FirstRanker.com
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION — SUMMER 2019
--- Content provided by FirstRanker.com ---
Subject Code:2170407 Date:16/05/2019Subject Name:Biochemical Engineering-I
Time:02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
MARKS
Q.1 (a) What is role of bioprocess engineer in an industry? [03]
(b) Explain difference between steady state and equilibrium. [04]
--- Content provided by FirstRanker.com ---
(c) A continuous process is set up for treatment of wastewater. Each day, [07]103 kg cellulose and 105 kg bacteria enter in the feed stream, while 104 kg cellulose and 1.5 x 104 kg bacteria leave in the effluent. The rate of cellulose digestion by the bacteria is 7 x104 kg d-1. The rate of bacterial growth is 2 x 104 kg d-1; the rate of cell death by lysis is 5 x 103 kg d-1. Write balances for cellulose and bacteria in the system.
Q.2 (a) Explain the terms intensive and extensive properties. [03]
(b) Explain the term Heat of combustion. [04]
(c) Corn-steep liquor contains 2.5 % invert sugars and 50% water; the rest can be considered solids. Beet molasses containing 50% sucrose, 1% invert sugars, 18% water and the remainder solids is mixed with corn-steep liquor in a mixing tank. Water is added to produce a diluted sugar mixture containing 2% (w/w) invert sugars. 125 kg corn-steep liquor and 45 kg molasses are fed into the tank. [07]
--- Content provided by FirstRanker.com ---
(a) How much water is required?(b) What is the concentration of sucrose in the final mixture?
OR
(c) Water at 25°C enters an open heating tank at a rate of 10 kg h-1. Liquid water leaves the tank at 88°C at a rate of 9 kg h-1; 1 kg h-1 water vapour is lost from the system through evaporation. At steady state, what is the rate of heat input to the system? [07]
Q.3 (a) What is Reynold’s number? What is its significance? [03]
--- Content provided by FirstRanker.com ---
(b) What is difference between radial flow impeller and axial flow impeller? [04](c) What is viscosity? Explain working of Coaxial-cylinder Rotary Viscometer with diagram. [07]
OR
Q.3 (a) What is role of diffusion in bioprocessing? [03]
(b) Enlist different methods for determination of kLa. Explain any one in detail. [04]
--- Content provided by FirstRanker.com ---
(c) Explain the steps for transfer of gas from bubble to a cell with a neat diagram. [07]FirstRanker.com
Q.4 (a) What do you mean by Monod equation and explain each term in detail. [03]
(b) Derive the equation for kinetics of cell death. [04]
(c) Glucose isomerase is used extensively in the USA for production of high-fructose syrup. The reaction is: glucose ? fructose. ?H°rxn for this reaction is 5.73 kJ gmol-1; ?S°rxn is 0.0176 kJ gmol-1 K-1 [07]
--- Content provided by FirstRanker.com ---
(a) Calculate the equilibrium constants at 50°C and 75°C(b) A company aims to develop a sweeter mixture of sugars, i.e. one with a higher concentration of fructose. Considering equilibrium only, would it be more desirable to operate the reaction at 50°C or 75°C?
OR
Q.4 (a) What do you mean by theoretical and observed yields? [03]
(b) Compare the equations of Lineweaver-Burk Plot, Eadie-Hofstee Plot and Langmuir Plot. [04]
--- Content provided by FirstRanker.com ---
(c) Explain Michaelis-Menten Kinetics [07]Q.5 (a) What is difference between chemostat and turbidostat? [03]
(b) Explain kinetics of Substrate Uptake in the Absence of Product Formation. [04]
(c) Explain in detail typical batch growth curve and also relate it to specific growth rate. [07]
OR
--- Content provided by FirstRanker.com ---
Q.5 (a) Give applications of trickle bed, packed bed and fluidized bed reactors? [03]
(b) What considerations must be given for fermenter designing for inoculation and sampling control? [04]
(c) Explain the process of batch heat sterilization of liquids in detail. [07]
FirstRanker.com
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University