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Microbes in Aquatic Environment

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

Secondary treatment
Primary treatment
None of these
Tertiary 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

Clostridium
Escherichia
Chlorobium
Rhodospirillum

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

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

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Microbes in Aquatic Environment
Chemical precipitation of phosphorus is

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

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Microbes in Aquatic Environment
Trickling filter comes under

secondary treatment
none of these
tertiary treatment
primary treatment

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Microbes in Aquatic Environment
Metabolism of dissolved organic material released by phytoplankton allows heterotrophic bacteria to become part of the particulate organic matter that is passed up the food web to be metabolized and released as mineral elements and CO2 at each transfer. This sentence describes the

Gibbs free energy
Redfield ratio
Winogradsky column
microbial loop

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