A fermenter is maintained at 35⁰C by water circulating at a rate of 0.5 kg s^-1 in a cooling coil inside the vessel. The inlet and outlet temperatures of the water are 8⁰C and 15⁰C respectively. The length of the cooling coil is increased by 50%. In order to maintain the same fermentation temperature, the rate of heat removal must be kept the same. Determine the new cooling-water flow rate and outlet temperature by carrying out the following calculations. The heat capacity of the cooling water can be taken as 4.18 kJ kg^- 1 o C^- 1. If the length of the coil is increased by 50⁰C the area available for heat transfer, A ', also increases by 50% so that A' = 1.5 A. The value of the overall heat-transfer coefficient is not expected to change very much. For the new coil, what is the value of UA’  ______________

TLS Online TPP Program

#Question id: 21006

#Section 4: Fundamentals of Biological Engineering

Match the group 1 with appropriate description of group 2.

Group 1                                                  group 2

(P) Pectinases                                    (1) Meat tenderizer

(Q) Lipases                                         (2) clarification of fruit juice

(R) Amylases                                      (3) cheese and butter industry

(S) Trypsin                                           (4) starch-liquefying enzyme

TLS Online TPP Program

#Question id: 21007

#Section 4: Fundamentals of Biological Engineering

Role of Glucose isomerase enzymes is 

TLS Online TPP Program

#Question id: 21008

#Section 4: Fundamentals of Biological Engineering

Which of the following statement is correct for defined media?

TLS Online TPP Program

#Question id: 21009

#Section 4: Fundamentals of Biological 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: 21010

#Section 4: Fundamentals of Biological Engineering

During a batch culture experiment, the following data was obtained 

What will be the product yield (g) per gram of substrate? 

TLS Online TPP Program

#Question id: 21011

#Section 4: Fundamentals of Biological Engineering

The degree of reduction of ethanol is-