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Ideal Indicator Microorganisms for Water Quality

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Ideal Indicator Microorganisms for Water Quality

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Questions and Answers

What type of bacteria is Clostridium perfringens?

Aerobic non-spore forming bacteria

Aerobic spore-forming bacteria

Anaerobic spore-forming bacteria (correct)

Anaerobic non-spore forming bacteria

What is the primary use of heterotrophic plate count in water quality assessment?

To detect only aerobic microorganisms

To detect only anaerobic microorganisms

To detect aerobic and anaerobic microorganisms (correct)

To detect viruses and protozoan cysts

What is the advantage of using Clostridium perfringens as an indicator organism?

It is only found in marine sediments

It is only found in domestic sewage

It is easy to detect and inexpensive

It is very resistant and can indicate old pollution (correct)

Why is Clostridium perfringens suggested as a suitable indicator for viruses and protozoan cysts in WTP?

Because it is a more sensitive indicator than fecal coliforms Signup and view all the answers

What is the limitation of detection methods for Clostridium perfringens?

They are relatively expensive and time-consuming Signup and view all the answers

What is the primary function of heterotrophic plate count in routine water quality monitoring?

To detect total or standard plate count of microorganisms Signup and view all the answers

What type of microorganisms does heterotrophic plate count detect?

Primarily aerobic and facultative anaerobic microorganisms Signup and view all the answers

Why is Clostridium perfringens a suitable indicator for microbiological quality of marine sediments?

Because it is very resistant and can indicate old pollution Signup and view all the answers

What is the advantage of using Clostridium perfringens over fecal coliforms?

It is more sensitive and can indicate old pollution Signup and view all the answers

What is the relationship between Clostridium perfringens and human pathogens in domestic sewage?

Clostridium perfringens is often found with human pathogens Signup and view all the answers

What is the primary purpose of using indicator organisms in water quality assessment?

To indicate the presence of human pathogens indirectly Signup and view all the answers