Q. The Intermig impeller is

View solution

Q. Main reason for using baffles in stirred tank reactors are

View solution

Q. During aeration, a cylindrical reactor had a height of 10 m. Without aeration, the height was 7.5 m. Under these aeration and mixing conditions, the gas hold up in the reactor is

View solution

Q. A fermentation system has a KLa of 3 s­¹ 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

View solution

Q. Which of the following would be best described as a radial flow impeller?

View solution

Q. Small propellers turn at the speed of either

View solution

Q. In aerobic microorganisms cultures radial flow impellers are used because

View solution

Q. Which of the following is not classified as an axial flow impeller?

View solution

Q. Power number (Np) is also known as

View solution

Q. Flooding is a condition/phenomenon which occur in a bioreactor when

View solution

Q. A cylindrical reactor has a liquid volume of 100,000 litres. It has an aspect ratio the ratio of the channel height to width of 1:1. The height of the liquid in the reactor will be approximately:

View solution

Q. Detergent like substances produced by microorganisms during a fermentation will lead to

View solution

Q. In the design of a paddle agitator, the ratio of paddle diameter to tank diameter is normally taken as

View solution

Q. The oxygen absorption rate can be determined by

View solution

Q. Industrial paddle agitators turn at the speed of

View solution

Q. The dynamic technique is based on the

View solution

Q. The addition of antifoams to an aerated bioreactor will decrease oxygen transfer rates because antifoams

View solution

Q. Which of the following will have the largest interfacial area per unit volume?

View solution

Q. Which device is commonly used for measuring the rate of rotation (rpm) of the stirrer shaft?

View solution

Q. Laminar flow range of mixing speed is obtained for

View solution