During which phase of the bacterial growth curve does the total number of viable cells decline?

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#Question id: 15623

#Part-B Specialized Branches in Biotechnology

Under unaerated condition in a fermentor, the power consumed by a single impeller was 10,000 W. The diameter of the impeller D is 1m and the density of the medium is 1000 kg/m3 and the stirrer speed is 1s^-1. If one more impeller is added to the fermentor, power consumption would be approximately

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#Question id: 15624

#Part-B Specialized Branches in Biotechnology

In heat transfer through a heat exchanger in co- current or counter-current flow, which of the assumptions is not correct ?

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#Question id: 15625

#Part-B Specialized Branches in Biotechnology

A stagnant liquid film of 0.4 mm thickness is held between two parallel plates. The top plate is maintained at 400C and the bottom plate is maintained at 300C. If

the thermal conductivity of the liquid is 0.14 W/(m K), then the steady state heat flux ( W/m²) assuming one-dimensional heat transfer is

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#Question id: 15626

#Part-B Specialized Branches in Biotechnology

In a mass transfer system the unit of diffusivity is

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#Question id: 15627

#Part-B Specialized Branches in Biotechnology

A fermentation medium is being cooled from 70^0C to 32^0C in a double pipe heat exchanger. Fluid flowing counter currently with this stream in heated from 20^0C

to 46^0C. The log mean temperature difference (in0C) for the two streams is

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#Question id: 15628

#Part-B Specialized Branches in Biotechnology

When a liquid of density 1200 kg/m3 and viscosity 0.01 kg m^-1s^-1 flows through a 1 cm Diameter pipe at 0.2 m/s, the flow is referred as a