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Microbiology of Waste Water

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

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

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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
Worms
Bugs
Snakes

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Microbiology of Waste Water
The death of a river by environmental pollutants ultimately results from

the overpopulation of algae
the overabundance of toxic proteins
the buildup of sediment on the river bottom
the depletion of oxygen

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Microbiology of Waste Water
Iron bacteria can produce

both (a) and (b)
slime
undesirable odors and tastes
extreme acidity

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Microbiology of Waste Water
Activated sludge contains large number of

yeasts and molds
all of these
bacteria
protozoa

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Microbiology of Waste Water
Oxidation ponds are shallow ponds, generally designed at the depth of

5 to 8 feet
2 to 40 feet
1 to 3 feet
4 to 6 feet

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