An organism obeys Andrews model for growth inhibition with Ks and Ki values of 0.01 g/l and 1.0 g/l respectively. If the substrate is present at an initial concentration of 1.0g/l, the specific growth rate of the culture upon entering log phase would be approximately:

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#Question id: 31854

#Unit 12. Biochemical Engineering

The penicillin extraction process involves the following steps:

A. Extraction from the organic solvent into an aqueous buffer

B. Extraction from the aqueous buffer into an organic solvent

C. Extraction of penicillin from the filtered broth into organic solvent

D. Extraction of solvent to obtain penicillin salt

Choose the correct sequence of steps from the options given below :

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#Question id: 31858

#Unit 12. Biochemical Engineering

If the partitioning coefficient (K) of a solute is 20 when it is extracted by an organic solvent from culture medium, what is the amount of solvent required per litre of culture medium to extract 90% of the solute in a single equilibrium stage? 

TLS Online TPP Program

#Question id: 31890

#Unit 12. Biochemical Engineering

The efficiency of an organic sludge composting method can be improved by various physicochemical options. Which one of the following is NOT a recommended option for the same?

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#Question id: 26692

#Unit 12. Biochemical Engineering

In a single stage continuous extraction system. solvent is added to cell-free culture filtrate containing the product. If the partition coefficient of the product is 5. then to extract 90% of the product, assuming ideal single stage, the flow rate of solvent should be times the flow rate of the culture filtrate.

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#Question id: 26724

#Unit 12. Biochemical Engineering

A batch reactor produces 25g/L of product. The fermentation time is 4 days and 1 day extra is required as downtime for cleaning, sterilization and setting up the reactor. If total number of working days is taken at 300 days/year. Then to produce 1 ton/year of product the reactor size has to be approximately

TLS Online TPP Program

#Question id: 26739

#Unit 12. Biochemical Engineering

A student decided to perform liquid-liquid extraction of solute A and solute B separately. Based on the table below, indicate which of the following options is CORRECT about their partition coefficient (K)?

	Solute A	Solute B
Concentration of solute in extract (g/L)	50	1
Concentration of solute in raffinate (g/L)	1	50