#Question id: 14537
#Section 1: Engineering Mathematics
evaluates to
#Question id: 14517
#Section 1: Engineering Mathematics
#Question id: 14202
#Section 5: Bioprocess Engineering and Process Biotechnology
In a fluidized-bed biofilm reactor, cells are attached on
spherical plastic particles to form biofilms of average thickness L = 0.5 mm.
The bed is used to remove carbon compounds from a waste-water stream. The feed
flow rate and concentration of total fermentable carbon compounds in the feed
are F = 2 l/h and S = 2000 mg/l. The diameter of the column is 10 cm. The
kinetic constants of the microbial population are rm = 50 mg S/cm3.
h and KS = 25 mg S/cm3 . The specific surface area of the
biofilm in the reactor is 2.5 cm2 /cm3 . Assuming
first-order reaction kinetics and an average effectiveness factor of n = 0.7
throughout the column, determine the required height of the column for effluent
total carbon concentration of S0i = 100 mg/l.
#Question id: 355
#Section 4: Fundamentals of Biological Engineering
Measurements show that the pH of a particular lake is 4.0. What is the hydroxide ion concentration of the lake?
#Question id: 3778
#Section 3: Genetics, Cellular and Molecular Biology
Which of the following effects might be caused by reduced or very little active telomerase activity?