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How does a nanofiltration system work?

Dec 11, 2018

The nanofiltration technology of the nanofiltration system is a membrane separation technology which is separated from the reverse osmosis technology.It is generally believed that there exists a nanoscale Nanofiltration membrane pores, and intercept rate greater than 95% of the smallest molecules is about 1 mm, so this kind of membrane separation technology in recent years been named: Nanofiltration, hereinafter referred to as: NF, Chinese translated as: Nanofiltration.In the past for a long time, nanofiltration membrane is called the ultra low pressure reverse osmosis membrane (LPRO: LowPressureReverseOsmosis), or the reverse osmosis membrane selectivity or loose reverse osmosis membrane (LooseRO: LooseReverseOsmosis).

reverse osmosis equipment

Japanese scholar yasuhiro otani once defined the separation performance of nf membrane specifically: the membrane whose operating pressure is no more than 1.50mPa, whose molecular weight is no more than 200 ~ 1000, and whose interception rate of NaCl is no more than 90% can be considered as nf membrane [1].At present, nanofiltration technology has been separated from reverse osmosis technology and become an independent separation technology between ultra-filtration and reverse osmosis technology. It has been widely used in many fields such as seawater desalination, ultra-pure water manufacturing, food industry and environmental protection, and has become an important branch of membrane separation technology.