Nano filtration water treatment is much the same as reverse osmosis technology. The key difference is the lower rejection levels - Nano Filtration is used where the high salt rejection of reverse osmosis is not necessary.
http://www.raindancewatersystems.com/Nano-Filtration-NF.html
Nanofiltration is also emerging as an environmentally friendly alternative to traditional water softener systems for removing hardness from water. Following are two charts that demonstrate the relative effectiveness of Reverse Osmosis (RO) relative to Nanofiltration (Nano) and other common filtration technologies. The second chart also provides some insight regarding the size of the particles that are able to pass through various types of filters.
http://aquaclearllc.com/technical-info/reverse-osmosis-vs-nanofiltration-and-other-filtration-technologies/
Nanofiltration is a membrane filtration-based method that uses nanometer sized cylindrical through-pores that pass through the membrane at 90°. Nanofiltration membranes have pore sizes from 1-10 nanometers, smaller than that used in microfiltration and ultrafiltration, but just larger than that in reverse osmosis.
https://en.wikipedia.org/wiki/Nanofiltration
Reverse Osmosis vs. Nanofiltration and Other Filtration Technologies adminaq 2018-01-12T23:10:09+00:00 Reverse Osmosis (RO) and Nanofiltration (Nano) are two very similar technologies. In appearance they are virtually identical and both use essentially the same technology to remove impurities from water or other liquids.
http://aquaclearllc.com/technical-info/reverse-osmosis-vs-nanofiltration-and-other-filtration-technologies/
Comparison of Reverse Osmosis with Nanofiltration and Other Filtration Technologies. Reverse Osmosis (RO) and Nanofiltration (Nano) are two very similar technologies. In appearance they are virtually identical and both use essentially the same technology to remove impurities from water or other liquids.
http://aquaclearllc.com/technical-info/reverse-osmosis-vs-nanofiltration-and-other-filtration-technologies/
Nanofiltration (NF) is a relatively recent membrane filtration process used most often with low total dissolved solids water such as surface water and fresh groundwater, with the purpose of softening (polyvalent cation removal) and removal of disinfection by-product precursors such as natural organic matter and synthetic organic matter. [1] [2]
https://en.wikipedia.org/wiki/Nanofiltration
Nanofiltration is a slightly newer technology, although it has been in use for drinking water applications since the mid ’90’s and by early 2000 there were over 9000 Nano membranes being used to purify drinking water for 500,000 people living in an area outside of Paris.
http://aquaclearllc.com/technical-info/reverse-osmosis-vs-nanofiltration-and-other-filtration-technologies/
Still, Nanofiltration is the least used method of membrane filtration in industry as the membrane pores sizes are limited to only a few nanometers. Anything smaller, reverse osmosis is used and anything larger is used for ultrafiltration.
https://en.wikipedia.org/wiki/Nanofiltration
Nanofiltration is a membrane filtration-based method that uses nanometer sized through-pores that pass through the membrane. Nanofiltration membranes have pore sizes from 1-10 nanometers, smaller than that used in microfiltration and ultrafiltration, but just larger than that in reverse osmosis.
https://en.wikipedia.org/wiki/Nanofiltration
Reverse Osmosis vs. Nanofiltration and Other Filtration Technologies. Reverse Osmosis (RO) and Nanofiltration (Nano) are two very similar technologies. In appearance they are virtually identical and both use essentially the same technology to remove impurities from water or other liquids.
http://aquaclearllc.com/technical-info/reverse-osmosis-vs-nanofiltration-and-other-filtration-technologies/
what is nanofiltration
Nanofiltration is a membrane filtration-based method that uses nanometer sized cylindrical through-pores that pass through the membrane at 90°.