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Microbes in Aquatic Environment

Microbes in Aquatic Environment
Activated sludge undergoes

any of these
Primary treatment
Tertiary treatment
Secondary treatment

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Microbes in Aquatic Environment
Members of all of the following genera of bacteria typically are found in a maturing Winogradsky column except

Escherichia
Clostridium
Chlorobium
Rhodospirillum

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Microbes in Aquatic Environment
Chemical precipitation of phosphorus is

both (a) and (b)
secondary treatment
tertiary treatment
primary treatment

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Microbes in Aquatic Environment
Loss of carbon through the microbial loop in oligotrophic environments is __________ to/than the loss of carbon through the microbial loop in copiotrophic environments.

approximately equal
half
greater
lesser

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Microbes in Aquatic Environment
The Redfield ratio is an index of concentration of

carbon, hydrogen and oxygen
carbon, phosphorous and sulfur
nitrogen, potassium and iron
carbon, nitrogen and phosphorous

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Microbes in Aquatic Environment
Removal of solids is generally considered as a

Secondary treatment
Primary treatment
Tertiary treatment
None of these

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