Advertisement

Advertisement

filter bed

noun

  1. a pond or tank having a false bottom covered with sand and serving to filter river or pond waters.


filter bed

noun

  1. a layer of sand or gravel in a tank or reservoir through which a liquid is passed so as to purify it Compare bacteria bed
  2. any layer of material through which a liquid is passed so as to filter it
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Discover More

Word History and Origins

Origin of filter bed1

First recorded in 1870–75
Discover More

Example Sentences

Chlorination, by decreasing the load on filter beds, has enabled the rate of filtration to be increased in some cases.

A series of thirty filter beds is included in the original scheme; and the water travels 73.3 m. from the source to Birmingham by gravity alone with a fall of about 170 ft.

A good filter bed should not pass more than from two to three gallons per hour for every square foot of surface, and it must therefore have a large area.

Intermittent Filtration.—Sewage may be purified mechanically and chemically by method of intermittent filtration by passing it through filter beds of gravel, sand, coke, cinders, or any such materials.

The city's filtration system is of special interest to engineers; it occupies 20 acres, has eight filter beds, and filters 15,000,000 gallons of water daily.

Advertisement

Advertisement

Advertisement

Advertisement


filterable virusfilter bubble