Fermentation Reactors Questions

• A Bacillus sp. produces an antibiotic only during the stationary phase when grown in a batch culture. If grown in a 5 litre continuous culture, the steady state productivity of the antibiotic
• Mixing per unit volume is observed to be poorest in
• A continuous reactor has a dilution rate of 0.5 h-1. Its residence time would be
• Formation of end product by Lactococcus lactis will become non-growth associated as lactic acid accumulates because
• Yield coefficient represents
• A continuous bioreactor in which only the flow rate is used to control the rate of cell or product productivity is called
• If biomass yields are constant, then the biomass productivity of a culture grown in continuous reactor will
• A fed-batch reactor initially contains 2 litre of medium. If it was fed at 1 litre per hour, then after 10 hours, the volume of the reactor will be
• When two populations compete for a single growth limiting substrate in a continuous fermenter, which organism would not be washed out?
• In fed-batch fermentation, mass of substrate utilized is calculated using the relationship
• Saccharomyces cerevisiae is being grown in a chemostat converts glucose to biomass, ethanol, glycerol and carbon dioxide. At steady state, the concentration of glucose, biomass, ethanol and glycerol will
• Which of the statement is true for continuous reactor at steady state?
• Which of the following is used to calculate mass of substrate in the reactor?
• Mixing in an anaerobic sludge blanket reactor is due to
• Fluidized bed bioreactors provide higher mass transfer rates than packed bed bioreactors because
• Low dissolved oxygen concentrations leads to
• In aerobic yeast fermentation for production of citric acid from alkanes using a fed-batch culture, why alkanes are slowly fed to the yeast?
• Immobilized cell reactors for wastewater treatment have the advantage of having/being
• The growth of an organism on glucose is described by the following Monod model parameters: μm = 0.5 h-1 and Ks =0.1 g.l-1, if the concentration of glucose in the feed is 10 g.l-1 and the dilution rate is set to 0.4 h-1, then the steady state concentration of glucose in the effluent will be
• The lowest yield of ATP /is in