What Is Filtration? Understanding the Process and Its Importance

It has a lot of importance in everyday life, to maintain people's health. This contributed since its inception discoveries such as filtered water for human consumption. To avoid fatal diseases, in this way promote global health. The theoretical principle of separation is based on examining the relationship between the velocity of a fluid and its flow rate. Indispensable for domestic life and industry, that is why you should know about discover what filtration is.

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History of Filtration investigations

The sleeve has emerged as the practical art, with initial applications in the sandy bed. Carried out in ancient times as the extraction of water for human consumption. Obtaining more care in the twentieth century, by Acarman's 1937 research on porous media. Heertjes 1949, Tiller 1953 in the state of knowledge in distancing, desdeCain 1984 to Kiefer 1991 in the theoretical principles of separation and Norden 1994.

What is filtration?
What is filtration

What is a Filtration?

It is a technique of separation of the mixtures, where a solid poorly soluble settles. Producing large particles subdivision of the solid so that it is retained. In the middle with pores, grooves, filter while filtering is what goes through the pore, groove, paper. It is widely used by mankind. The medium is called, sieves, filter, sieves, also known as cloth or mesh.

How Does Filtration Work?

The basic principle of filtration involves passing a mixture of solid and liquid or gas through a medium that selectively traps the solid particles, allowing the liquid or gas to pass through. The medium used for filtration can be a physical barrier, such as a filter paper, that traps the solid particles by size exclusion or an electrostatic charge. The medium can also be a chemical agent, such as activated carbon or ion-exchange resins, that selectively adsorbs or removes the impurities.

Filtration procedure

The objective is to pass a mixture through a filter that retains particles, obtaining a filtrate that is collected in a container by addressing the following steps:

  • The container where the mixing will be carried out or containing the solution is grabbed.
  • Adding the liquid solvent and then to the solidis subjected to constant heat from the environment, or by supplying heat to it, as appropriate.
  • Proceed to pass the mixture through the strainer, filter, cloth. Several times.

What is filtration for?

It has become a necessary technique in laboratories, it is used to describe biological processes such as wastewater treatment. Components that are not needed are removed, by slow particle absorption with sand. The separation of liquid and particles in a suspension, distance to materials of different composition. It is a technique widely used in chemical engineering.

What is filtration?
What is filtration

What kind of mixture is it the Filtration?

There are two types of mixtures, those whose components are not they can differentiate with the naked eye or with a microscope, you are told mixtures homogeneous. The size of these particles is less than 10-5cm can be two types: Solutions, which have particles smaller than 10-8 cm and their components are recognized as solute and solvent. Where the solute dissolves in the solvent, it is always found in a smaller proportion; the colloids, which has particles between 10-7 and 10-5 cm, have a dispersing phase. What is the solvent and a dispersed phase that is the one that dissolves.

If its components can be distinguished, one speaks of heterogeneous mixtures. These can be of two types: Coarse, with very large particles. Suspensions with smaller particles than coarse ones. Which are suspended in a liquid for a while and then precipitate. So in the case of disuniting it is a heterogeneous mixture. Because its components can be visualized before the application of the diagnostic technique.

Types of Filtration

There are several types of filtration based on the medium used and the application:

1. Mechanical Filtration

Mechanical filtration is the most common type of filtration that uses a physical barrier, such as a mesh screen, to trap the solid particles. This type of filtration is used in air purifiers, vacuum cleaners, and water treatment plants.

2. Biological Filtration

Biological filtration is a type of filtration used in aquariums and fish tanks. It involves the use of living organisms, such as bacteria or algae, to remove impurities from the water.

3. Chemical Filtration

Chemical filtration is a type of filtration that uses chemical agents, such as activated carbon or ion-exchange resins, to selectively adsorb or remove impurities from the liquid or gas. This type of filtration is used in water treatment plants, air purifiers, and food and beverage production.

4. Electrostatic Filtration

Electrostatic filtration is a type of filtration that uses an electrostatic charge to trap the solid particles. This type of filtration is used in air purifiers and vacuum cleaners.

