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Microbes in Aquatic Environment

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

Clostridium
Chlorobium
Escherichia
Rhodospirillum

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Microbes in Aquatic Environment
Activated sludge undergoes

any of these
Tertiary treatment
Secondary treatment
Primary treatment

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

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

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Microbes in Aquatic Environment
All of the following species are considered coliforms except

Enterobacter aerogenes
Escherichia coli
Salmonella typhi
Klebsiella pneumoniae

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Microbes in Aquatic Environment
Coliforms are used as indicator organisms because

a testing procedure with great specificity is easy to perform
both (a) and (b)
they are present wherever enteric pathogens are present
None of these

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Microbes in Aquatic Environment
Because it can be used with a variety of media and allow a resuscitation step the __________ technique has become the common and often preferred method of evaluating the microbiological characteristics of water.

MUG
membrane filtration
most probable number
Winogradsky

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