomposition of organic matter, and is widely used In various fields.
Application field of multi-media filter
Multi-media filters are widely used in the pretreatment of permeation, electrodialysis, ion exchanger, ultrafiltration and other systems, the pre-filtration treatment of raw water in papermaking, power generation, chemical and other systems, domestic water pretreatment, industrial water treatment, and swimming pool water treatment. It is also used in circulating water side filter system, surface water, groundwater turbidity and color removal, wastewater treatment and other industries.