A waste-water stream of F = 1 m3 /h with substrate at 2000 mg/l is treated in an upflow packed bed containing immobilized bacteria in form of biofilm on small ceramic particles. The effluent substrate level is desired to be 30 mg/l. The rate of substrate removal is given by the following equation

                   

By using the following information, determine the required height of the column (H). k = 0.5 h-1, X = 10 g/l, Ks = 200 mg/l, L = 0.2 mm, α = 100 m2 /m3 , A = 4 m2 , η = 0.8

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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 ):