Which one of the following factors does not influence the rate of oxygen transfer in an aerobic fermentation system ?

#Question id: 14334

#Part-B Specialized Branches in Biotechnology

Laboratory-scale fermenters are usually mixed using small stirrers with electric motors rated between 100 and 500 W. One such motor is used to drive a 7cm turbine impeller in a small reactor containing fluid with the properties of water. The stirrer speed is 900 rpm. Estimate the power requirements for this process.

#Question id: 14336

#Part-B Specialized Branches in Biotechnology

A cylindrical stirred bioreactor of diameter and height 2 m has a Rushton turbine one-third the tank diameter in size. The bioreactor contains Newtonian culture broth with the same density as water and with viscosity 4 cP. The tank is now aerated. In the presence of gas bubbles, the approximate relationship between ungassed power number (N_P)₀ and gassed power number (N_P)g is: (N_P)g =0.5 (N_P)₀. What maximum stirrer speed is now possible in the sparged reactor? Estimate the mixing time.

#Question id: 14338

#Part-B Specialized Branches in Biotechnology

Quasi steady state condition is 

#Question id: 14340

#Part-B Specialized Branches in Biotechnology

#Question id: 14369

#Part-B Specialized Branches in Biotechnology

If the value of the determinant

then the value of

#Question id: 14427

#Part-B Specialized Branches in Biotechnology