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Microbiology of Waste Water

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

Storm sewers
Combined sewers
Solid sewers
Sanitary sewers

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Microbiology of Waste Water
Activated sludge contains large number of

all of these
protozoa
bacteria
yeasts and molds

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

Iron bacteria
Slime forming bacteria
All of these
Sulfur bacteria

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Microbiology of Waste Water
The biogas production process takes place at the temperature

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

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Microbiology of Waste Water
The magnitude of BOD of wastewater is related to

amount of inorganic material
bacterial count
amount of organic material
All of these

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Microbiology of Waste Water
Biogas production is

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

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