ENVIRONMENTAL BIOTECHNOLOGY Question Papers (Regular, 2006)

SET: 1

1. Differentiate between trickling filters and activated sludge process.

2. Distinguish between aerobic & anaerobic waste water treatment.

3. Write short notes on:

a) In situ bioremediation.

b) Bio-stimulation

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

7. Write a detailed account on biodegradation of xenobiotics?

8. Detoxification of xenobiotics is achieve by using biological methods? What are the methods.

SET: 2

1. Write short notes on any two:

a) Operational problems in trickling filters and their remedies.

b) Biochemical oxygen demand.

c) Acidity and Alkalinity

2. Write short notes on(any two):

a) Primary treatment of waste water .

b) Secondary treatment of waste water.

c) Tertiary treatment of waste water.

3. “Bioremediation is emerging as the most ideal alternative technology for removing environmental pollution”. Justify the statement.

4. Write short notes on:

a) Soil piles

b) Prepared beds

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

6. Write short notes on any two:

a) Natural gas

b) Solar energy

c) Biogas

7. Write a detailed account on biodegradation of xenobiotics?

8. What is the importance of Pseudomonas putida in hazardous waste control?

SET: 3

1. What are stabilization ponds? Explain the difference between aerobic and anaerobic stabilization ponds.

2. Explain the following:

a) Sludge drying and sludge conditioning.

b) Sludge lagooning

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

4. Write short notes on:

a) Land farming

b) Composting

5. What is microbial transformation of metals? Enumerate and describe the importance of micro organisms involved in it.

6. Write short notes on any two:

d) Natural gas

e) Solar energy

f) Biogas

7. Explain the importance of controlling pollutants? What are the advantages of using bio-systems in this process?

8. Explain the various biotechnological approaches of hazardous waste management?

SET: 4

1. What are stabilization ponds? Explain the difference between aerobic and anaerobic stabilization ponds.

2. Write short notes on :

a) Sloughing of filter

b) Sludge thickening and drying

c) Under drainage system of filters.

3. How is bioremediation useful in clean up of oil spills?

4. Write short notes on:

a) Land farming

b) Composting

5. What are the microbial strains used in bioleaching of metal extraction? Explain their mode of action?

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

7. Compare how different toxic compounds can be degraded using different strains of microbes.

8. Write various examples of biotechnological applications of waste management?