Exam 43: Applied Environmental Microbiology

Coliforms and fecal coliform are often differentiated based on their responses to

Methods used to remove or destroy viruses from drinking water include

Cryptosporidium has recently become of concern because it is hard to remove from water supplies.

Indicator organisms are added to drinking water to test whether the purification process is being carried out effectively.

If a leach field floods it becomes anoxic and effective treatment ceases.

A septic tank will function effectively without a leach field.

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

In the testing of water for coliforms,the presumptive test involves detection of

The acceleration of microbiological processes by the addition of known active microorganisms to soils,waters,or other complex systems is called __________.

The membrane filter technique can be used in all waters and has completely replaced the MPN technique.

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

The inability of the "superbug" to successfully clean up oil spills in the ocean environment was mostly a matter of its inability to survive and compete in that environment.

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

Activated sludge is used in which sewage treatment step?

Additions of a remediating microbe to natural environments can be more successful if

It is usually beneficial to add nitrogen when one attempts to stimulate hydrocarbon degradation in the ocean.

Potable water

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

Potable water is unfit for consumption or recreation because of the high levels of microbial contaminants present.

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