12.61 A step-aeration activated-sludge sys an air supply of 1200 ft/lb of BOD level. The measured average oxygen the oxygen transfer efficiency. (Assu the amount at 20°C and 760 mm pre 2.62 An air supply of 1
12.61 A step-aeration activated-sludge sys an air supply of 1200 ft/lb of BOD level. The measured average oxygen the oxygen transfer efficiency. (Assu the amount at 20°C and 760 mm pre 2.62 An air supply of 1
Solid Waste Engineering
3rd Edition
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Worrell, William A.
Chapter7: Thermal Processes
Section: Chapter Questions
Problem 7.1P
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![vated sludge.
12.61 A step-aeration activated-sludge system at a loading of 40 lb of
BOD/1000 ft³/day requires
an air supply of 1200 ft/lb of BOD applied to maintain an adequate dissolved-oxygen
level. The measured average oxygen utilization of the mixed liquor is 36 mg/1/hr. Calculate
the oxygen transfer efficiency. (Assume 0.0174 lb of oxygen per cubic foot of air, which is
the amount at 20°C and 760 mm pressure.)
12.62 An air sunnly](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F453e1bb5-e20d-4e29-8b4a-6f9ad059cc4b%2Fd23fffec-835c-42df-8cfc-d676f867c98d%2F1ks4q8e_processed.jpeg&w=3840&q=75)
Transcribed Image Text:vated sludge.
12.61 A step-aeration activated-sludge system at a loading of 40 lb of
BOD/1000 ft³/day requires
an air supply of 1200 ft/lb of BOD applied to maintain an adequate dissolved-oxygen
level. The measured average oxygen utilization of the mixed liquor is 36 mg/1/hr. Calculate
the oxygen transfer efficiency. (Assume 0.0174 lb of oxygen per cubic foot of air, which is
the amount at 20°C and 760 mm pressure.)
12.62 An air sunnly
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