Nanofiltration (NF)

Nanofiltration (NF) is a membrane-based process to effectively remove multivalent ions, pathogens, suspended solids, and larger colloids in wastewater and effluent treatment systems.

NF membranes have a nominal pore size of approximately 0.001 microns and an MWCO of 1,000 to 100,000 daltons. In order to obtain clear product water through such membranes, it is necessary to push water at higher operational pressure than Microfiltration (MF) or Ultrafiltration (UF).

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Typically operating pressure for NF is near 6-15 barg (600-1500 kPa). Nanofiltration (NF) is an efficient membrane process for water softening and helps remove hardness from water which makes the NF process suitable for pretreatment to reverse osmosis. 

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GreenPebble Technologies (GPT) selects and designs proprietary NF membrane systems as part of its water treatment design strategy depending on the requirement and end-use.  

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Applications of NF

- Separation and purification of biochemical or biotech components

- Resource recovery for the separation of macromolecular components

- Dyes and intermediate recovery and separation

- Water softening

- Low-pressure separation

- Purification or extraction of flavours, extracts for the food and beverage industry

- Zero Liquid Discharge