#Question id: 14328
#Section 5: Bioprocess Engineering and Process Biotechnology
In a sewage-treatment plant, a large concrete tank initially
contains 440 000 litres liquid and 10 000 kg fine suspended solids. To flush
this material out of the tank, water is pumped into the vessel at a rate of 40
000 litres h- 1. Liquid containing solids leaves at the same rate. Estimate
the concentration of suspended solids in the tank at the end of 5
h._______________________.
#Question id: 2022
#Section 2: General Biology
Which one of the following is not true for class 1 MHC protein?
#Question id: 14393
#Section 1: Engineering Mathematics
If the system of equations 2x + 3y + 5 = 0, x + ky + 5 = 0, kx — 12y — 14 = 0 has non-trivial solution, then the value of k is
#Question id: 1950
#Section 2: General Biology
The inflammatory infiltrate in autoimmune thyroiditis comprises mostly:
#Question id: 14244
#Section 5: Bioprocess Engineering and Process Biotechnology
Ethanol is produced by anaerobic fermentation of glucose by Saccharomyces cerevisiae. For the particular strain of S. cerevisiae employed, the maintenance coefficient is 0.18 kg kg- 1 h- 1, Yxs is 0.11 kg kg-1, YPX is 3.9 kg kg-1 and µmax is 0.4 h-1. It is decided to investigate the possibility of using Zymomonas mobilis bacteria instead of yeast for making ethanol. Z. mobilis is known to produce ethanol under anaerobic conditions using a different metabolic pathway to that employed by yeast. Typical values of Yxs are lower than for yeast at about 0.06 kg kg-1; on the other hand, the maintenance coefficient is higher at 2.2 kg kg -1 h -1. Ypx for Z. mobilis is 7.7 kg kg-l; µmax is 0.3 h- 1. From stoichiometry, what is the maximum theoretical yield of ethanol from glucose