GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019
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Subject Code:2181308 Date:09/05/2019Subject Name:Advanced Wastewater Treatment Technologies
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1 (a) Define the terms : flux, permeate and reject in context of membrane 03 systems
(b) Enlist and explain the advantages and disadvantages of a membrane bio 04 reactor.
(c) Enlist and explain the factors affecting adsorption process. 07
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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 07 description, microbiology and environmental factors.
OR
(c) A wastewater containing Co=25 mg/L of phenol is to be treated using 07 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?/s is to be treated , calculate the quantity of PAC needed per day.
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| Test | PAC Concentration added (g) | Concentration remaining mg/L | Test | PAC Concentration 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 |
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 07 bioreactor
OR
Q.3 (a) Explain the steps in production of Activated Carbon and its regeneration. 03
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(b) Enlist and explain the advantages and disadvantages of Micro filtration. 04
(c) Explain the concept of Reverse Osmosis along with its advantages and 07 disadvantages. Draw a neat sketch.
Q.4 (a) Highlight the need for removal of nutrients from wastewater. 03
(b) Explain the chemical methods for removal of phosphorus from waste 04 water.
(c) Enlist the suspended growth processes for nitrogen removal and explain 07 any three.
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Q.4 (a) Enlist the types of membrane configurations and explain any one in 3 detail.
(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 03 Activated Carbon.
(b) Write a note on Need of Advanced wastewater treatment. 04
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(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 04 chemical reactions involved.
(c) What are Advanced Oxidation Processes(AOP)? Highlight the need of 07 AOPs. Enlist the different AOPs and explain any one in detail.
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This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
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