A Waste water treatment units is proposed to be designed for the Wilayat of Sur. Population...

A Waste water treatment units is proposed to be designed for the Wilayat of Sur. Population of Sur is 200,000 and an average sewage generation is 210 liter per capita per day. Design an appropriate waste water treatment plant using the following given data. If needed assume other necessary data.

Approach channel velocity = 42 m/min, d = 1.5 w Design three aerated grit chamber Detention time in grit chamber = 3 min Depth of aerated grit chamber = 2.0 m Depth to width ratio in aerated grit chamber is 1:1.2 Total depth of primary clarifier = 3 m (Mechanical Sludge removal) Overflow rate = 20 m3/m2.d Detention time in the primary clarifier should be greater than 1.5 hours Secondary clarifier with a depth of water equal to 0.5 times the Length (Mechanical Sludge removal) Detention time in secondary clarifier = 2 hours

Design (size of the unit) the following units of the treatment process:

Rectangular Bar screen channel, Rectangular Aerated Grit chamber, Six Circular Primary Clarifier, and Six Square Secondary Sedimentation tank.

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Ally Wells answered 10 months ago

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