Intermittent sand filter definition

Intermittent sand filter means a bed of granular materials 24 to 36 inches deep underlain by graded gravel and collecting tile. Wastewater is applied intermittently to the surface of the bed through distribution pipes, and the bed is underdrained to collect and discharge the final effluent. Uniform distribution is normally obtained by dosing so as to utilize the entire surface of the bed. Filters may be designed to provide free access (open filters) or may be buried in the ground (buried filters or subsurface sand filters).
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Intermittent sand filter means a conventional sand filter.
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Intermittent sand filter means a packed-bed filter of medium-grained sand used to treat septic tank effluent to an advanced level. Wastewater is dosed to the surface of the sand through a pressure-distribution network and allowed to percolate through the sand where BOD is reduced and suspended solids are removed; treatment is accomplished by physical filtration as well as microbial growth on the surface of the sand grains. After a single pass, the effluent is collected in an underdrain system for further processing or dispersal.
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Examples of Intermittent sand filter in a sentence

  • Intermittent sand filter fecal coliform removal is a function of hydraulic load- ing; removals decrease as the loading rate increases above 1 gpm/ft2 (Emerick et al., 1997).

  • Intermittent sand filter systems allow for a fifty percent (50%) reduction in the size of the drainfield for final disposal of wastewater.

  • Intermittent sand filter cross section and sand specification (UFC 4-214-03, 2004).

  • Eichler HG, Pignatti F, Schwarzer-Daum B, Hidalgo-Simon A, Eichler I, et al.

  • Connections to existing municipal or County Water/Sewer Districts public systems Standard absorption trench systems Sand-lined absorption trench systems Gravelless absorption trench systems At-grade absorption trench systems Pressure distribution systems Sand mound systems Intermittent sand filter systems Level II Systems Wastewater systems less than 2,500 gpd that are not required to be designed by a professional engineer.

  • Intermittent sand filter designs may delete soil cover and incorporate three to six inches (3-6") of a quality cypress or cedar mulch over the entire filter area.


More Definitions of Intermittent sand filter

Intermittent sand filter means a bed of granular materials 24-to 36- inches deep underlain by graded gravel and collecting tile. Wastewater is applied intermittently to the surface of the bed through distribution pipes, and the bed is underdrained to collect and discharge the final effluent.
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Related to Intermittent sand filter

  • Slow sand filtration means a process involving passage of raw water through a bed of sand at low velocity (generally less than 0.4 meters per hour (m/h)) resulting in substantial particulate removal by physical and biological mechanisms.

  • HEPA filter means a high efficiency particulate absolute air filter capable of trapping and retaining 99.97 percent of fibers greater than 0.3 micrometers in mass median aerodynamic diameter equivalent.

  • Intermittent Resource means a Generation Capacity Resource with output that can vary as a function of its energy source, such as wind, solar, run of river hydroelectric power and other renewable resources. Internal Market Buyer:

  • Intermittent stream means a well-defined channel that contains water for only part of the year, typically during winter and spring when the aquatic bed is below the water table. The flow may be heavily supplemented by stormwater runoff. An intermittent stream often lacks the biological and hydrological characteristics commonly associated with the continuous conveyance of water.

  • Conventional filtration treatment means a series of processes including coagulation, flocculation, sedimentation, and filtration resulting in substantial particulate removal.

  • Clinical nurse specialist means a registered nurse with relevant post-basic qualifications and 12 months’ experience working in the clinical area of his/her specified post-basic qualification, or a minimum of four years’ post-basic registration experience, including three years’ experience in the relevant specialist field and who satisfies the local criteria.

  • In Patient Care means treatment for which the insured person has to stay in a hospital for more than 24 hours for a covered event.

  • Intermittent Leave means leave taken in separate blocks of time due to a single qualifying reason.

  • Waterborne disease outbreak means the significant occurrence of an acute infectious illness, epidemiologically associated with the ingestion of water from a public water system which is deficient in treatment, as determined by the Division.

  • HIV means human immunodeficiency virus.

  • Solid film lubricant means a very thin coating consisting of a binder system containing as its chief pigment material one or more of molybdenum disulfide, graphite, polytetrafluoroethylene (PTFE) or other solids that act as a dry lubricant between faying surfaces.