Effluent is an outflowing of water or gas from a natural body of water, or from a human-made structure.

Effluent is defined by the United States Environmental Protection Agency as “wastewater - treated or untreated - that flows out of a treatment plant, sewer, or industrial outfall. Generally refers to wastes discharged into surface waters”. The Compact Oxford English Dictionary defines effluent as “liquid waste or sewage discharged into a river or the sea”.

Effluent in the artificial sense is in general considered to be water pollution, such as the outflow from a sewage treatment facility or the wastewater discharge from industrial facilities. An effluent sump pump, for instance, pumps waste from toilets installed below a main sewage line.

In the context of waste water treatment plants, effluent that has been treated is sometimes called secondary effluent, or treated effluent. This cleaner effluent is then used to feed the bacteria in biofilters.

In the context of a thermal power station, the output of the cooling system may be referred to as the effluent cooling water, which is noticeably warmer than the environment. Effluent only refers to liquid discharge.

In sugar beet processing, effluent is often settled in water tanks that allow the mud-contaminated water to settle. The mud sinks to the bottom, leaving the top section of water clear, free to be pumped back into the river or be reused in the process again.

The Mississippi River's effluent of fresh water is so massive (7,000 to 20,000 m³/sec, or 200,000 to 700,000 ft³/sec) that a plume of fresh water is detectable by the naked eye from space, even as it rounds Florida and up to the coast of Georgia.

Other articles related to "effluent":

Effluent Spreading
... Effluent spreading is a process in which a slurry of effluent from a dairy farm's milking parlor is pumped and spread on pasture ... In New Zealand the application of effluent is a permitted activity, although spreading in excess is an environmental hazard ...
Dirty Dairying - Prosecutions
2012 at least 151 prosecutions involving 300 charges were made for unlawful discharges of dairy effluent ... the Resource Management Act for unauthorised effluent discharges ... to the Crafars and their sharemilker in 2010 for allowing effluent to enter a waterway near the town of Bulls ...
Sewage Treatment Plants - Treatment in The Receiving Environment - Effects On Biology
... on nutrients can have large effects on the biological life in the water in contact with the effluent ... bodies of water usually 1–2 meters in depth that receive effluent from sedimentation tanks or other forms of primary treatment ... Dominated by algae Polishing ponds are similar to oxidation ponds but receive effluent from an oxidation pond or from a plant with an extended mechanical treatment ...
Arcata Wastewater Treatment Plant And Wildlife Sanctuary - Conventional Pollutants or Wetland Detritus
... Individuals who value wetland environments may not realize the effluent characteristics necessary for release of treated wastewater to Humboldt Bay ... because of an absence of significant research on wildlife exposure to partially treated effluent and to potential accumulation of chemicals being removed from effluent in wetland treatment processes ... onto the large surface area of treatment ponds and marshes increases the volume of effluent discharged from the wetland treatment system to as much ...

Famous quotes containing the word effluent:

    Unfortunately, our affluent society has also been an effluent society.
    Hubert H. Humphrey (1911–1978)