Waste Water Engineering Practice Test 5

1. ______ occur when the rate of oxygen transfer from the lagoon surface is less than the rate of oxygen consumption in the lower levels of the lagoon.

2. The measure of pH is the ______ ion concentration.

3. Natural oxygenation is _______ in aerated ponds while compared to facultative ponds.

4. Which ions are present on the charged surface of MBBR?

5. Aerated ponds must be shallow.

6. Calculate the volume of the aeration tank required for the following data:
Flow: 800 m³/d
BOD: 1000 mg/L
F/M ratio: 0.15(extended aeration)
MLSS : 3500 mg/L

7. Which is the next reactor after activated sludge reactor in the treatment process?

8. For the removal of phosphorous through Activated Sludge Process (ASP) what would be the Solid retention time considered?

9. What is the length of the cylinder?

10. How many types of aerators are present?