15 Filtration Examples

The filtration is a process of separation of a substance solid of a liquid in which it is suspended, from a mechanical means called a sieve, filter or sieve. The sieve is a porous medium that allows the passage of molecules smaller in size and of the ductile molecules of the water, but retains the larger particles of the solid. For example: pasta cooking, juice straining, air filters.

Some filters are fabrics, plastic or metallic nets and different types of papers. Leakage is perhaps one of the most used methods both industrially and daily to separate solids from a suspension or to rescue bulky objects from some liquid substance.

According to the size of the particles and the nature of the mix, some methods of separation of its components can be classified into:

It can serve you:

Filtering examples

1. Coffee preparation. The ground coffee is served directly into a strainer (cloth or paper) and boiling water is poured over it. The paper allows the passage of the finest particles, which have a strong flavor and the properties of coffee, while the “wipe” or solid residue from the coffee powder remains in the filter and not in the Bowl.
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2. Pasta cooking. The pasta must be cooked in boiling water to hydrate and regain its elasticity and characteristic texture, but it is consumed out of water, so it must be strained allowing the water to drain and the cooked pasta to remain in the strainer.
3. Juice Straining. In the production of many juices, the fruit is blended into whole pieces with water or the pulp is squeezed to obtain the juice. Whatever the case, it must then be strained to separate the solid fiber or pulp residues from the liquid itself.
4. Preparation of infusions. Many teas and infusions are made from fresh grass, deposited in strands in boiling water. Once the substances contained therein are released, they are strained to extract the solid strands and leave the liquid in the cup.
5. Air filters. In many closed environments or even in the air injection system to automobile engines, filters are used to retain impurities suspended in the air, such as dust particles and other tiny solid elements, to keep the air entering the room as clean as possible system. The same goes for the dryer filter, which collects lint and textile debris from the air.
6. Water filters. A water filter is often used in homes to remove impurities before using it for domestic use. These filters usually consist of porous stones that allow the passage of water but retain the tiny particles and substances that accompany it.
7. Oil filters. In engines combustion Oil filters are used to retain the carbon particles produced by the hot circulation of these lubricants, thus keeping the particles retained in the filter and the oil as clean as possible, extending the useful life of the machinery.
8. Tinajeros or stone filters. They were water purification devices used in colonial times in houses, based on the passage of water from a higher container to a lower one through a porous stone.
9. Sewer grates. The metal grates at the mouth of the sewers work as sieves to keep out the large ones solid waste and prevent clogging of drainage pipes through which rainwater comes down.
10. Pool nets. Used for cleaning the water, they retain the insects, leaves and debris in general in solid state that are suspended in the water and allow the liquid to pass through, thus serving as a cleaning tool.
11. Flour sieving. Often the flour (solid) through a sieve or strainer, not only to clean it of any residue or insects, but to aerate it and allow a greater fluffiness in the desserts and avoid the formation of lumps.
12. Cement sieving. In construction preparations, cement powder is often sifted before mixing, to avoid that the particles of the material come already adhered or grainy and thus guarantee that the mixture is homogeneous.
13. Dialysis. In patients with kidney failure, a blood filtering task is necessary, which removes the unnecessary toxins and waste: this is called dialysis and is done through machinery specialized. The kidneys would become the natural blood filter.
14. Filter paper. Used in laboratories to separate water and easily soluble substances such as sugar, salt or sand, it is a porous paper that retains even very small particles but allows the passage of Water.

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