In a bioreactor, anaerobic grain fermentation takes place, in which the yeast Saccharomyces cerevisiae metabolizes glucose (C6H1206) to form the products ethanol and propionic acid (C2H3CO2H), according to the following reactions: C6H1206 -> 2C2H5OH + 2CO2 C6H1206 -> 2 C2H3CO2H + 2H2O In this process, the tank is initially loaded with 4000 kg of a 12% glucose solution in water. After fermentation, 120 kg of CO2 were produced and 90 kg of unconsumed glucose remained in the wort. What is the mass percentage of ethanol and propionic acid in the wort at the end of the fermentation process? The yeast mass in the wort is negligible.

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
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Question about mass and energy balances:

In a bioreactor, anaerobic grain fermentation
takes place, in which the yeast Saccharomyces
cerevisiae metabolizes glucose (C6H1206) to
form the products ethanol and propionic acid
(C2H3CO2H), according to the following
reactions:
C6H1206 -> 2C2H5OH + 2CO2
C6H1206 -> 2 C2H3CO2H + 2H2O
In this process, the tank is initially loaded with
4000 kg of a 12% glucose solution in water. After
fermentation, 120 kg of CO2 were produced and
90 kg of unconsumed glucose remained in the
wort. What is the mass percentage of ethanol
and propionic acid in the wort at the end of the
fermentation process? The yeast mass in the
wort is negligible.
Transcribed Image Text:In a bioreactor, anaerobic grain fermentation takes place, in which the yeast Saccharomyces cerevisiae metabolizes glucose (C6H1206) to form the products ethanol and propionic acid (C2H3CO2H), according to the following reactions: C6H1206 -> 2C2H5OH + 2CO2 C6H1206 -> 2 C2H3CO2H + 2H2O In this process, the tank is initially loaded with 4000 kg of a 12% glucose solution in water. After fermentation, 120 kg of CO2 were produced and 90 kg of unconsumed glucose remained in the wort. What is the mass percentage of ethanol and propionic acid in the wort at the end of the fermentation process? The yeast mass in the wort is negligible.
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