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What is ultrafiltration?

Released Date: May 06,2015 Article Source: Yuanlai Water Treatment
Ultrafiltration in water treatment refers to a solution separation process driven by the pressure difference on both sides of the membrane and based on the principle of mechanical sieving. The operating pressure is usually 0.2-0.6MPa, and the separation pore size is 1nm-0.1μm. Ultrafiltration technology is widely used in the separation, concentration and purification of substances.

Ultrafiltration in water treatment refers to a solution separation process driven by the pressure difference across the membrane and based on the principle of mechanical sieving. The pressure used is usually0.2-0.6MPaSeparation pore size1nm-0.1μmUltrafiltration technology is widely applied in the separation, concentration and purification of substances. The ultrafiltration process involves no phase change and transformation, operates at room temperature, and is particularly suitable for the separation of heat-sensitive substances. It also has excellent heat resistance, acid and alkali resistance, and oxidation resistance, and can be used in60℃ BelowPHfor2-11It can be used continuously for a long time under certain conditions.

It should be noted that At present, almost all the ultrafiltration technologies adopted in China have no effect on removing inorganic calcium and magnesium ions dissolved in water. Therefore, the hardness of water after ultrafiltration hardly changes. This kind of water is only very clean water, but its chemical composition is not much different from that of tap water. Judging from the ion content, it is very unsuitable for direct drinking. If the hardness is relatively high, it is not suitable to be directly heated in equipment such as water heaters.

Technically speaking, the only physical methods that can remove hardness are nanofiltration andROReverse filtration.

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