ENVIRONMENTAL BIOTECHNOLOGY Question Papers (Supple, 2007 Nov, RR)

SET :1

1. Discuss the characteristics of wastewater? Explain the various biological processes
used in the treatment of wastewater. [8+8]

2. Differentiate between packed column reactor and UASB reactor. [16]

3. Write short notes on: [8+8]
(a) In-situ bioremediation.
(b) Biostimulation.

4. Write short notes on: [8+8]
(a) Landfarming
(b) Composting.

5. “Leaching offers the greatest potential of metal recovery ”Justify the statement.
[16]

6. What are Biofuels? How these are produced? Explain with examples. [3+8+5]

7. What is biological detoxification? Explain its significance with examples? [4+12]

8. Give a list of toxic wastes in environment. What are their toxic effects and what
measures are to be taken to reduce their levels? [3+5+8]


SET :2

1. What are stabilization ponds? Explain the difference between aerobic and anaerobic stabilization ponds. [4+12]

2. Discuss about anaerobic wastewater treatment. [16]

3. “Bioremediation is emerging as the most ideal alternative technology for removing environmental pollution”. Justify the statement. [16]

4. Write short notes on: [8+8]
(a) Landfarming
(b) Composting.

5. What are the advantages and disadvantages of using microbes in metal recovery? [16]

6. What are Biofuels? How these are produced? Explain with examples. [3+8+5]

7. Compare how different toxic compounds can be degraded using different strains of microbes. [16]

8. Write a detailed account on hazards caused by following chemicals and their detoxification methods. [8+8]
(a) phenols
(b) Urea
(c) Oxalates


SET :3

1. What are the major water pollutants in industrial wastewater? How do you treat industrial wastewater? [4+12]

2. Write short notes on (any two): [8+8]
(a) UASB reactor
(b) Methanogens
(c) Contact digester.

3. What is bioremediation? Explain giving suitable examples. [3+13]


4. Write short notes on: [8+8]
(a) Landfarming
(b) Composting.

5. What are the microbial strains used in bio leaching of metal extraction? Explain their mode of action? [8+8]

6. Compare the significance of using energy crops and microbes as source of energy? [16]

7. Write a detailed account on biodegradation of Xenobiotics? [16]

8. What are the biological agents used in hazardous waste management? [16]


SET :4

1. Differentiate between trickling filters and activated sludge process. [16]

2. What is anaerobic sludge digestion? Explain the various stages of anaerobic sludge digestion. [4+12]

3. Write short notes on: [8+8]
(a) Intrinsic bioremediation.
(b) Extrinsic bioremediation.

4. Write in detail about composting and the factors affecting it. [16]

5. “Leaching offers the greatest potential of metal recovery ”Justify the statement. [16]

6. Describe the applications of different biofuels? Write the scope of using them as renewable energy sources. [10+6]

7. Write a detailed account on biodegradation of Xenobiotics? [16]

8. Write short notes on any two: [8+8]
(a) Cyanide detoxination
(b) Role of Oxalates
(c) Toxic organics.