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THIRD SEMESTER B.A/B.Sc. DEGREE EXAMINATION, NOVEMBER 201:

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(CUCBCSS—UG)

Microbiology

MBG 38 03—ENVIRONMENTAL AND SANITATION MICROBIOLOGY

(2018 Admissions)

: Three Hours _
Part A

Answer all guestions.

Name any incthod of secondary treatment of sewage,

The amount of oxygea used for organic compound degradation by microbes is called --—--_—-.

The COD is measured in which unit ?

The type of filter used in laminar air flow chamber is called

The nitrates in the sewage are removed in which stage of treatment ?

Rotorod sampler is used for ~

The primary treatment of sewa ge is purely a 100653,
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Name any method for water quality analysis.

Gravity slide method is used for -
Name any one pathogen causing water borne infection.
Name any one harmful bacteria in air.

Expand PCB.

Part B
Answer all questions in one or two sentences.
BOD.
Chlorination.

Methanogens.

Maximum : 80 Marl:s

(12 x 4% = 6 marks)

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