Nano Filtration
Nanofiltration is a filtration process using a nanoporous membrane that is used in waters with low total dissolved solids. The purpose is to remove polyvalent ions, in addition to disinfecting it by retaining organic matter.
The process uses a pressure-controlled membrane, whose ability to repel ionic or molecular molecules is an intermediate filtration between ultrafiltration and reverse osmosis.
Compared to ultrafiltration and reverse osmosis, nanofiltration is a difficult process to define and describe
The specific properties of nanofiltration membranes are mainly a combination of very high removal capacity (>99 %) for multivalent ions combined with low to moderate removal capacity (
Organic compounds have a higher molecular mass than membranes. The mass transport mechanism is highly dependent on the membrane structure and the interactions between the membrane and the transport molecules. Separation efficiency can be controlled by screening effects (where nanopore size and solute particle size play an important role) or the dissolution and diffusion properties of the solute particles.
In the case of charged particles, the electric field has a certain transport effect. Three parameters are important for the performance of a nanofiltration device: solvent permeability or membrane flux, solute removal and yield or recovery. Let us consider the most important expressions that can predict the separation efficiency of nanofiltration.
Nanofiltration is a cross-flow filtration technology. The pore size of the membrane is approximately 1 nm, and the pressure to use it (75 psi) is less than that of reverse osmosis (150 psi).
Eco Tex Chem Pvt Ltd provides nanofiltration for industries such as Drug manufacturing, Production of dairy products, Textiles, Industrial kitchens, Drinking water and Medical laboratory water