Yeast is used to produce a direct-energy-coupled extracellular product (P) using

Question

Yeast is used to produce a direct-energy-coupled extracellular product (P) using glucose as the carbon source that can be described by the following chemical equation. 1.14 moles of CO2 and 2.6 moles of water are produced per mole of glucose consumed.

C6H12O6 + b NH3 + a O2 —> c CH1.8O0.5N0.2 (biomass) + d C3H6O3 (P) + e H2O + f CO2

What is the yield of biomass from substrate (YXS) in molar units?

Stoichiometry. Yeast is used to produce a direct-energy-coupled extracellular product (P) using glucose as the carbon source that can be described by the following chemical equation. 1.14 moles of CO2 and 2.6 moles of water are produced per mole of glucose consumed. 12 b NH3 a O2 c CH18 oo.5No.2 (biomass) +d C3H603 (P) e H20+ f CO What is the yield of biomass from substrate (Yxs) n molar units?

Explanation / Answer

C6H12O6 + b NH3 + a O2 —> c CH1.8O0.5N0.2 (biomass) + d C3H6O3 (P) + e H2O + f CO2

c CH1.8O0.5N0.2 (biomass) + d C3H6O3 (P) + f CO2 = C6

Since 1.14 moles of CO2 and 2.6 moles of water are produced per mole of glucose consumed.

f = 1.14 and e = 2.6

cCH1.8 + dC3H6 = C4.86 (6-1.14)

So c = 1.03 when d = 1

So the yield of biomass is 1.03 moles / moles of glucose consumed

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