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Microbiology of Waste Water

Microbiology of Waste Water
Activated sludge contains large number of

bacteria
all of these
yeasts and molds
protozoa

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

Trickling filters
Contact aerators
Oxidation ponds
All of these

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Microbiology of Waste Water
Treatment of municipal water supplies is based upon

coagulation, filtration, chlorination
chlorination, filtration, coagulation
filtration, coagulation, chlorination
coagulation, chlorination, filtration

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Microbiology of Waste Water
Composting is one of the oldest forms of disposal of waste. It is the natural process of decomposition of organic waste that yields manure or compost. One of the following is added to the compost to get better results?

Ants
Bugs
Worms
Snakes

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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 biogas production process takes place at the temperature

all of these
lesser than 25°C
45-60°C
25-40°C

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