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Code No: 2420801

IV B.Tech II Semester Regular Examinations, April/May 2009

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Time: 3 Hours Max. Marks 80

Answer any FIVE questions

All questions carry equal marks********

1. Explain in detail the global emissions from the chemical industries and their adverse

effects on the environment.

2. Write a short notes on

a) Oxygen demanding wastes.

b) Self purification of running streams

3. a) Explain the control methods and removal of Organic vapors from the gaseous

effluents.

b) Explain one of the methods for control of NOx at source level

4. a) What is sampling? Explain the need for the sampling of pollutants?

b) Write short notes on collection of gaseous air pollutants.

5. Explain in detail about packed beds and plate column for controlling air pollution.

6. What are the two commonly used systems for biological waste treatment? Explain them.

7. Explain application of the processes in waste treatment:

a) Reverse osmosis (6 m)b) Ultra filtration. (4 m)

c) Ozonation. (6 m)

8. a) Write short notes on open dumping. (8 m)

b) Write short notes on sanitary land fill. (8 m)

Set-1

7/28/2019 k 0801 April 2009

2/5

Code No: 2420801

IV B.Tech II Semester Regular Examinations, April/May 2009

/Eh^dZ/>WK>>hd/KEKEdZK>E'/EZ/E'

Time: 3 Hours Max. Marks 80

Answer any FIVE questions

All questions carry equal marks********

1. a) What are the factors that led to enactment of legislation on pollution? Discuss.

b) Elucidate the need for the Environmental legislation.

2. a) Define BOD. Determine an equation to estimate the BOD.

b) Show that the ratio of the 2- day, 350C BOD to the 5-day, 20

0C BOD is

approximately equal to one

3. Explain in brief about the treatment methods for liquid and gaseous effluents containing

nitrogenous or phosphates wastes.

4. a) Explain the methods of measurement of particulate emissions in flue gases.

b) Explain briefly the analysis of the Hydrocarbon pollutants.

5. Explain briefly:

a) Centrifugal scrubbers (8 m)

b) Packed bed & plate columns (8 m)

6. Discuss the basic theory and design aspects of an Activated sludge system.

7. Explain in detail about the flocculent settling.

8. Explain various treatment methods for nuclear waste.

*********

Set-2

7/28/2019 k 0801 April 2009

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Code No: 2420801

IV B.Tech II Semester Regular Examinations, April/May 2009

/Eh^dZ/>WK>>hd/KEKEdZK>E'/EZ/E'

Time: 3 Hours Max. Marks 80

Answer any FIVE questions

All questions carry equal marks********

1. a) What is pollution? Explain the classification of pollution.

b) Write a short note on effluent guidelines and standards

2. What are the sources of pollutants from the fertilizer and Paper and pulp industries?

Explain the characteristics of the pollutants.

3. Discuss the removal of sulfur from gases using

a) Alkalized alumina process

b) Manganese oxide process

4. Explain briefly:

a) Stack sampling

b) Sampling system

c) Particulate sampling

d) Gaseous sampling

5. a) Discuss the air pollution control methods and equipments. (12 m)

b) Explain briefly Gravitational Settling chambers. (4 m)

6. Explain about the trickling filters with a neat sketch.

7. a) What is Flotation? Differentiate Flotation and Sedimentation. (8 m)

b) Explain briefly various methods of flotation. (8 m)

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8. List the advantages and disadvantages of the following methods for solid waste

disposal:

a) Incineration (8 m)

b) Composting (8 m)

************

7/28/2019 k 0801 April 2009

5/5

Code No: 2420801

IV B.Tech II Semester Regular Examinations, April/May 2009

/Eh^dZ/>WK>>hd/KEKEdZK>E'/EZ/E'

Time: 3 Hours Max. Marks 80

Answer any FIVE questions

All questions carry equal marks********

1. a) Explain the classification of waste water sources

b) Explain the effects of air pollution in general.

2. Discuss in detail the sources and characteristics of pollutants from a petroleum

refinery.

3. What are the major sources of oxides of nitrogen and sulfur? Explain the effects

caused by SOx and describe their removal from gases.

4. a) Write a short note on Collection of Particulate pollutants.

b) Devise and explain any two devices for the sampling of particulate pollutants.

5. List and explain the chemical reactions which cause pollution in the atmosphere.

6. a) What is sludge volume index? Explain. (8 m)

b) Differentiate between Activated sludge system and trickling filters (8 m)

7. Explain the Characteristic Settling Curve in detail.

8. Discuss briefly recovery and recycling of metals

**********

Set-4