Liquid filtration materials play an important role in modern industry and daily life, widely used in water treatment, food processing, pharmaceutical, chemical and other fields. Now, let's get to know this amazing material!

Liquid filtration material refers to the material that can effectively retain the suspended particles or impurities in the liquid, and make the liquid pass through to achieve the purpose of purification, separation or clarification. Its basic principle is liquid through the pore or mesh structure of the material. In this process, the particles are retained due to the volume is larger than the pore size.

Filtration classification of liquid filter material

Pore size is an indispensable part in the selection of liquid filtration materials. Different filter materials have different pore sizes, and the precision of filtration determines the size of the particles it can retain. According to the size of the pore size of the filter material, liquid filtration can be categorized from micro to macro into microfiltration, ultrafiltration, nanofiltration, reverse osmosis and microfiltration.

●Microfiltration

The pore size of microfiltration is in the range of 0.1-10 μm, and is mainly used to remove large suspended particles, bacteria and some macromolecular organic matter. This type of filtration is widely used in drinking water treatment, food and beverage industry and pharmaceutical industry.

●Ultrafiltration

Ultrafiltration has a pore size range of 0.01-0.1μm and is capable of removing viruses, colloids and dissolved organic matter. It is suitable for the treatment of proteins, large molecule compounds, etc. This type of filtration is mainly used in scenarios such as milk concentration, drug separation and wastewater treatment in the food industry, especially in the pharmaceutical industry for separating biological macromolecules in solution.

●Nanofiltration

Nanofiltration has a pore size of 1-10 nanometers and is suitable for the removal of small organic molecules, dimethyl or multivalent examples, etc. It also allows the passage of some monovalent ions such as sodium ions. This type of filtration is commonly used for softening drinking water, wastewater treatment, and classification of food and beverages.

●Reverse Osmosis

With a pore size of less than 0.0001 micron, reverse osmosis is the most efficient form of liquid filtration, capable of removing almost all dissolved salts, viruses, bacteria and organic molecules. This type of filtration is widely used in desalination, pure water production and ultrapure water preparation in industries such as semiconductor manufacturing.

l   Macrofiltration

The pore size of Macrofiltration is generally larger than 10μm, and is mainly used to remove larger suspended particles and sediments, such as sand, debris, or other larger particles of impurities. This type of filtration is widely used in pre-treatment before wastewater treatment or in the primary filtration stage of industrial processes.

In general, filter media with a pore size of more than 10 μm are also known as macroporous filter media, i.e., macrofiltration. Large pore size filter media provide fast filtration and high flow rates, but are unable to filter out smaller particles.

In contrast, small pore size filter media refers to filter media with a pore size of less than 10μm, which is subdivided into microfiltration, ultrafiltration, nanofiltration and reverse osmosis. Small pore size filter media have high filtration precision and can remove fine particles and even dissolved ions. However, the flow rate of this type of filter media is slower, and the pressure requirement during processing is higher.

In essence, there is no difference between different filtration methods. Consider different application needs and filtration accuracy requirements when selecting the right liquid filtration material. Smaller pore size means higher filtration precision, more strict and professional application scenarios, but the cost and processing requirements are also higher. Therefore, in practical applications, in addition to considering the size of the pore size, processing requirements and cost-effectiveness also need to be taken into account. Only in this way can you select the most efficient and cost-effective liquid filtration material.