4. A fluidized-bed, immobilized-cell bioreactor is used for the conversion of glucose to ethanol by Z.mobilis cells immo

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4 A Fluidized Bed Immobilized Cell Bioreactor Is Used For The Conversion Of Glucose To Ethanol By Z Mobilis Cells Immo 1 (70.85 KiB) Viewed 19 times

4. A fluidized-bed, immobilized-cell bioreactor is used for the conversion of glucose to ethanol by Z.mobilis cells immobilized in K-carrageenan gel beads. The dimensions of the bed are 10cm (diameter) by 200 cm. Since the reactor is fed from the bottom of the column and because of CO₂ gas evolution, cell concentrations decrease with the height of the column. The average cell concentration at the bottom of the column is [X]. = 45g/L and the average cell concentration decreases with the column height according to the following equation: X=X, (1-0.005Z) where Z is the column height (cm). The specific rate of substrate consumption is q=2 g substrate /g cells h. The feed flow rate and glucose concentration in the feed are 5L/h and 160 g glucose/L, respectively. a) determine the substrate concentration in the effluent b) Determine the ethanol concentration in the effluent if Yp/s =0.48 g eth/g glu.