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Microbiology of Waste Water

Microbiology of Waste Water
Activated sludge contains large number of

all of these
bacteria
protozoa
yeasts and molds

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Microbiology of Waste Water
Which of the following is generally not referred to the sewerage system?

Solid sewers
Sanitary sewers
Combined sewers
Storm sewers

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

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

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

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Microbiology of Waste Water
Advanced treatment is generally used to treat waste water to

remove additional objectionable substances
remove coarse solids
reduce BOD
remove settleable solids

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Microbiology of Waste Water
A dense bacterial population caught in a tangled web of fibers sticking to a surface describes

coagulation
a biofilm
a biodisc
the membrane filter technique

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