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filter bed

noun
1.
a pond or tank having a false bottom covered with sand and serving to filter river or pond waters.
Origin
1870-1875
1870-75
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for filter bed
  • Do not allow the septic tank to fill with solids to the point that they flow over into the rock-plant filter bed.
  • In placing the anthracite in the filters, extreme care shall be taken to avoid disturbing the gravel filter bed.
  • Dry water quality swale: consists of an open channel with a filter bed of permeable soils overlaying an underdrain system.
  • Wastewater is distributed over the top of the filter bed through which wastewater is trickled.
  • The surface of the filter bed should be level to ensure equal distribution of flow in the bed.
  • The former filter bed area is higher than the wetlands to the north.
  • The filter bed was prepared as it would be for an actual burn.
  • The microorganism utilize the oxygen on the nitrate and leaves nitrogen gas bubbles in the filter bed.
  • As the water moves through the media, larger impurities are removed in the upper layer of the filter bed.
  • Note the characteristics of the effluent coming out of the manifold this may indicate that the filter bed may need servicing.
British Dictionary definitions for filter bed

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
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9
10
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