NF in Comparison to UF and RO
Types of Nanofiltration Membranes
Commercial Applications
Polymeric Nanofiltration Membranes
Polymeric NF Membranes – Active Layer Creation
Fabrication of nanofiltration membranes
Fabrication of nanofiltration flat-sheet membranes
Retention and pure water permeability trade-off
Negative Retention
For a sodium chloride solution on both sides of a membrane the following statement is the description of the Donnan equilibrium
For a sodium chloride solution on both sides of a membrane the following statement is the description of the Donnan equilibrium: The concentration of sodium on side one [divided by] the concentration of [sodium] on side two equals the concentration of chloride on [side two ] divided by the concentration of [chloride] on side one.
Pressure dependent retention
Modeling NF: Extended Nernst-Planck Equation
Modeling NF: Results
Scaling prevention
Fouling & Scaling
Example: Phosphorus Recovery
Organic Solvent Nanofiltration (OSN)
OSN Negative Retention
Conclusion
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