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Microbiology of Waste Water

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

Combined sewers
Sanitary sewers
Storm sewers
Solid sewers

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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
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?

Bugs
Snakes
Ants
Worms

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

Sulfur bacteria
Slime forming bacteria
All of these
Iron bacteria

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Microbiology of Waste Water
Which is not a form of biomass energy?

Ethanol and methanol production for auto fuel
Photovoltaic production of hydrogen
Composting to produce methane
Incineration of solid waste

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

a biodisc
a biofilm
the membrane filter technique
coagulation

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