LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & PLANT BIO-TECH.
SIXTH SEMESTER – APRIL 2012
PB 6610/PB 6605 – ENVIRONMENTAL BIOTECHNOLOGY
Date : 18-04-2012 Dept. No. Max. : 100 Marks
Time : 1:00 – 4:00
PART-A
Answer the following, each within 50 words only: (10X2=20 Marks)
- What is Biogas?
- What is silage?
- Define Biosorption.
- What are Lagoons?
- What are Xenobiotics?
- Write the uses of Lowshear air lift reactor?
- Explain Bioventing.
- Define biomineralization.
- Define Biofilm.
- What are radionuclides?
PART-B
Answer the following within 500 words each:
Draw diagrams wherever necessary: (5X7=35 marks)
- a) Give an account on Hydrogen Production.
(OR)
- b) Write briefly about non-conventional energy resources.
- a) Describe in detail about the working of trickling filter in sewage treatment.
(OR)
- b) Explain Anaerobic digestion of sewage.
- a) Explain the degradation pathway of any one xenobiotics.
(OR)
- b) Discuss the Soil pollution by Xenobiotics.
- a) Explain briefly about the process of Phytoremediation.
(OR)
- b) Describe the design of Plug flow reactor.
- a) Explain the methods employed in microbial leaching.
(OR)
- b) Give an account on biocorrosion.
PART-C
Answer any THREE of the following, each with 1200 words:
Draw diagrams wherever necessary: (3X15=45 marks)
- Give a detailed account on Recycling of solid waste products.
- Describe in detail about the treatment of oil spills.
- Discuss the methods to purify polluted air.
- Describe in detail about the bioremediation strategies.
- Explain in detail about the methods to uptake radionuclides from polluted sites.
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