Nano - Filtration is a low to moderately high pressure (typically 50 - 450 psig) process in which monovalent ions will pass freely through the membrane but highly charged, multivalent salts and low molecular weight organics will be rejected to a much greater degree. Typical NF applications include water softening, desalination of dyestuffs, acid and caustic recovery and color removal.
- Passes Monovalent Salts, Water, Acids and Alkaline Compounds
- Retains Divalent Salts and Organics
- Captures Parasites Giardia, Cryptosporidium or Amoeba
- Captures Hazardous Metals Lead or Mercury
- Captures Toxic Chemicals Chlorine, Insecticides, Pesticides and RADON
- Eliminates Bad Taste and Odor
A Closer Look at Advanced Nano-Filtration (NF)
Crossflow membrane filtration controls the effect of concentration polarization and the gel layer. It provides the most rapid, and hence economic, continuous membrane filtration.
NF is a pressure driven process for separating larger size solutes from aqueous solutions by means of a semi-permeable membrane. This process is carried out by having a process solution flow along a membrane surface under pressure. Crossflow membrane filtration uses a high cross flow rate to enhance permeate passage and reduce membrane fouling. Retained solutes (such as dissolved salts) leave with the flowing process stream and do not accumulate on the membrane surface.