ENVIRONMENTAL BIOTECHNOLOGY Question Papers (Supplementary, 2005)

SET: 1

1. Differentiate between trickling filters and activated sludge process.

2. Explain the following:

a) Sludge drying and sludge conditioning.

b) Sludge lagooning

3. Write a note on bioremediation and discuss its constraints and priorities.

4. Write short notes on:

a) Land farming

b) Composting

5. Write notes on:

a) Direct leaching

b) Indirect leaching

c) Microbes in mining

6. Write short notes on any two:

a) Algal fuel

b) Oil industry in India

c) Gasohol programme

7. Write short notes on any two:

a) Mixed microbial degradation

b) Cam plasmid

c) Biodegradation of halogenated compounds.

8. Write different types of xenobiotic compounds, their toxic effects caused in the ecosystem? Explain their biodegradation.

SET: 2

1. Discuss the characteristics of waste water? Explain the various biological processes used in the treatment of waste water.

2. Write short notes on (any two):

a) Sludge digestion

b) Sludge thickening

c) Septic tank

3. What is bioremediation? Differentiate between intrinsic and engineered bioremediation.

4. Write in detail about composting and the factors affecting it.

5. “ Leaching offers the greatest potential of metal recovery”. Justify the statement.

6. Explain how microbes are useful in recovery of oil from oil wells.

7. Write a detailed account on biodegradation of xanobiotics?

8. Write different types of xenobiotic compounds, their toxic effects caused in the ecosystem? Explain their biodegradation.

SET: 3

1. Discuss the characteristics of waste water? Explain the various biological processes used in the treatment of waste water

2. Explain the following:

a) Sludge drying and sludge conditioning.

b) Sludge lagooning

3. What is bioremediation? Differentiate between intrinsic and engineered bioremediation.

4. Write short notes on:

c) Land farming

d) Composting

5. What are the advantages and disadvantages of using microbes in metal recovery?

6. What are bio-fuels? How these are produced? Explain with examples.

7. What is biological detoxification? Explain its significance with examples?

8. What are the biological agents used in hazardous waste management?

SET: 4

1. Differentiate between trickling filters and activated sludge process.

2. Write short notes on :

a) Sloughing of filter

b) Sludge thickening and drying

c) Under drainage system of filters

3. Write a short notes on bioremediation of polluted sites?

4. Write short notes on:

a) Microbial methods of soil improvement.

b) Bio-fertilizer.

5. “ Leaching offers the greatest potential of metal recovery”. Justify the statement.

6. What are bio-fuels? How are these produced? Explain with examples.

7. Write short notes on any two:

a) Industrial effluents.

b) Mercury toxin

c) Detoxifying microbes
Explain the various biotechnological approaches of hazardous waste management.