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A decanter centrifuge applies a force equivalent to several thousand G's, which reduces the settling time of the particles. It is also favoured to maintain a large G-force, which will result in an improved separation. [8] The rate at which sedimentation occurs is an important characteristic of the decanter centrifuge separation process.
Decanter centrifuges, in which there is no physical separation between the solid and liquid phase, rather an accelerated settling due to centrifugal acceleration. Though most modern centrifuges are electrically powered, a hand-powered variant inspired by the whirligig has been developed for medical applications in developing countries. [9]
They are the most commonly used centrifuge for the density-gradient purification of all particles except cells, and, whilst swinging buckets have been traditionally used for this purpose, fixed-angle rotors and vertical rotors are also used, particularly for self-generated gradients and can improve the efficiency of separation greatly.
In 1953 Flottweg expanded its into a business sector: the production of liquid-solid separation machines. The first product was the Flottweg Decanter, a solid bowl decanter centrifuge; the first model, DECANTER Z1, was sold to BASF. Further development lead to a higher speed and more efficient decanter in 1964.
An Alfa Laval decanter centrifuge used in olive oil production in Greece Old ALFA-LAVAL logo to be put on farms where their equipment was used. Alfa Laval AB is a Swedish company, founded in 1883 by Gustaf de Laval and Oscar Lamm. The company started by providing centrifuges to dairies to be used to separate cream from milk.
The decanter is a large capacity horizontal centrifuge rotating approximately 3,000 rpm, the high centrifugal force created allows the phases to be readily separated according to their different densities (solids > vegetation water > oil). Inside the decanter's rotating conical drum there is a coil that rotates more slowly, pushing the solid ...
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