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Biochemical Engineering - Downstream Processing

Exercise : Downstream Processing - Section 1
  • Downstream Processing - Section 1
6.
Maintenance cost varies from
0-4% of the capital cost
12-16% of the capital cost
4-8% of the capital cost
8-12% of the capital cost
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
The optimum wet solid content for the cell suspension for a bead mill is typically somewhere between
5-15% by volume
15-30% by volume
30-60% by volume
60-90% by volume
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Assuming the laminar flow across the filter, the rate of filtration (dVf/dt) can be expressed as a function of pressure drop Dp by the modified D'Arcy's equation as (where A is the area of filtering surface, K is the D'Arcy's filter cake permeability and L is the thickness of the filter cake)
(1/A) dVf/dt = Δp/μ(L/K)
dVf/dt = (1/A)Δp/μ(L/K)
(1/A) dVf/dt = Δp/μ LK
dVf/dt = (1/A)Δp/μ LK
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Filtration leaf test results indicate that the filtration rate of a protein product is 100 dry lbs/(ft2 hr). What size production filter would be required to obtain 100 dry lbs of filter cake/hr?
1.54 ft2
3.08 ft2
65 ft2
65 lbs/ ft2.hr
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Selectivity can be expressed as
ratio of the distribution coefficients in different solute
mass fraction of the solute in the extract phase at equilibrium
mass fraction of the solute in the raffinate phase
ratio of the mass fraction of the solute in the extract phase to the raffinate phase
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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