A city discharges 120 cumecs of waste water into a river, which is fully saturated with oxygen and flowing at the rate of 1600 cumecs during its lean days with a velocity of 0.2 m/sec.

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written 5.9 years ago by

akashgaikwad71 • 300

modified 4.6 years ago by

prashantsaini • 0

The 5 day BOD of waste water is 260 mg/lit and that of a river water is 2 mg/lit. Find when and where the critical D.O. deficit will occur in the downstream portion of river and what is its amount. Assume the coefficient of de-oxygenation(KD) as 0.1 and coefficient of re-oxygenation(KD) as 0.4.

industrial waste treatment

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