A waste-water stream of F = 1 m3 /h with substrate at 2000 mg/l is treated in an upflow packed bed containing immobilized bacteria in form of biofilm on small ceramic particles. The effluent substrate level is desired to be 30 mg/l. The rate of substrate removal is given by the following equation

                   

By using the following information, determine the required height of the column (H). k = 0.5 h-1, X = 10 g/l, Ks = 200 mg/l, L = 0.2 mm, α = 100 m2 /m3 , A = 4 m2 , η = 0.8

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#Question id: 21005

#Section 4: Fundamentals of Biological Engineering

Which of the following graph represent substrate inhibition?

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

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#Question id: 21007

#Section 4: Fundamentals of Biological Engineering

Role of Glucose isomerase enzymes is 

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#Question id: 21008

#Section 4: Fundamentals of Biological Engineering

Which of the following statement is correct for defined media?

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#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? 

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#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?