2 D 71687
16. Sand Filtration of water.
17. Activated sludge.
18. Biomognification.
19. Land fills.
20. What is infectious dust ?
21. What is HEPA filter ?
22. Define biomagnification,
(10 x 2 = 20 marks)
Part C
Write short notes on any six 07 the following.
23. Tertiary treatment methods of sewage.
24, Anacrobic sludge digestion.
25. Microbial leaching.
26. Indicator microbes.
27. Vermi composting.
28. Factors influencing growth of microbes in aquatic environment.
29. Impinger method of air sampling.
30. Water quality analysis methods.
(6 x & = 30 marks)
Part D
Answer any two questions.
31. Explain briefly on Bioremediation of xenobiotics.
82. Write an essay on Solid waste management.

33. Municipal sewage treatment system.
(2 x 12 = 24 marks)