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Microbiology of Waste Water

Microbiology of Waste Water
The magnitude of BOD of wastewater is related to

All of these
amount of inorganic material
amount of organic material
bacterial count

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Microbiology of Waste Water
Which of the following is responsible for the corrosion problem?

Iron bacteria
All of these
Slime forming bacteria
Sulfur bacteria

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Microbiology of Waste Water
Iron bacteria can produce

undesirable odors and tastes
both (a) and (b)
extreme acidity
slime

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Microbiology of Waste Water
Some cyanobacteria produce potent neurotoxins that, if ingested, will kill humans. These cyanobacteria are most likely to contaminate

water that are anoxic
water rich in phosphate wastes but poor in organic carbon
water rich in organic carbon wastes but poor in phosphate
None of these

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Microbiology of Waste Water
The death of a river by environmental pollutants ultimately results from

the overabundance of toxic proteins
the buildup of sediment on the river bottom
the overpopulation of algae
the depletion of oxygen

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Microbiology of Waste Water
The filtering medium of trickling filters is coated with microbial flora, known as

geological film
none of these
zoological film
zooglocal film

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