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Microbiology of Waste Water

Microbiology of Waste Water
Which of the following is not employed as an oxidation method?

All of these
Contact aerators
Oxidation ponds
Trickling filters

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

zooglocal film
none of these
geological film
zoological film

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Microbiology of Waste Water
Biogas production is

None of these
an oxygen dependent process
a temperature-dependent process
a temperature independent process

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Microbiology of Waste Water
Iron bacteria can produce

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

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Microbiology of Waste Water
Activated sludge contains large number of

bacteria
yeasts and molds
all of these
protozoa

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

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