Sunday, April 8, 2007

Sewage Disposal Unit

Extracting the sewage for entering the river goes through three stages. First, the sewage from main sewer enters the settling tank. On the settling tank, the sewage is settled so it separated into two kinds of form, the liquid one, polluted water, and the solid one, undecayed solids, which is then removed and burned. Second, the polluted water is pumped by the pump house to enter the sprinkler beds. In the sprinkler beds, the rotating arms to be filtered by stones and microorganisms on the brickwork spray the polluted water out. Then, the water is purified and ready to enter the river.

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