standard constants take quiz exit 1 tonne 1 000 kg atomic masses c 12
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Standard constants:
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=
1 tonne 1,000 kg
Atomic masses: C = 12, H = 1, O=16, N =
14, S 32
T(°c) =T(K) - 273
R = universal gas constant = 8.314 J mol-1 K-1 =
==
1.987 cal mol 1 K-1
Question 1
2 pts
The bacterium Corynebacterium glutamicum has
been aerobically cultured in a batch fermenter
vessel on glucose at pH 7.0 and 20 °C to
produce Glutamic acid for the manufacture of
Mono Sodium Glutamate, a flavour compound
for the food industry. The time course data for a
typical batch culture of this bacterium in a
fermenter vessel are given below: Take quiz
typical batch culture of this bacterium in at
fermenter vessel are given below:
Cell
Time
Glucose Glutamic acic
(h)
concentration concentration concentration
(g 1-1)
(g 1-1)
(g 1-1)
1.222
100
0
5
1.492
98.0
2.5
10
1.649
97.0
7.5
15
2.719
90.4
20.0
20
4.482
76.9
34.0
25
7.390
48.1
43.0
30
12.183
20.6
47.5
35
20.086
3.4
48.0
40
21.250
1.1
48.3
45
21.260
0.1
48.5
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35
20.086
3.4
48.0
40
21.250
1.1
48.3
45
21.260
0.1
48.5
Based on the above data, determine the
maximum specific growth rate of
Corynebacterium glutamicum.
O 0.1 min 1
O 0.063 h-1
0.0034 min 1
O1s 1
O 0.08 g 1-1 s-1
0.003 h-1
O 0.1 h-1
O 0.74 h-1
21.2 s 1
none of the above Question 2
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...continuation from question above...
2 pts
The fermenter vessel is to be harvested for the
glutamic acid in the liquid phase, once the
carbon substrate (glucose) is completely
consumed. How many production scale
fermenters, each of 150 m³ operating liquid
volume, would be needed to make 10,000
tonnes per year of Glutamic acid? Each batch.
vessel is operated for the harvest time of
complete carbon substrate utilisation (45
hours), and takes an additional 3 hours to load
with liquid medium and inoculate with bacterial
culture, and 2 hours to drain and sterilise after
the aerobic batch fermentation. Take a process
year to be 325 days.
(Write in the box below the number of fermenter
vessels needed. Do not enter any text, only a
number)