A wastewater treatment plant discharges 10 MGD effluent containing 200 mg/L ultimate BOD into a stream flowing at 90 MGD with ultimate BOD of 5 mg/L. The deoxygenation constant, kd, is 0.12/day. (a) What is the ultimate BOD (BOD) remaining in the stream at a distance of 10,000 m downstream if the stream flows at a constant speed of 0.10 m/s?

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. A wastewater treatment plant discharges 10 MGD effluent containing 200
mg/L ultimate BOD into a stream flowing at 90 MGD with ultimate BOD of 5
mg/L. The deoxygenation constant, kd, is 0.12/day.
(a) What is the ultimate BOD (BOD) remaining in the stream at a
distance of 10,000 m downstream if the stream flows at a
constant speed of 0.10 m/s?
(b) What should be the treatment plant effluent BOD. (CW) in mg/L if
the ultimate BOD, at 10,000 m downstream cannot exceed 5
mg/L?
Transcribed Image Text:. A wastewater treatment plant discharges 10 MGD effluent containing 200 mg/L ultimate BOD into a stream flowing at 90 MGD with ultimate BOD of 5 mg/L. The deoxygenation constant, kd, is 0.12/day. (a) What is the ultimate BOD (BOD) remaining in the stream at a distance of 10,000 m downstream if the stream flows at a constant speed of 0.10 m/s? (b) What should be the treatment plant effluent BOD. (CW) in mg/L if the ultimate BOD, at 10,000 m downstream cannot exceed 5 mg/L?
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