Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem New 2181308 Advanced Wastewater Treatment Technologies Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2181308 Date:09/05/2019
Subject Name:Advanced Wastewater Treatment Technologies
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.
Q.1 (a) Define the terms : flux, permeate and reject in context of membrane
systems
03
(b) Enlist and explain the advantages and disadvantages of a membrane bio
reactor.
04
(c) Enlist and explain the factors affecting adsorption process. 07
Q.2 (a) Differentiate between physical adsorption and chemical adsorption 03
(b) Differentiate between Nitrification and denitrification 04
(c) Explain Biological Nitrification process including its process
description, microbiology and environmental factors.
07
OR
(c) A wastewater containing Co=25 mg/L of phenol is to be treated using
PAC to produce effluent concentration Ce=0.1 mg/L The constants for
Langmuir isotherm are to be determined using results given below. The
volume of waste in each beaker is 1 L. If the flow rate of 0.11m
3
/s is to
be treated , calculate the quantity of PAC needed per day.
Test PAC
added
(g)
Concentration
remaining
mg/L
Test PAC
added (g)
Concentration
remaining
mg/L
1 0.25 6.0 5 1.5 0.06
2 0.32 1.0 6 2.0 0.06
3 0.5 0.25 7 2.6 0.06
4 1.0 0.09
07
Q.3 (a) Differentiate between external MBR and immersed MBR. 03
(b) Explain the terms: Trans Membrane Pressure, Membrane Fouling. 04
(c) With the help of a neat sketch explain the components of a membrane
bioreactor
07
OR
Q.3 (a) Explain the steps in production of Activated Carbon and its regeneration. 03
(b) Enlist and explain the advantages and disadvantages of Micro filtration. 04
(c) Explain the concept of Reverse Osmosis along with its advantages and
disadvantages. Draw a neat sketch.
07
Q.4 (a) Highlight the need for removal of nutrients from wastewater. 03
(b) Explain the chemical methods for removal of phosphorus from waste
water.
04
(c) Enlist the suspended growth processes for nitrogen removal and explain
any three.
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2181308 Date:09/05/2019
Subject Name:Advanced Wastewater Treatment Technologies
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.
Q.1 (a) Define the terms : flux, permeate and reject in context of membrane
systems
03
(b) Enlist and explain the advantages and disadvantages of a membrane bio
reactor.
04
(c) Enlist and explain the factors affecting adsorption process. 07
Q.2 (a) Differentiate between physical adsorption and chemical adsorption 03
(b) Differentiate between Nitrification and denitrification 04
(c) Explain Biological Nitrification process including its process
description, microbiology and environmental factors.
07
OR
(c) A wastewater containing Co=25 mg/L of phenol is to be treated using
PAC to produce effluent concentration Ce=0.1 mg/L The constants for
Langmuir isotherm are to be determined using results given below. The
volume of waste in each beaker is 1 L. If the flow rate of 0.11m
3
/s is to
be treated , calculate the quantity of PAC needed per day.
Test PAC
added
(g)
Concentration
remaining
mg/L
Test PAC
added (g)
Concentration
remaining
mg/L
1 0.25 6.0 5 1.5 0.06
2 0.32 1.0 6 2.0 0.06
3 0.5 0.25 7 2.6 0.06
4 1.0 0.09
07
Q.3 (a) Differentiate between external MBR and immersed MBR. 03
(b) Explain the terms: Trans Membrane Pressure, Membrane Fouling. 04
(c) With the help of a neat sketch explain the components of a membrane
bioreactor
07
OR
Q.3 (a) Explain the steps in production of Activated Carbon and its regeneration. 03
(b) Enlist and explain the advantages and disadvantages of Micro filtration. 04
(c) Explain the concept of Reverse Osmosis along with its advantages and
disadvantages. Draw a neat sketch.
07
Q.4 (a) Highlight the need for removal of nutrients from wastewater. 03
(b) Explain the chemical methods for removal of phosphorus from waste
water.
04
(c) Enlist the suspended growth processes for nitrogen removal and explain
any three.
07
2
OR
Q.4 (a) Enlist the types of membrane configurations and explain any one in
detail.
03
(b) Enlist and explain the factors affecting electro coagulation process. 04
(c) Write a short note on Electro dialysis along with a neat sketch. 07
Q.5 (a) Differentiate between Powdered Activated Carbon and Granular
Activated Carbon.
03
(b) Write a note on Need of Advanced wastewater treatment. 04
(c) Explain adsorption isotherms along with assumptions for each isotherm. 07
OR
Q.5 (a) Differentiate between chemical coagulation and electrocoagulation. 03
(b) Explain the basic mechanism of cation and anion exchangers along with
chemical reactions involved.
04
(c) What are Advanced Oxidation Processes(AOP)? Highlight the need of
AOPs. Enlist the different AOPs and explain any one in detail.
07
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This post was last modified on 20 February 2020