Use of electric-pulse water treatment method for domestic water supply

Abstract

To purify and disinfect underground water in the closed administrative-territorial entity ZATO “Sibirskiy” of the Altai Region and bring its quality to the level of drinking water corresponding to the requirements of the sanitary regulations and standards SanPiN 1.2.3685-21, it is planned to install a block-box with a water purification complex “Impulse-250-5/50” with a capacity of 50 m³ per hour. The need to improve water quality arose due to the fact that when analyzing the quality indices of the source water, according to the data of the analysis protocols, it was found that the concentration of total iron in all wells varied from 0.69 to 2.34 mg dm³, compared to the reference value of 0.3 mg dm³, and almost all wells had increased concentration of manganese. According to the existing water supply scheme, water from artesian wells is fed by submersible pumps to the water purification complex, aerated, and treated with natural oxidizers (including ozone) and ultraviolet. Under the influence of oxidizers, organic substances are destroyed, inorganic impurities (iron, manganese) are converted into forms that are easily removed by subsequent filtration, and water is disinfected. Then, purified water is fed to clean-water reservoirs. Clean water is supplied to the consumer by network pumps of the second-lift pumping station. The proposed technology allows for aeration of the treated water and oxidation of impurities (Fe and Mn) in it without the use of oxidizing reagents. Filters are washed with water and air. Filters are washed by counter-current of clean water taken from the outlet manifold and air supplied by the compressor. Water supply to the clean-water reservoirs is stopped during washing. Repeated use of filter wash water in this case seems impractical. Filter wash water accumulates in the sump. A bypass communication is provided in the treatment station building ensuring the supply of source water directly from the wells to the clean-water reservoirs. Additional advantage of the water treatment complex is its round-the-clock unmanned automatic operation.