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2 D 31621

Part B
Answer all ten questions in one or two sentences.
Infectious dust.
Rotorod sampler.
Single dwelling water supplies.
Airborne fungal infectiopns.
Algal bloom.
COD.
Indicator organisms.
Anaerobic digester.
Methanogenesis.
Nitroaromatic compounds,
(10 x 2 = 20 marks)
Part C
Answer briefly any six questions.

Briefly discuss the major organisms present in the air.
Elaborate the major harmful microorganisms and air-borne infections.

Investigate the major factors influencing the growth and distribution of microorganisms in aquatic
ecosystems.

Elucidate the major steps involved in the purification of municipal water.
Discuss the principles, methodology and applications of vermi-composting.
Illustrate the production of biogas.
Examine the mechanisms of the biodegradation of PCBs.
Discuss the major step involved in the microbial leaching with appropriate examples.
(6 x 5 = 380 marks)
Part D
Answer any two questions in details.
Investigate the methods and devices used for the microbiological quality of air.
Elaborate the major steps involved in the treatment of waste water.
Discuss the major types of waterborne diseases and their transmission.

(2 x 12 = 24 marks)

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