Download SGBAU B-Tech 6th Sem Chemical Engineering Water Technology Question Paper

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B.Tech. Sixth Semester Examination (.... Engineering)

10168 : Free Elective-II : Water Technology : 6 FECH 05

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Pages: 2 AW - 3251

Time : Three Hours Max. Marks : 80

Notes:

1. Answer three questions from Section A and three questions from Section B.
2. Due credit will be given to neatness and adequate dimensions.

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3. Assume suitable data wherever necessary.
4. Diagrams and chemical equations should be given wherever necessary.
5. Illustrate your answer with the help of neat sketches.
6. Discuss the reaction, mechanism wherever necessary.
7. Use of pen Blue/Black ink/refill only for writing the answer book.

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SECTION - A

1. a) Describe the general effluent treatment scheme with flow chart. 8
   b) Discuss the limitations of Conventional wastewater treatments. 6
   OR
2. a) How is particulate matter removed from water? Explain sand filtration. 10
   

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   b) Explain the theory of flocculation. 4
3. a) What is reverse osmosis? Explain its salient Features. 6
   b) What are the different methods of removal of iron from wastewater? Explain in brief. 7
   OR
4. Discuss about the following reactors. 13
   1. Trickling filter.

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   2. Rotating Disc fixed film biological reactor.
5. a) Why is it necessary to have nutrient control in effluents? Explain. 7
   b) What are the various physical and chemical methods for removal of nitrogen from wastewater? Explain in brief. 6
   OR

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6. Discuss the importance of activated sludge process in biological treatment of wastewater. 13

SECTION - B

1. a) What are the novel methods of aeration? 6
2. What are the different methods to remove heavy metals from wastewater? Explain in short. 7
   OR

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3. a) Explain the use and operation of rotating Geological Contactor in wastewater treatment. 7
   b) How is centrifugation carried out? Explain its applications with suitable examples. 6
4. a) What are the various desired properties of disinfectants in wastewater treatment? 4
   b) Discuss about the following points: 10
   1. Chlorination chemistry.
   2. Chlorination by products.

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   OR
5. a) How can you remove pesticides by activated carbon filters? 6
   b) Explain in detail Reverse Osmosis. 8
6. Give the details of the following filtration methods for high quality effluents. 13
   1. Gravity filters
   2. Rapid sand filters

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   3. Pressure filters
   4. Vacuum filters
   OR
7. a) How are biosolids treated? Explain in detail with a suitable example. 7
   b) Explain the phenomena of soil conditioning and fertilizing with a suitable example. 6

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