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Even if the total amount of water in the world remains the same, we observe a constant deterioration of water quality, water ecosystems and the surrounding environment of water courses and reservoirs. At the same time, the costs of treatment of surface and underground water for drinking water. For this reason, the pollution limits for wastewater treatment plants of all types are constantly being tightened, which increases the already high costs of their operation and often increases in the increased prices for was...