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TLS Online TPP Program

#Question id: 1959

How do people contract salmonella poisoning?

#Section 2: General Biology

  1. The microbe can survive the acidic environment of the stomach and resist lysosomal degradation in macrophages.

  2. The chemotactic messengers released by the salmonella bacterium do not attract sufficient neutrophils to entirely destroy the infection.

  3. There is a delay in selection of the population of eosinophils that recognize and are responsible for fighting these bacterial infections.

  4. The bacterium releases chemical messengers that make it resistant to phagocytosis.

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TLS Online TPP Program

#Question id: 14188

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of an organic compound by a mixed culture of organisms in waste water can be represented by the following reaction

               

Determine the degree of reductions for the substrate

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TLS Online TPP Program

#Question id: 14189

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of an organic compound by a mixed culture of organisms in waste water can be represented by the following reaction

               

Determine the degree of reductions for bacteria.

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TLS Online TPP Program

#Question id: 14190

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of an organic compound by a mixed culture of organisms in waste water can be represented by the following reaction

               

Determine RQ for the organisms

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TLS Online TPP Program

#Question id: 14191

#Section 5: Bioprocess Engineering and Process Biotechnology

Consider a 1000-l CSTR in which biomass is being produced with glucose as the substrate. The microbial system follows a Monod relationship withn µm = 0.4 h-1 , KS = 1.5 g/l (an unusu ally high value), and the yield factor YX/S = 0.5 g biomass/g substrate consumed. If normal operation is with a sterile feed containing 10 g/l glucose at a rate of 100 l/h. What is the specific biomass production rate (g/l-h) at steady state?

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TLS Online TPP Program

#Question id: 14192

#Section 5: Bioprocess Engineering and Process Biotechnology

In a two-stage chemostat system, the volumes of the first and second reactors are V1 = 500 l and V2 = 300 l, respectively. The first reactor is used for biomass production and the second is for a secondary metabolite formation. The feed flow rate to the first reactor is F = 100 l/h, and the glucose concentration in the feed is S = 5.0 g/l. Use the following constants for the cells.



Determine cell concentration in the effluent of the first stage.

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TLS Online TPP Program

#Question id: 14193

#Section 5: Bioprocess Engineering and Process Biotechnology

In a two-stage chemostat system, the volumes of the first and second reactors are V1 = 500 l and V2 = 300 l, respectively. The first reactor is used for biomass production and the second is for a secondary metabolite formation. The feed flow rate to the first reactor is F = 100 l/h, and the glucose concentration in the feed is S = 5.0 g/l. Use the following constants for the cells.



Determine glucose concentration in the effluent of the first stage. _____________________