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ECADEMY test

20 - Mixing in Wastewater Treatment

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Correct
Q: What is the aim of thrust-to-power sizing?
A: Deliver a sufficient thrust with the least possible energy consumption
Correct
Q: How did the Stargard project redesign the layout of mixers in the tank?
A: They spread four mixers across the tank
Correct
Q: Which of these describe the specific mixing power?
A: The ratio between the propeller power and the liquid volume
Correct
Q: Where do vortices develop if the propeller is too close to the water surface?
A: At the rear of the propeller
Correct
Q: Why is it important to position mixers correctly?
A: To maximise the total bulk flow
Correct
Q: Which of these isn’t a main target for wastewater mixers?
A: To ensure quick drainage from the tank