ENVIRONMENTAL BIOTECHNOLOGY Question Papers (Regular, 2004)

SET: 1

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

2. What is anaerobic sludge digestion ? explain the various stages of anaerobic sludge digestion.

3. Discuss the need and scope of bioremediation.

4. Explain how phytoremediation is helpful in waste water treatment.

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

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

7. “ Environment protection is the need of hour”. Justify the statement.

8. Detoxification of xenobiotics is achieved by using biological methods – what are the methods.

SET: 2

1. Compare the microbial activity process with that which occurs in a septic tank.

2. What is a septic tank? Draw and explain its working, starting its advantages and disadvantages.

3. Give the detailed methods of bio-stimulation of microbial activities.

4. Write short notes on:

a) Suspended bioreactors.

b) Composting.

5. Explain the mechanism of bioleaching and its applications.

6. What is biogas? What are its characteristics? Name and explain stages in its production along with the groups of bacteria responsible.

7. Write in detail about biotechnological advancements towards environmental safety?

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

SET: 3

1. What are the major pollutants in industrial waste water? How do you treat industrial waste water?

2. What is Imhoff tank? Draw and explain its working along with its merits and demerits.

3. Discuss the role of the following microorganisms in cleaning up polluted soils.

a) Pseudomopnas aeruginosa

b) Trichoderma viridae

4. Solid sludge treatment enhances soil fertility. Explain.

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

6. Write short notes on any two:

a) Alkaligens.

b) Indian biogas digester.

c) Fermentation system in ethanol production.

7. Industrial effluents are the cause of health hazards. What are the biological ways of controlling them.

8. Write a list of toxic compounds and the microbial species used to detoxify them and their importance.

SET: 4

1. Write short notes on the activated sludge process along with its merits and demerits.

2. What is sludge and what are its properties? How is sludge treated and disposed?

3. Explain the various methods of in situ and ex situ bioremediation, giving suitable examples.

4. What are fixed bio-film reactors? Explain how these are used in waste water treatment.

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

6. Explain the methods of producing hydrogen from bio-systems using microbes.

7. What is biological detoxification? Explain it with examples.

8. Write short notes on any two:

a) Interaction of man with environment

b) Detoxification of urea

c) Phenol – biodegradation.