![]() ![]() According to the bioreactor simulation, there is a strong dependency of process performance on mass transfer rates. ResultsĮstimations made using the thermodynamics-based black-box model of microbial reactions on substrate threshold concentrations, biomass yields, as well as CO and H 2 maximum specific uptake rates agreed reasonably well with data and observations reported in literature. The present study describes the construction of a hybrid model for simulating ethanol production inside a 700 m 3 bubble column bioreactor fed with gas of two possible compositions, i.e., pure CO and a 3:1 mixture of H 2 and CO 2. However, quantitative schemes for understanding and predicting productivities, yields, mass transfer rates, gas flow profiles and detailed energy requirements have been lacking in literature such are invaluable tools for process improvements and better systems design. Ethanol production through fermentation of gas mixtures containing CO, CO 2 and H 2 has just started operating at commercial scale.
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