If the stirrer speed is too slow, bubbles will accumulate and coalescese under the impeller. This phenomenon is known as a
Options
A. coalesced impeller
B. flooded impeller
C. river impeller
D. dry impeller
Correct Answer
flooded impeller
Agitation and Aeration problems
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1. A fermentation system has a KLa of 3 s-1 and a C0* of 5 ppm of O2. If the bulk liquid is saturated with oxygen then the oxygen transfer rate will be equal to
Correct Answer: using specially designed axial flow impellers
4. A fermentation system has a KLa of 3 s-1 and a C0* of 5 ppm of O2. If the bulk liquid is completely depleted of oxygen, then the oxygen transfer rate will be equal to
10. In a two-phase system where the continuous phase remains in place, the gas hold up can be expressed as (where Vs and Vt are the superficial gas velocity and bubble rise velocity)