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A wastewater treatment plant serves 5,000,000 people. Each person on the average produces 0.1m^3 per person...

A wastewater treatment plant serves 5,000,000 people. Each person on the average produces 0.1m^3 per person per day of wastewater. If the ultimate BOD of the discharge from the plant is 50 mg/L into a 5-meter deep stream that has an average flow rate of 10m^3 per second, a velocity of 1 meter per second, and a BOD value of 5 mg/L. The deoxygenation constant Kd is 0.19/day, and DO at the mix point is 8.5 mg/L. The water temperature is at 20 degrees Celcius and DO5=9.1 mg/L.

What would be the time and distance needed to reach DOmin in the stream?

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Ally Wells answered 8 months ago
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