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This gas fermenter is operated as a continuous process where the gas inlet stream of 1 0 0 g h - 1 of mole fraction
This gas fermenter is operated as a continuous process where the gas inlet stream of
of mole fraction molecular weight with the remainder is injected
as microbubbles that are dispersed and dissolved in the fermentation media. A second inlet
stream is comprised of glucose which is anaerobically
decomposed to and ethanol:
An exit stream drains from the fermenter at constant rate so that the liquid volume in the
fermenter is unchanged. All streams and the fermenter have constant temperature
Presume that all the gas inlet stream is metabolized by the Clostridium ljungdahlii and all
glucose is converted to products. Draw a process diagram. List all your assumptions
necessary to write a material balance. Hint: Treat the outlet as two hypothetical streams
one coming from the endothermic gas fermentation and the other from the exothermic
catabolism of glucose.
Write overall materials and energy balances for the transformation from initial inputs
to outputs. Make assumptions about which terms are negligible. Write a mass
balance for each of ethanol, water, and
a Solve for the mass flow rates of all inlet and outlet streams. What is the cooling or
heating duty necessary to maintain the system temperature at
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