Types of sleeves

Vacuum separation, has the same base as sieving, except that a vacuum pump, Buchnerr funnel and kitasato flask are used. The air is extracted from the flask, so that the disunion is effective and fast, caused by the driving force, atmospheric pressure. Widely used when the selected sample does not filter fluently or due to the time factor of the process. Microfiltration is the separation with membrane where its pores have a difference in size between 0.1 and 1º microns. They allow smaller particles to pass through.

Ultrafiltration is the one that allows separating molecules with molecular weight greater than 10+3, agglutination is achieved. Protein distancing, cauterize bacteria and viruses from water. Nanofiltration binds molecules without electrical charge with molecular mass of 200 dalto/gmol. It is used to demineralize solvents and dissolve organic compounds. Discard the concentration of very large particles using water filters. separationby reverse osmosis: It uses semi-permeable polyamide filters, spiral that holds and boots a lot of water.

It has stages such as, setting aside large precipitates, separate the very large concentrations with a sieve, remove with activated carbon the contaminants and microorganisms. Utility of porous media are varied the use of media to filter such as: the fabric, woven and non-woven fibres, porous solids, felts, perforated solids, polymer membranes, solids particulates, to this is added a large amount of materials such as: fibers natural and synthetic, metallic, ceramic and polymer materials.

In addition to this, some indications for the complexity of the mixture where the filters are used, which are prefiltration materials, pre-house, with a granular and fibrous shape that gives rise to the formation of the filter medium, giving the research process greater ease to cross the filter, giving way to a viscous mass.

Applications of Filtration

Filtration is used in a wide range of applications, including:

  • Water treatment plants for purifying drinking water
  • Air purifiers for removing pollutants and allergens from the air
  • Oil and gas processing for removing impurities from crude oil and natural gas
  • Food and beverage production for removing impurities and improving product quality
  • Pharmaceutical manufacturing for purifying drugs and vaccines


The diversity of apparatuses for performing the action of separating or filters are quite a lot as well as the varieties of porous materials available as filter media. And the peculiar character of utility, of humble appliances. Such as coffee strainers or decanting funnels for separating in the laboratory. Even immense sets of many sophistication such as those used in the oil factory. Where it is purified to recover the expensive accelerators, purified water procedure.  Examples of the topic?

Some of them are: the strainers for making coffee, infusions of tea, the purified water, the buttermilk by cheese-making, fabrics cotton or synthetic. Homemade strainers, hydrocarbons in the industry cooking, cooking pasta or rice, straining juices, the stone bowl. Air, water, oil filters, cigarette, filter paper, ceramic, sewer grates, laundry room and sink, swimming pool nets. Sieving flour, cement, sand, glass, dialysis, wine and alcoholic beverages, sewage, kidneys, liver, lungs.

Examples of common mixtures used to support studies of this type are: diatomaceous soils, expanded nuggets of metal salts.

You saw how interesting it is to have read about discover what a coladero is, it gave you important information on the subject, which you can use to perform tasks in the area of natural sciences, I invite you to consult it whenever you can to clarify any doubts.

Frequently Asked Questions (FAQs)

Q1. What is the difference between filtration and purification?

Filtration is the process of separating solid particles from liquids or gases by passing them through a medium that selectively traps or removes the impurities. Purification is the process of removing impurities, contaminants, or pollutants from a substance, such as water or air, to make it safe and fit for consumption or use. Filtration is one of the methods used for purification.

Q2. How often should I change the filter in my air purifier?

The frequency of changing the filter in your air purifier depends on the type of filter, the level of pollution in your environment, and the manufacturer's recommendations. In general, it is recommended to change the filter every 6-12 months for optimal performance.

Q3. Can filtration remove viruses and bacteria from water?

Filtration can remove some viruses and bacteria from water, but it depends on the size of the particles and the type of filter used. Some filters, such as reverse osmosis and ultrafiltration, can remove bacteria and viruses, while others, such as activated carbon filters, cannot. It is recommended to use a combination of filtration and disinfection methods, such as chlorination or UV treatment, for effective removal of viruses and bacteria from water.


Filtration is a crucial process that we use in our daily lives for various applications. It helps to remove impurities and contaminants from liquids or gases, making them safe and fit for consumption or use. There are several types of filtration based on the medium used and the application, including mechanical, biological, chemical, and electrostatic filtration. The importance of filtration cannot be overstated, as it plays a vital role in protecting our health and the environment.

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