Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2161304 Biological Processes For Wastewater Treatment Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2161304 Date:14/05/2019
Subject Name:Biological Processes for Wastewater Treatment
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) State the objectives of Biological Waste-Water Treatment. 03
(b) Differentiate between: Aerobic & Anaerobic treatment process for
wastewater treatment
04
(c) Draw the BOD progression curve and explain the different phases of it. 07
Q.2 (a) Differentiate between BOD, COD & TOC. 03
(b) Define: (1) Specific growth rate (2) Yield coefficient (3) Endogenous
decay coefficient (4) Maximum substrate utilization rate constant
04
(c) Enlist and explain the factors affecting the BOD test. 07
OR
(c) Write down the mass balance for CFSTR with recycle and hence Derive
the equation for finding biokinetic constant.
07
Q.3 (a) Write a brief note on ?bulking of sludge in ASP?. 03
(b) Explain the mechanism by which substrate removal takes place in
suspended growth process.
04
(c) Highlight the importance of BOD for environmental engineers 07
OR
Q.3 (a) Describe with sketches the treatment of waste water by activated sludge
process. Mention the advantages and disadvantages of this system.
03
(b) Give the brief classification of various Biological treatment processes
used for Wastewater Treatment.
04
(c) Enlist and explain the advantages and disadvantages of anaerobic
treatment processes.
07
Q.4 (a) Differentiate between the Oxidation Ditch & oxidation Ponds. 03
(b) Explain in detail anaerobic sludge digestion. 04
(c) Enlist and explain the basic steps involved in the overall anaerobic
oxidation of a waste.
07
OR
Q.4 (a) Write a short note: Bio-towers. 03
(b) Discuss the mechanism of working of UASB with neat sketch. 04
(c) Enlist the factors affecting the performance of aerators and describe
anyone in brief.
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2161304 Date:14/05/2019
Subject Name:Biological Processes for Wastewater Treatment
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) State the objectives of Biological Waste-Water Treatment. 03
(b) Differentiate between: Aerobic & Anaerobic treatment process for
wastewater treatment
04
(c) Draw the BOD progression curve and explain the different phases of it. 07
Q.2 (a) Differentiate between BOD, COD & TOC. 03
(b) Define: (1) Specific growth rate (2) Yield coefficient (3) Endogenous
decay coefficient (4) Maximum substrate utilization rate constant
04
(c) Enlist and explain the factors affecting the BOD test. 07
OR
(c) Write down the mass balance for CFSTR with recycle and hence Derive
the equation for finding biokinetic constant.
07
Q.3 (a) Write a brief note on ?bulking of sludge in ASP?. 03
(b) Explain the mechanism by which substrate removal takes place in
suspended growth process.
04
(c) Highlight the importance of BOD for environmental engineers 07
OR
Q.3 (a) Describe with sketches the treatment of waste water by activated sludge
process. Mention the advantages and disadvantages of this system.
03
(b) Give the brief classification of various Biological treatment processes
used for Wastewater Treatment.
04
(c) Enlist and explain the advantages and disadvantages of anaerobic
treatment processes.
07
Q.4 (a) Differentiate between the Oxidation Ditch & oxidation Ponds. 03
(b) Explain in detail anaerobic sludge digestion. 04
(c) Enlist and explain the basic steps involved in the overall anaerobic
oxidation of a waste.
07
OR
Q.4 (a) Write a short note: Bio-towers. 03
(b) Discuss the mechanism of working of UASB with neat sketch. 04
(c) Enlist the factors affecting the performance of aerators and describe
anyone in brief.
07
2
*************
Q.5 (a) Explain the types of aerators. 03
(b) Enlist the major problems faced by small communities to treat the
domestic wastewater
04
(c) Discuss the fundamental considerations in the application of natural
treatment systems.
07
OR
Q.5 (a) Enlist the different types of natural treatment systems used for small
community.
03
(b) Write a brief note: Root zone treatment 04
(c) Write a detailed note on: packaged treatment plants 07
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This post was last modified on 20 February 2020