Suppose a stream with a velocity of 1 ft/s, a flow of 10 million gallons per day (mgd), and an ultimate BOD of 5 mg/L was hit with treated sewage at 5 mgd with an ultimate BOD (L,) of 60 mg/l. The temperature of the stream water is 20 °C, at the point of the sewage discharge the stream is 90% saturated with oxygen, and the wastewater is at 30°C and has no oxygen. Measurements show the deoxygenation constant k = 0.5 and the reoxygenation k, = 0.6, both as days1 Calculate: %3D
Suppose a stream with a velocity of 1 ft/s, a flow of 10 million gallons per day (mgd), and an ultimate BOD of 5 mg/L was hit with treated sewage at 5 mgd with an ultimate BOD (L,) of 60 mg/l. The temperature of the stream water is 20 °C, at the point of the sewage discharge the stream is 90% saturated with oxygen, and the wastewater is at 30°C and has no oxygen. Measurements show the deoxygenation constant k = 0.5 and the reoxygenation k, = 0.6, both as days1 Calculate: %3D
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:• Suppose a stream with a velocity of 1 ft/s, a flow of 10 million gallons per
day (mgd), and an ultimate BOD of 5 mg/L was hit with treated sewage at
5 mgd with an ultimate BOD (L,) of 60 mg/l. The temperature of the
stream water is 20 °C, at the point of the sewage discharge the stream is
90% saturated with oxygen, and the wastewater is at 30°C and has no
oxygen. Measurements show the deoxygenation constant k = 0.5 and the
reoxygenation k2 = 0.6, both as days1 Calculate:
• (a) the oxygen deficit 1 mile downstream,
• (b) the minimum dissolved oxygen (the lowest part of the sag curve), and
(c) the minimum dissolved oxygen (or maximum deficit) if the ultimate BOD
of the treatment plant's effluent was 10 mg/L. You may write a computer
program or use a spreadsheet program to solve this problem.
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