Nano Filters (NF)

Ahura Aqua designs & manufactures nanofiltration systems for industrial applications including wastewater recovery or manufacturing process of food & beverage or pharmaceutical industry. Nanofiltration works on the same fundamental working principle as reverse osmosis where a high concentration solution is passed through a semi-permeable membrane under forced pressure. The pore sizes of an NF membrane typically range from 0.01 – 0.001 microns, this factor places it smack in the middle of UF membrane which allows slightly more passage of salt & RO membrane which comparatively allows lesser passage of salt.

Typically, organic molecules with molecular weights > 200 – 400 are rejected. Nanofiltration systems effectively reject a wide range of contaminants such as:

• Dissolved organics.
• Endotoxins/pyrogens.
• Insecticides/pesticides.
• Herbicides.
• Antibiotics.
• Nitrates.
• Sugars.
• Latex emulsions.
• Metal ions.

It can also partially reject soluble salts. Monovalent salts such as NaCl or CaCl have rejections of 20 – 80% whereas divalent salts such as MgSO4 have higher rejections of 90– 98%.