A baffled fermenter with tank diameter and liquid height equal to 1.2 m is stirred using a six-blade downward-pumping impeller. The impeller diameter is 0.42 m and the stirrer speed is 1.5 s. The viscosity of the fermentation broth is 10^-2 Pa s and the density is 1000 kg m-³. Estimate the mixing time under nonaerated conditions.

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#Question id: 14860

#Section 4: Fundamentals of Biological Engineering

A fermentation slurry containing Streptomyces kanamyceticus cells is filtered using a continuous rotary vacuum filter. 120 kg h^{- 1} slurry is fed to the filter; 1 kg slurry contains 60 g cell solids. To improve filtration rates, particles of diatomaceous-earth filter aid are added at a rate of 10 kg h^{- 1}. The concentration of kanamycin in the slurry is 0.05% by weight. Liquid filtrate is collected at a rate of 112 kg h^-1; the concentration of kanamycin in the filtrate is 0.045% (w/w). Filter cake containing cells and filter aid is continuously removed from the filter cloth.

 What percentage liquid is the filter cake?

TLS Online TPP Program

#Question id: 14861

#Section 4: Fundamentals of Biological Engineering

A fermentation slurry containing Streptomyces kanamyceticus cells is filtered using a continuous rotary vacuum filter. 120 kg h^{- 1} slurry is fed to the filter; 1 kg slurry contains 60 g cell solids. To improve filtration rates, particles of diatomaceous-earth filter aid are added at a rate of 10 kg h^{- 1}. The concentration of kanamycin in the slurry is 0.05% by weight. Liquid filtrate is collected at a rate of 112 kg h^-1; the concentration of kanamycin in the filtrate is 0.045% (w/w). Filter cake containing cells and filter aid is continuously removed from the filter cloth.

If the concentration of kanamycin in the filter-cake liquid is the same as in the filtrate, how much kanamycin is absorbed per kg filter aid?.,..... 10^-4

TLS Online TPP Program

#Question id: 14865

#Section 1: Engineering Mathematics

is equal to

TLS Online TPP Program

#Question id: 14866

#Section 1: Engineering Mathematics

TLS Online TPP Program

#Question id: 14867

#Section 1: Engineering Mathematics

 is equal to

TLS Online TPP Program

#Question id: 14868

#Section 1: Engineering Mathematics

If [x] denotes the greatest integer not greater than x, then  is