Exam 43: Applied Environmental Microbiology

Fecal coliforms are useful indicator organisms for the contamination of water by _________.

Purification of waters while generating power and providing energy for monitoring environmental processes is an application of microbial fuel cells.

Fecal enterococci are increasingly being used as an indicator of fecal contamination in brackish and marine water because they die at a faster rate than fecal coliforms thus providing a more reliable indicator of pollution.

All coliforms can grow at 44.5 ^$\circ$ C.

Canada geese have become a major source of Giardia and Cryptosporidium contamination of soil and fresh water.

Primary treatment of sewage involves the use of which type of process?

Which of the following contributes to the removal of organic material in home sewage treatment system leach fields?

Sewage treatment that involves horizontal flow in an agitated aeration tank is referred to as

Secondary treatment of sewage involves the use of which type of process?

The enhancement of the degradation of recalcitrant compounds by the addition of an easily metabolized carbon source such as glucose is called ________.

Filamentous organisms such as Sphaerotilus and Thiothrix can lower the efficiency of activated sludge processes by causing _________.

Chlorination alone will usually suffice to inactivate viruses present in drinking water.

Molecular techniques using 16S rRNA gene targeted primers are now used routinely to detect coliforms in water.

A septic tank will function effectively without a leach field.

What is the target threshold to meet EPA maximum containment level goals?

Cryptosporidium is an important waterborne disease.This organism is a _________.

The biochemical oxygen demand (BOD)test is primarily a measure of carbon demand and should not include nitrogen oxidation demand.

Activated sludge is used in which sewage treatment step?

Rapid sand filtration,used in many water purification plants,is sufficient to ensure that Giardia will be consistently removed.

The solubilization of metals from low-grade ores by microorganisms is called __________. or