Sewage disposal unit works in three processes. First, sewage is transferred in settling tank. In this tank, undecayed solids settle in the base of tank. Then, this solid are removed and burned. The polluted water is transferred to pump house. In the pump house, water is pumped in high speed to the next process in sprinkle beds. Polluted water pass three steps in sprinkle beds. Firstly, it is rotated in rotating area. Then, jets of polluted water is come out from rotating area and filtered. This purified water is safe to enter the river.
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