Chapter 10 - Filtration Fundamentals

Question 1

The water treatment process involving the removal of suspended matter by passing water through a porous medium, such as sand.

Answer 1

Filtration

Question 2

Granular material through which material is collected and stored when water passes through it.

Answer 2

Filter Media

Question 3

A filtration process that involves passing raw water through a bed of sand at low velocity, resulting in particulate removal by physical and biological mechanisms.

Answer 3

Slow Sand Filtration

Question 3

A filtration method that includes coagulation, flocculation, and filtration, but excludes sedimentation.
Only applicable to raw water relatively low in turbidity because all suspended material must be trapped by the filters.

Answer 3

Direct Filtration

Question 4

A pressure filter using a medium made from diatoms.
The water is forced through the medium by pumping.

Answer 4

Diatomaceous Earth Filter

Question 5

A small, prefabricated unit that has been designed and assembled at a factory and then shipped to the installation site.

Answer 5

Package Treatment Plant

Question 6

The layer of solids and biological growth that forms on top of a slow sand filter, allowing the filter to remove turbidity effectively without chemical coagulation.

Answer 6

Schmutzdecke