GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
Seat No.:
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-VIII (NEW) EXAMINATION — WINTER 2018
Subject Code: 2181308
Date: 15/11/2018
Time: 02:30 PM TO 05:00 PM
Subject Name: Advanced Wastewater Treatment Technologies
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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 :(1) Permeate (i1) Reject (ii1) Flux | 03 |
| (b) Explain the principle involved in ion exchange process with neat sketch. | 04 | |
| (c) Draw a neat labeled diagram of MBR & explain the functions of following components of MBR (a) Backpulse pump (b) Membrane air scour blowers (c) Permeate pump (d) Recirculation pump | 07 | |
| OR | ||
| Q.2 | (a) Define the terms: adsorption, adsorbate and adsorbent. | 03 |
| (b) Write the applications of advanced wastewater treatment for water treatment. | 04 | |
| (c) What is hardness. Explain the zeolite process for removal of hardness. | 07 | |
| OR | ||
| Q.3 | (a) Prepare list of advantages and disadvantages’of Ultrafiltration and Reverse Osmosis. | 03 |
| (b) Write down the application of Activated carbon treatment process. | 04 | |
| (c) Explain the mechanism of adsorption with neat sketch. | 07 | |
| OR | ||
| Q.4 | (a) Explain the Langmuir and Frendluich isotherm along with assumptions. | 03 |
| (b) Give a list of photochemical process of advanced oxidation process. Explain any one. | 04 | |
| (c) Write a note-on advanced oxidation process carried out using Ozone and Hydrogen peroxide. | 07 | |
| OR | ||
| Q.4 | (a) Explain Fenton process in detail. | 03 |
| (b) Enlist the methods for chemical precipitation of phosphorous. Explain any one method with equation. | 04 | |
| (c) Explain different forms of phosphorous, along with their sources, which occur in environment. | 07 | |
| OR | ||
| Q.5 | (a) Write a note biological process for Nitrogen removal. | 04 |
| (b) Highlight and explain the advantages of Membrane bio-reactor in wastewater treatment. | 07 | |
| OR | ||
| Q.5 | (a) Enlist the sources of nitrogen in wastewater. Mention the forms in which nitrogen occur. | 03 |
| (b) Write a note on “air stripping” as chemical process for nitrogen removal from wastewater with neat sketch. | 04 | |
| (c) Differentiate between cross flow and dead end filtration process configuration. Draw figure of two different configuration of Membrane bioreactor. | 07 | |
| OR | ||
| (a) Enlist the operating parameters to be maintained during electro-coagulation and explain any one parameter. | 03 | |
| (b) Give difference between electro-coagulation and chemical coagulation. | 04 | |
| (c) The following laboratory data were collected in batch adsorption study. Plot the data according to Langmuir isotherm and determine the values of constants a and b. A volume of 500 ml is placed in each flask and wastewater has initial COD is 100 mg/L. | 07 |
| Flask No. | Mass of carbon (mg) | Final COD in mg/L |
|---|---|---|
| 1 | 960 | 3.5 |
| 2 | 740 | 52 |
| 3 | 545 | 8.0 |
| 4 | 385 | 12.5 |
| 5 | 260 | 20.5 |
| 6 | 170 | 33 |
| 7 | 0 | 100 |
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