Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
Time (min) Degassed tank -1 Air on 0 1 Oxygen uptake rates (OUR) and oxygen transfer rates (OTR) were determined in a fermenter with air bubbled through a bioreactor to supply oxygen for the growth of Candida utilis yeast. In the first set of data below, the fermenter is filled with growth media (aqueous solution) but no cells, and is degassed, removing all oxygen, then at time zero, air enters through the sparge at the bottom of the tank, and the dissolved oxygen (DO) level is measured as a function of time. A second experiment is done with the same fermenter, where the cells are growing in the fermenter at steady state in the stationary phase, and at time zero, the air is cut off, and the DO level is measured for a few minutes before the air is turned on again. The saturation dissolved oxygen concentration (C*) for the conditions used was 4.2 mg/L. Using the measured DO values, determine: A. the maximum oxygen transfer rate, OTR (which occurs when there is no dissolved oxygen) INITIAL STATE Tank filled with growth ← media (no cells) Cells in tank reach steady state concentration Time DO level (mg/L) (min) DO level (mg/L) 0 -1 4.2 0 Air off 0 4.2 0.56 1 4.12 B. the volumetric transfer 2 1.01 2 4.03 coefficient, ka 3 1.43 3 3.91 C. the oxygen uptake rate, 4 1.88 4 3.77 OUR, for the reactor with 5 2.21 5 3.64 cells at steady state 6 2.58 6 3.51 7 2.87 Air on 7 3.35 8 3.14 8 3.46 9 3.35 10 3.51 11 3.65 12 3.78 13 3.9 14 3.995 15 4.07 16 4.13 17 4.17 18 4.2

Time (min) Degassed tank -1 Air on 0 1 Oxygen uptake rates (OUR) and oxygen transfer rates (OTR) were determined in a fermenter with air bubbled through a bioreactor to supply oxygen for the growth of Candida utilis yeast. In the first set of data below, the fermenter is filled with growth media (aqueous solution) but no cells, and is degassed, removing all oxygen, then at time zero, air enters through the sparge at the bottom of the tank, and the dissolved oxygen (DO) level is measured as a function of time. A second experiment is done with the same fermenter, where the cells are growing in the fermenter at steady state in the stationary phase, and at time zero, the air is cut off, and the DO level is measured for a few minutes before the air is turned on again. The saturation dissolved oxygen concentration (C*) for the conditions used was 4.2 mg/L. Using the measured DO values, determine: A. the maximum oxygen transfer rate, OTR (which occurs when there is no dissolved oxygen) INITIAL STATE Tank filled with growth ← media (no cells) Cells in tank reach steady state concentration Time DO level (mg/L) (min) DO level (mg/L) 0 -1 4.2 0 Air off 0 4.2 0.56 1 4.12 B. the volumetric transfer 2 1.01 2 4.03 coefficient, ka 3 1.43 3 3.91 C. the oxygen uptake rate, 4 1.88 4 3.77 OUR, for the reactor with 5 2.21 5 3.64 cells at steady state 6 2.58 6 3.51 7 2.87 Air on 7 3.35 8 3.14 8 3.46 9 3.35 10 3.51 11 3.65 12 3.78 13 3.9 14 3.995 15 4.07 16 4.13 17 4.17 18 4.2

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
See similar textbooks
icon
Related questions
Question
Time (min) Degassed tank -1 Air on 0 1 Oxygen uptake rates (OUR) and oxygen transfer rates (OTR) were determined in a fermenter with air bubbled through a bioreactor to supply oxygen for the growth of Candida utilis yeast. In the first set of data below, the fermenter is filled with growth media (aqueous solution) but no cells, and is degassed, removing all oxygen, then at time zero, air enters through the sparge at the bottom of the tank, and the dissolved oxygen (DO) level is measured as a function of time. A second experiment is done with the same fermenter, where the cells are growing in the fermenter at steady state in the stationary phase, and at time zero, the air is cut off, and the DO level is measured for a few minutes before the air is turned on again. The saturation dissolved oxygen concentration (C*) for the conditions used was 4.2 mg/L. Using the measured DO values, determine: A. the maximum oxygen transfer rate, OTR (which occurs when there is no dissolved oxygen) INITIAL STATE Tank filled with growth media (no cells) Cells in tank reach steady state concentration Time DO level (mg/L) (min) DO level (mg/L) 0 -1 4.2 0 Air off 0 4.2 0.56 1 4.12 B. the volumetric transfer 2 1.01 2 4.03 coefficient, ka 3 1.43 3 3.91 C. the oxygen uptake rate, 4 1.88 OUR, for the reactor with 5 2.21 45 3.77 3.64 cells at steady state 6 2.58 6 3.51 7 2.87 Air on 7 3.35 8 3.14 8 3.46 9 3.35 10 3.51 11 3.65 12 3.78 13 3.9 14 3.995 15 4.07 16 4.13 17 4.17 18 4.2
Transcribed Image Text:Time (min) Degassed tank -1 Air on 0 1 Oxygen uptake rates (OUR) and oxygen transfer rates (OTR) were determined in a fermenter with air bubbled through a bioreactor to supply oxygen for the growth of Candida utilis yeast. In the first set of data below, the fermenter is filled with growth media (aqueous solution) but no cells, and is degassed, removing all oxygen, then at time zero, air enters through the sparge at the bottom of the tank, and the dissolved oxygen (DO) level is measured as a function of time. A second experiment is done with the same fermenter, where the cells are growing in the fermenter at steady state in the stationary phase, and at time zero, the air is cut off, and the DO level is measured for a few minutes before the air is turned on again. The saturation dissolved oxygen concentration (C*) for the conditions used was 4.2 mg/L. Using the measured DO values, determine: A. the maximum oxygen transfer rate, OTR (which occurs when there is no dissolved oxygen) INITIAL STATE Tank filled with growth media (no cells) Cells in tank reach steady state concentration Time DO level (mg/L) (min) DO level (mg/L) 0 -1 4.2 0 Air off 0 4.2 0.56 1 4.12 B. the volumetric transfer 2 1.01 2 4.03 coefficient, ka 3 1.43 3 3.91 C. the oxygen uptake rate, 4 1.88 OUR, for the reactor with 5 2.21 45 3.77 3.64 cells at steady state 6 2.58 6 3.51 7 2.87 Air on 7 3.35 8 3.14 8 3.46 9 3.35 10 3.51 11 3.65 12 3.78 13 3.9 14 3.995 15 4.07 16 4.13 17 4.17 18 4.2
Expert Solution
steps

Step by step

Solved in 5 steps with 12 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS