Question

When does the rate of aerobic oxidation reduced in the sewage that is reduced to the water?

• A. When oxygen concentration falls below 1.5 mg/l
• B. When oxygen concentration falls below 2.5 mg/l
• C. When oxygen concentration falls below 3.5 mg/l
• D. When oxygen concentration falls below 4.5 mg/l

Answer 1

Answer:

A. When oxygen concentration falls below 1.5 mg/l

When the oxygen concentration falls below 1.5 mg/l, the rate of aerobic oxidation is reduced and replaced by anaerobic bacteria that can oxidizes the organic molecules without the use of oxygen.