A large stream with a velocity of 0.85 m/s, saturated with oxygen, has a reoxygenation constant...

A large stream with a velocity of 0.85 m/s, saturated with oxygen, has a reoxygenation constant k2 = 0.4 day−1 and a temperature of T = 12oC, with an ultimate BOD = 13.6 mg/L and a flow rate Q = 2.2 m3 /s. Into this stream flows a wastewater stream with a flow rate of 0.5 m3/s, T = 26oC, L = 220 mg/L and oxygen level = 1.5 mg/L. Downstream the deoxygenation constant is k1 = 0.2 day−1 .

a) What is the dissolved oxygen 48.3 km downstream?

b) What will be the minimum dissolved oxygen? And at what distance from the outfall?

Expert Solution

Ally Wells answered 2 years ago

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