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NF - Nanofiltration

Nanofiltration (NF) is a membrane filtration technology designed to eliminate particles larger than 0.001 microns in size from liquids. This encompasses the removal of ions like calcium and magnesium, as well as organic molecules such as pesticides and herbicides. NF finds application in diverse sectors, including water and wastewater treatment, food and beverage processing, and pharmaceutical manufacturing.

Typically constructed from thin-film composite (TFC) materials, NF membranes consist of a thin polyamide layer atop a support layer made of polysulfone or polyethersulfone. These membranes are organized into modules, typically operating in crossflow, where the liquid being treated is pumped across the membrane's surface. This dynamic flow creates a shear force, aiding in the prevention of membrane fouling.

Key advantages of NF include:

  1. Efficient removal of dissolved solids, particularly divalent ions.
  2. Versatility, allowing for application in a wide range of industrial processes.


NF is used in a wide variety of industries and applications, including:

  • Removal of hardness from water
  • Removal of harmful compounds, even from high pH streams
  • Concentration of organics for the food, beverage and life science industries
  • Partial demineralization

Our NF products

MANN+HUMMEL has a wide portfolio of NF membranes that can cover the different applications, size and configuration. We can also produce customized product in accordance with specific requirements.

Dive into our NF products:

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