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Microbes in Aquatic Environment

Microbes in Aquatic Environment
Trickling filter comes under

tertiary treatment
primary treatment
secondary treatment
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.

Winogradsky
membrane filtration
most probable number
MUG

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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
they are present wherever enteric pathogens are present
both (a) and (b)
None of these

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Microbes in Aquatic Environment
Activated sludge undergoes

any of these
Secondary treatment
Primary treatment
Tertiary treatment

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

Enterobacter aerogenes
Klebsiella pneumoniae
Salmonella typhi
Escherichia coli

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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

Chlorobium
Escherichia
Rhodospirillum
Clostridium

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