en gas, continuous air supply at air fl

Biomedical Instrumentation Systems
1st Edition
ISBN:9781133478294
Author:Chatterjee
Publisher:Chatterjee
Chapter15: Instrumentation In Medical Imaging
Section: Chapter Questions
Problem 1P
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In cultivation of E.coli strain in a batch stirred and aerated tank, a static gassing out technique
method was employed to determine the oxygen transfer coefficient (k̟a) for the bioreactor.
After purging the oxygen with nitrogen gas, continuous air supply at air flow rate of 0.1
v.v.m. and impeller speed of about 250 rpm was initiated. Increase in the dissolved oxygen
concentration upon the continuous air sparging is recorded by a dissolved oxygen (DO)
probe. Using the following data, determine the oxygen transfer coefficient (ka) for the
bioreactor. Saturation DO concentration is C*=9 mg/l
Time (minute)
Cl (mg/l)
1
1
2
3
2.5
4
3
5
4
6.5
5
7.2
Transcribed Image Text:In cultivation of E.coli strain in a batch stirred and aerated tank, a static gassing out technique method was employed to determine the oxygen transfer coefficient (k̟a) for the bioreactor. After purging the oxygen with nitrogen gas, continuous air supply at air flow rate of 0.1 v.v.m. and impeller speed of about 250 rpm was initiated. Increase in the dissolved oxygen concentration upon the continuous air sparging is recorded by a dissolved oxygen (DO) probe. Using the following data, determine the oxygen transfer coefficient (ka) for the bioreactor. Saturation DO concentration is C*=9 mg/l Time (minute) Cl (mg/l) 1 1 2 3 2.5 4 3 5 4 6.5 5 7.2
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