The process of disposing sewage consists of three main phases. Firstly, the sewage goes trough a main sewer and enters a settling tank. At this stage, the sewage is allowed to sediment leaving undecayed solids and polluted water. The undecayed solids are removed and burned while the polluted water is driven to the pump house. After pumped, the water flows to the sprinkler beds which consist of some parts. First of all, the polluted water gets into the rotating area. After the rotating step, jets of polluted water filtered by stones and microorganism. Finally, this process yields purified water that is save to enter the river.
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