TLS Online TPP Program
More Questions
TLS Online TPP Program
#Question id: 21058
#Unit 12. Biochemical Engineering
Pseudomonas with the elemental composition of CH3O0.5N0.5 (MW = 30) is grown in a bioreactor to a final cell mass of 30 g/l. The minimum concentration (g/l) of ammonia (NH3) (MW = 17) (as the sole nitrogen source) required is:
TLS Online TPP Program
#Question id: 21060
#Unit 12. Biochemical Engineering
Acetobacter aceti converts alcohol to acetic acid according to the stoichiometric relation
C2H5OH + O2 → CH3COOH + H2O
In a vigorously agitated and aerated reactor containing 20 g/l ethanol, the organism produces 16 g/l acetic acid and 2 g/l was the residual ethanol concentration. What are the theoretical and observed yields of acetic acid expressed in g/g ethanol?
TLS Online TPP Program
#Question id: 21061
#Unit 12. Biochemical Engineering
A continuous stirred tank bioreactor produces 48 kg lysine.day-1. If the volumetric productivity is 2 g.l-1.h-1, the volume of the reactor is:
TLS Online TPP Program
#Question id: 21063
#Unit 12. Biochemical Engineering
To have an overall yield of greater than 50% in a three step purification process for a food additive, the minimum average step yield(%) necessary would be around:
TLS Online TPP Program
#Question id: 21065
#Unit 12. Biochemical 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 ):
TLS Online TPP Program
#Question id: 20830
#Unit 12. Biochemical Engineering
Consider the scale up of a fermentation from a 10 L to 10,000 L while maintaining geometric similarity. Agitation speed was maintained at 500 rpm in the 10 L fermenter. If scale up is done based on constant tip speed, then the agitation speed in the larger reactor should be ………….rpm