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Consider the production of lactic acid from lactose by a fermentation process with the =toichiometry given by this reaction. 25C12H22O11 + 7H2O + 6NH3 6C5H¬O2N + 90C;H6O3 lactic acid lactose biomass The feed stream contains 2000 kg water, 1.3 kg ammonia, and S kg of lactose. The product stream contains water, biomass, and lactic acid. Let P denote the total mass of the product stream in kg. The mass fraction of lactic acid in the product stream is 0.05. (a) Sketch a diagram of the process and label it with the given information and unknowns. (b) Calculate the yield of lactic acid on substrate (lactose), YLs. Give your answer in kg lactic acid per kg of lactose. (c) Write the total mass balance around the fermenter including S and P as unknowns.

Consider the production of lactic acid from lactose by a fermentation process with the =toichiometry given by this reaction. 25C12H22O11 + 7H2O + 6NH3 6C5H¬O2N + 90C;H6O3 lactic acid lactose biomass The feed stream contains 2000 kg water, 1.3 kg ammonia, and S kg of lactose. The product stream contains water, biomass, and lactic acid. Let P denote the total mass of the product stream in kg. The mass fraction of lactic acid in the product stream is 0.05. (a) Sketch a diagram of the process and label it with the given information and unknowns. (b) Calculate the yield of lactic acid on substrate (lactose), YLs. Give your answer in kg lactic acid per kg of lactose. (c) Write the total mass balance around the fermenter including S and P as unknowns.

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
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Consider the production of lactic acid from lactose by a fermentation process with the stoichiometry given by this reaction. 25C12H22011 + 7H2O + 6NH3 → 6C5H¬O2N + 90C3H6O3 lactose biomass lactic acid The feed stream contains 2000 kg water, 1.3 kg ammonia, and S kg of lactose. The product stream contains water, biomass, and lactic acid. Let P denote the total mass of the product stream in kg. The mass fraction of lactic acid in the product stream is 0.05. (a) Sketch a diagram of the process and label it with the given information and unknowns. (b) Calculate the yield of lactic acid on substrate (lactose), YLs. Give your answer in kg lactic acid per kg of lactose. (c) Write the total mass balance around the fermenter including S and P as unknowns. (d) Find the required amount of lactose, S. Tip: write a balance on lactic acid around the fermenter. For the generation term in this balance use the expression SYLS.
Transcribed Image Text:Consider the production of lactic acid from lactose by a fermentation process with the stoichiometry given by this reaction. 25C12H22011 + 7H2O + 6NH3 → 6C5H¬O2N + 90C3H6O3 lactose biomass lactic acid The feed stream contains 2000 kg water, 1.3 kg ammonia, and S kg of lactose. The product stream contains water, biomass, and lactic acid. Let P denote the total mass of the product stream in kg. The mass fraction of lactic acid in the product stream is 0.05. (a) Sketch a diagram of the process and label it with the given information and unknowns. (b) Calculate the yield of lactic acid on substrate (lactose), YLs. Give your answer in kg lactic acid per kg of lactose. (c) Write the total mass balance around the fermenter including S and P as unknowns. (d) Find the required amount of lactose, S. Tip: write a balance on lactic acid around the fermenter. For the generation term in this balance use the expression SYLS.
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