Discussion
Home ‣ Biochemical Engineering ‣ Immobilized Enzyme See What Others Are Saying!
- Question
If Damkohler number, NDa >>1, the reaction rate is much greater than the mass transfer rate and the overall reaction is controlled by the rate of mass transfer. In this case, the enzyme reaction can be described as (where Csb and Cs are the substrate concentration in bulk of solution and at the immobilized enzyme surface respectively. ks mass transfer coefficient, and a is the surface area of an immobilized enzyme particles)
Options- A. rp = ksa(Csb-Cs)
- B. rp = ksaCsb
- C. rp = ksaCs
- D. rp = ksa(Csb+Cs)
- Correct Answer
- rp = ksaCsb
- 1. In a bioreactor, if at a particular time the oxygen transfer rate is 23 kg.h-1, then the oxygen uptake will be
Options- A. 23 kg.h-1
- B. less than 23 kg.h-1
- C. greater than 23 kg.h-1
- D. 2.3 kg.h-1 Discuss
- 2. Temporary hardness of water is caused by the presence of
Options- A. chlorides of calcium and magnesium
- B. sulfates of calcium and magnesium
- C. bicarbonates of calcium and magnesium
- D. carbonates of sodium and potassium Discuss
- 3. The lowest yield of ATP /is in
Options- A. fermentation
- B. aerobic respiration
- C. anaerobic respiration
- D. same in (a), (b) and (c) Discuss
- 4. Micro filtration refers to the separation of suspended material such as bacteria by using a membrane with spore sizes of
Options- A. 0.02 to 10?m
- B. 1-10A°
- C. 20-30?m
- D. 10-200A° Discuss
- 5. The disk centrifuge is the type of centrifuge used most often for bio separations due to its
Options- A. continuous operation
- B. lesser cost
- C. higher speed
- D. ease in operation Discuss
- 6. A thixotropic fluid is one in which the viscosity
Options- A. is constant regardless of the stirrer speed or mixing time
- B. changes during mixing but returns to its original state after mixing
- C. increases with mixing time
- D. decreases with mixing time Discuss
- 7. The effect of increasing the stirrer speed in an unbaffled stirred tank reactor is that
Options- A. a small increase in stirrer speed will cause the liquid to enter the turbulent flow regime
- B. as the stirrer speed increases, the liquid will continue to circulate and then become turbulent
- C. as the stirrer speed increases, the liquid will continue to circulate. Eventually a vortex will form.
- D. A vortex will form at low stirrer speeds. As the stirrer speed increases the liquid will start to circulate Discuss
- 8. In wastewater treatment, which bioreactor is generally used?
Options- A. Plug flow reactor
- B. Trickle bed reactor
- C. Tower fermentor
- D. CSTR Discuss
- 9. Which of the following would be best described as an axial flow impeller?
Options- A. An impeller with blades pitched at 45° to the vertical
- B. An impeller which directs liquid flow towards the base of the reactor
- C. Both (a) and (b)
- D. An impeller with blades pitched at 75° to the vertical Discuss
- 10. Turbine impeller consists of flat impeller blades with
Options- A. a vertical pitch welded directly to the shaft
- B. a angled pitch welded directly to the shaft
- C. a vertical pitch welded to a horizontal disk
- D. a angled pitch welded to a horizontal disk Discuss
More questions
Correct Answer: 23 kg.h-1
Correct Answer: bicarbonates of calcium and magnesium
Correct Answer: fermentation
Correct Answer: 0.02 to 10?m
Correct Answer: lesser cost
Correct Answer: decreases with mixing time
Correct Answer: as the stirrer speed increases, the liquid will continue to circulate. Eventually a vortex will form.
Correct Answer: Trickle bed reactor
Correct Answer: Both (a) and (b)
Correct Answer: a vertical pitch welded to a horizontal disk
Comments
There are no comments.Programming
Copyright ©CuriousTab. All rights reserved.