During exponential phase in batch culture, the growth rate of a culture is proportional to the concentration of cells present. When Streptococcus lactis bacteria are cultured in milk, the concentration of cells doubles in45 min. If this rate of growth is maintained for 12 h, what is the final concentration of cells relative to the inoculum level?

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#Question id: 20012

#Section 5: Bioprocess Engineering and Process Biotechnology

A fed-batch reactor containing 2 litre of medium and 0.1 g.l^-l of biomass is fed with a medium containing 1 g.l^-1 of substrate at 1 litre per hour. If after 10 hours, the concentration of biomass in the reactor was 0.2 g.l^-1, then the biomass produced during the 10 hour period is

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#Question id: 20013

#Section 5: Bioprocess Engineering and Process Biotechnology

In fed batch bioreactor modelling, the rate of change in the bioreactor volume is assumed to be equal to

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#Question id: 20014

#Section 5: Bioprocess Engineering and Process Biotechnology

In plug flow tubular reactor the axial velocity profile on cross-section will be

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#Question id: 20015

#Section 5: Bioprocess Engineering and Process Biotechnology

The concentration of biomass in a continuous stirred tank reactor is 20 g dry weight per litre. What would be the concentration of biomass in the effluent?

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#Question id: 20043

#Section 4: Fundamentals of Biological Engineering

The exponential phase may be described by the equation _______

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#Question id: 20044

#Section 4: Fundamentals of Biological Engineering

In a batch sterilization process if ∇overall , ∇heating & ∇cooling are 32.2, 9.8 & 10.1 respectively, THEN the holding time at 121ºC of the process is (given that the specific death rate (k) of microorganisms at 121ºC is 2.54 min^-1 ):