Membrane Filtration Systems
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Membrane filtration is a method of filtering particles from liquids or gases using a membrane. This technique is used for various applications, including dairy processing and wastewater treatment. The semi-permeable membrane keeps large particles out of the permeate while allowing smaller molecules to pass through.
Molecules move from high-concentration to low-concentration areas in a natural way. Using external pressure, molecules can flow from low-concentration to high-concentration areas. The permeate will travel across the membrane at a constant rate due to the difference in stress on both sides of the membrane. This allows for higher overall yields in the permeate or retentate end product.
The four primary methods of pressure-driven membrane filtration are microfiltration, ultrafiltration, nanofiltration and reverse osmosis, in decreasing pore size order.