1
Which of these describe the specific mixing power?
3
What are deadzones?
4
How did the Stargard project redesign the layout of mixers in the tank?
5
Why is it important to position mixers correctly?
6
Where do vortices develop if the propeller is too close to the water surface?
Test results
Congratulations. You have passed the test and completed the 20 - Mixing in Wastewater Treatment
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Q: Which of these describe the specific mixing power?
A: The ratio between the propeller power and the liquid volume
Q: Which of these describe the specific mixing power?
A: The ratio between the liquid volume and the solid particles
Q: Which of these describe the specific mixing power?
A: The ratio between the propeller power and propeller size
Q: How much was the average velocity of the volume improved by?
A: 20%
Q: How much was the average velocity of the volume improved by?
A: 25%
Q: How much was the average velocity of the volume improved by?
A: 30%
Q: What are deadzones?
A: Areas that are compromised during the mixing process
Q: What are deadzones?
A: Areas consisting of infected water
Q: What are deadzones?
A: Areas in which the homogeneity is high
Q: How did the Stargard project redesign the layout of mixers in the tank?
A: They gathered four mixers in the middle of the tank
Q: How did the Stargard project redesign the layout of mixers in the tank?
A: They spread four mixers across the tank
Q: How did the Stargard project redesign the layout of mixers in the tank?
A: They remained in the same position, but were replaced with more powerful mixers
Q: Why is it important to position mixers correctly?
A: To prevent the propellers from breaking
Q: Why is it important to position mixers correctly?
A: To neutralise vortices
Q: Why is it important to position mixers correctly?
A: To maximise the total bulk flow
Q: Where do vortices develop if the propeller is too close to the water surface?
A: At the front of the propeller
Q: Where do vortices develop if the propeller is too close to the water surface?
A: At the rear of the propeller
Q: Where do vortices develop if the propeller is too close to the water surface?
A: Underneath the propeller