#Question id: 14277
#Section 5: Bioprocess Engineering and Process Biotechnology
Lactobacillus casei is propagated under essentially
anaerobic conditions to provide a starter culture for manufacture of Swiss cheese.
The culture produces lactic acid as a by-product of energy metabolism. The
system has the following characteristics:
A stirred fermenter is operated in fed-batch mode at
quasisteady state with a feed flow rate of 4 m3 h-1 and
feed substrate concentration of 80 kg m-3. After 6 h, the liquid
volume is 40 m3. What mass of cells is produced after 6 h fed-batch
operation?
__________________
#Question id: 14278
#Section 5: Bioprocess Engineering and Process Biotechnology
Stirrer has a power number (Np) 10. If the stirrer speed (N) is 1s^-1, its diameter D=1m and the density of the medium is 1000 kg/m^3, the ungassed power input (P) in watts is
#Question id: 14279
#Section 5: Bioprocess Engineering and Process Biotechnology
#Question id: 14280
#Section 5: Bioprocess Engineering and Process Biotechnology
#Question id: 14281
#Section 5: Bioprocess Engineering and Process Biotechnology
cells are grown in a CSTR a steady state at two dilution rates 0.1 h^-1 and 0.5h^-1 and the steady state concentrations are as follows:
if the inlet substrate concentration is 20 g/I, the cells follow monod growth kinetics and product formation kinetics is modelled as a both growth associated and non growth associated kinetics given by the equation then answer the following questions, the best estimate of maximum specific growth rate is:
#Question id: 14282
#Section 5: Bioprocess Engineering and Process Biotechnology