Decantation


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decantation

[′dē‚kan′tā·shən]
(engineering)
A method for mechanical dewatering of a wet solid by pouring off the liquid without disturbing underlying sediment or precipitate.

Decantation

 

the pouring off of liquid from underlying sediment. Decantation is a laboratory and technical method of washing amorphous precipitates, making possible a more complete removal of mother liquor than does washing the precipitate through a filter. It is also used to extract soluble substances from powdered solid raw material (for example, for removing the sugar solution after treating sugar beet cossettes with hot water).

REFERENCES

Voskresenskii, P. I. Tekhnika laboratornykh rabot, 9th ed. Moscow, 1969.
Kasatkin, A. G. Osnovnye protsessy i apparaty khimicheskoi tekhnologii, 7th ed. Moscow, 1961.
References in periodicals archive ?
In the decantation method, the fecal collection tanks need a water circulation system and feces should be collected immediately to prevent nutrient leaching and the consequent overestimation of digestibility.
H] and BC showed a clear interface (with an upper BC-rich phase and a lower PS-rich phase) after 13 days of decantation time.
However, difference in viscosity rates at 25 and 55[degrees]C indicate that temperature is a factor that must be evaluated in the separation process of the biodiesel-glycerin phases by decantation or centrifugation.
The dimensions of the decantation reservoirs will be determined taking into account that the minimum size of the particles to settle in the scale ditch is 200 |im (worst possible case), with a variable decantation time in each reservoir.
The resulting microgels incorporated with Ag NPs were then purified by decantation and dialyzed against frequently changed pure water at room temperature for one hour.
In average, the range on both shaking and decantation periods did not differ regarding soil clay texture classes.
A decantation tank with liquid product handling and recycling system
BIOX([R]) Module 1 neutralization tanks and counter-current decantation thickeners are expected to be commissioned at the end of January 2007 in time for refractory ore feed in February 2007;
The proposed solutions must correspond particularly particularly to the situation where with a flat ground near an eu network, The community wishes to have, On the ground, Without heavy hht works or foundations, A platform allowing the emptying of vehicles type vl and pl technical services, As well as suction sweepers 1 to 5 m 3 , Or other road machines with water recovery platform, And then have the opportunity on the same dock, To carry out a washing machines with integrated treatment by decantation of washing water before discharge to the network.
Processing steps will include crushing, grinding, gravity concentration, cyanide leach, counter-current decantation, Merrill Crowe extraction, and on-site refining to produce dore bars.
La secretaire generale du Parti des travailleurs (PT), Louisa Hanoune, a appele, hier, lors d'une conference de presse animee au siege du parti a Alger, a la [beaucoup moins que] decantation politique [beaucoup plus grand que] a la veille des prochaines elections electorales.
The resultant microgel was purified by centrifugation, decantation and washing with water.