The present invention is mainly related to a centrally supplied water treatment system installed in large-scale centrally supplied water supply facilities, such as an apartment complex, to treat drinking water. 1) The raw water is pressurized and supplied by the raw water feed pump (2) to remove the floating substances and turbidity, etc., the primary micro filter (1μ) (3) and the treated water via the primary micro filter (3) Installed between the cartridge type activated carbon filtration device (4) and the primary microfilter (3) and activated carbon filtration device (4) in which organic matter, taste, smell, fines, residual chlorine and the like are filtered out. To maintain a constant flow rate and pressure of the treated water, thereby minimizing pressure loss, and to promote even filterability and long life, and floating materials and turbidity not removed from the primary microfilter 3. Ingredients Secondary micro filter (0.5 μ) (5) to remove, Ultra filter (0.2 μ) (6) to remove microorganisms in the treated water and harmful substances in health and supply to the treated water storage tank (7), and storage tank Ultraviolet sterilizer (8,8 ') installed in (7) to sterilize pollutants such as air layer that may cause additional pollution to clean water, and treatment to supply treated water sterilized in storage tank 7 for each household The main point is that the secondary pressure tank (11) is installed in the water supply pressure pump system (9) to maintain a constant flow rate and pressure of the supplied water to increase the simultaneous use rate.
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