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Microbiology of Waste Water

Microbiology of Waste Water
Activated sludge contains large number of

yeasts and molds
bacteria
protozoa
all of these

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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?

Snakes
Worms
Ants
Bugs

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

Solid sewers
Combined sewers
Storm sewers
Sanitary sewers

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

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

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

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

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Microbiology of Waste Water
Biogas production is

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

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