Consider the aerobic growth of yeast ( S. cerevisiae ) on glucose. The average biomass composition is represented by the formula $\text{CH} {1.8}\text{O} {0.5}\text{N}_{0.2}$. Ammonia ($\text{NH}_3$) is the nitrogen source. Write the stoichiometric equation if the yield of biomass from glucose is $0.5\text{ g/g}$. Eng Atrocious Empress Bad End Rj403033 - 3.79.94.248
A fermenter has a volumetric mass transfer coefficient ($k_L a$) of $100\text{ h}^{-1}$. The saturated dissolved oxygen concentration ($C^*$) is $7\text{ mg/L}$. The critical dissolved oxygen concentration for the cells to remain aerobic is $1\text{ mg/L}$. What is the maximum Oxygen Uptake Rate (OUR) the system can support without the dissolved oxygen falling below the critical level? Tabuada Do Ratinhopdf High Quality - 3.79.94.248
A batch culture of bacteria follows Monod kinetics with a maximum specific growth rate ($\mu_{max}$) of $0.8\text{ h}^{-1}$ and a saturation constant ($K_s$) of $0.2\text{ g/L}$. Calculate the specific growth rate ($\mu$) when the substrate concentration ($S$) is: a) $1.0\text{ g/L}$ b) $0.02\text{ g/L}$
Textbook Context: Bioprocess Engineering: Basic Concepts (Shuler & Kargi) Focus Areas: Unit Conversions, Stoichiometry, Material Balances, and Yield Coefficients. Problem 1: Unit Conversions & Physical Properties Concept: Many bioprocess calculations require converting between mass, volume, and molar amounts, often dealing with non-ideal units specific to biology (e.g., cells, enzymes).
$$ \mu = \mu_{max} \frac{S}{K_s + S} $$
A fermentation broth has a cell concentration of $15\text{ g/L}$ (dry weight). The fermenter operates with a working volume of $10,000\text{ liters}$. Calculate: a) The total mass of cells in the reactor (kg). b) If the cells are $70%$ water, what is the total wet weight of the biomass?