To ensure turbulent conditions and minimum mixing time during agitation with a turbine impeller, the Reynolds number must be at least 10⁴. A stirred laboratory-scale fermenter with a turbine impeller 5 cm in diameter is operated at 800 rpm. If the density of broth being stirred is close to that of water. The mixing system is scaled up so the tank and impeller are 15 times the diameter of the laboratory equipment. The stirrer in the large vessel is operated so that the stirrer tip speed (tip speed = π N i D i) is the same as in the laboratory apparatus. How does scale-up affect the maximum viscosity. 

TLS Online TPP Program

#Question id: 15483

#I Life Science/ Life Sciences Group – I-V

A novel technique for strain improvement combining the advantage of multi-parental crossing allowed by DNA shuffling with the recombination of entire genomes.

TLS Online TPP Program

#Question id: 18862

#SCPH01 Biochemistry

What is the shortest distance that the eye must go to concentrate on any object?

TLS Online TPP Program

#Question id: 9229

#SCPH28 | Zoology

Which of the following is a generally accurate statement about the current research regarding forest fragmentation?

TLS Online TPP Program

#Question id: 4568

#SCPH05 I Biotechnology

 In Darwinʹs thinking, the more closely related two different organisms are, the

TLS Online TPP Program

#Question id: 5239

#SCPH05 I Biotechnology

Which of the following statements is not true for Hfr strains of E. coli ?