A centrifugal filter separates materials of different densities spun in a centrifuge, commonly used to separate waste products from liquids. Different sized filters can be used to separate particles. The liquid left over can often be reused, reducing waste and expenses. The first known use was to separate milk from cream, and today they are commonly used in medical and biological laboratories.
A centrifugal filter is a type of barrier that can be used to separate materials after they have been spun in a centrifuge. When a centrifuge is equipped with a filter, high density solids or liquids can be effectively removed from low density liquids. In many industries, a centrifugal filter is used to separate waste products from certain liquids, which can then be reused by the business.
Materials that are fed into a centrifuge are spun around an axis in the center of the machine. The denser materials are pushed towards the outer edge of the container while the lighter materials float towards the axis. When equipped with a centrifugal filter, heavier and lighter materials are pushed into different containers. Different sized filters can be used to separate different sized particles from each other.
A centrifugal filter is usually used to separate solid matter from a liquid suspension. This allows the liquid part of the material to be recycled. Solid matter that is removed from a liquid through a centrifugal filter usually comes out as a slurry. The wet material can then be dried, either in a special holding container inside the centrifuge or in a separate container until it can be disposed of.
Centrifugal filters are used by different sectors. They can be used to clarify used oil, clean glass or ceramic grinding fluids or remove small metal particles from liquids. The liquid left over after centrifugal filtration can often be reused once cleaned. This reduces waste materials and reduces the expenses of a business.
A relatively simple tool, the centrifuge has been used for hundreds of years to separate materials of different densities. The centrifuge spins from a couple of hundred to many thousands of revolutions per minute. The force acting on materials placed in a centrifuge can be thousands of times the force of gravity. This level of force is what allows heavier materials to move towards the outside of the container while lighter materials move towards the centre.
The first known use of the centrifuge was to separate milk from cream. The first centrifuges were powered by hand, although they were still capable of creating a force many times the force of gravity. In 1869, the use of the centrifuge in the laboratory led to the discovery of nucleic acids, which separate from organic cells. Today, centrifuges are most commonly used in medical and biological laboratories.
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