filter bed
- noun
- Specialized
:
cama de filtración
- The filters require regular maintenance because, over time, the filter bed accumulates a layer of sediment that will reduce its infiltration capacity.
Examples
-
Contaminants are trapped within the filter bed.
Academic text (1998) -
(BRI recommends that the filter bed be replaced every three years.)
Academic text (1995) -
The presence of high oxygen content in the filter bed is necessary for bacteria to remove sewage pollutants.
Academic text (2009) -
This process eliminates the possibility of a single filter bed breakthrough that could be masked by the operation of the remaining tanks.
Academic text (1998) -
The effluent valve must meter these rates carefully because as the filter bed becomes dirty and clogged with solids, the resistance to flow rises.
Academic text (2003) -
In both types, stormwater passes through a sediment trapping inlet bay before flowing into the compost filter bed.
Academic text (1995) -
Most of this polymer and its attracted impurities remain on or near the filter bed surface, creating the increased pressure differential that triggers filter tank backwash.
Academic text (1998) -
This serves to create a pin-point floc on the filter beds that attracts and holds minute particles, including Giardia cysts and viruses.
Academic text (1998) -
The water flows through the filter bed to remove impurities before reaching the clean water tank.
-
To ensure effective water treatment, the filter bed must be regularly maintained and cleaned.
Synonyms
5
2.2
A device that removes dirt, germs, and bad chemicals from water
A layer of sand or gravel in a sewage plant where tiny living things break down waste
An area of soil that soaks up and cleans water from a septic tank
A tank or device where solids settle out of water to make it clear
How Effective
- Specialized
1
4.1
- Specialized
Surface Forms
Morphology
The noun is transparently compositional: 'filter' (a device/material that removes impurities) + 'bed' (a layer or base) directly yields the sense of a layer used for filtering. This compound follows a common English noun-noun pattern (and similar constructions exist in other languages), so a B1 learner who knows both constituents can readily infer the meaning.
Etymology
Filter bed comes from a simple image: a bed of sand or gravel that acts as a filter, trapping dirt as water moves through it. That's why filter bed means 'a layer of sand or gravel used to filter water'.