filter bed
Học thuậtThân thiện
Definition
Noun: A filter bed is a layer or bed of porous material, such as sand or gravel, through which a liquid (typically water) is passed to remove solid particles and impurities. It is a key component in water purification and sewage treatment systems.
Usage
A filter bed is used as a singular, countable noun. It refers to the physical structure or installation. * The water treatment plant uses a large filter bed of sand and anthracite. * Maintenance involves periodically cleaning the filter bed.
Examples
- The old filter bed needed to be replaced to improve water quality.
- Engineers designed a new filter bed with multiple layers of different media for more efficient filtration.
Advanced Usage
- In technical/engineering contexts: The term is used to describe specific designs, such as a or a , which differ in flow rate and biological activity.
- In passive constructions: Often used to describe the process, e.g., "The wastewater is treated by passing it through a filter bed."
Variants and Related Words
- Filtration bed: A less common but synonymous term.
- Filter media: Refers specifically to the material (sand, gravel, activated carbon) that fills the filter bed.
- Sand filter: A common type of filter bed using sand as the primary medium.
Synonyms
- Strainer bed
- Percolation bed
- Purification bed
Related Phrases
- To pass through a filter bed: Describes the action of filtration.
- All drinking water must pass through a filter bed before entering the distribution system.
- Layer of a filter bed: Refers to a specific stratum within the bed.
- The top layer of the filter bed catches the largest particles.
Noun
- filter consisting of a layer of sand or gravel for filtering water