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Alfa Laval manufactures polymeric membranes for use in an extensive range of processes applied in the food, beverage, dairy, biotech and pharmaceutical industries. Our flat sheet membranes cover all cross-flow filtration processes: reverse osmosis, nanofiltration, ultrafiltration and microfiltration
Semi-permeable, polymeric flat sheet membrane
The basic technology behind membrane filtration involves using a semi-permeable membrane to separate a liquid into two distinct streams.
Pumping this liquid across the surface of the membrane creates a positive trans-membrane pressure that forces any components smaller than the porosity of the membrane to pass through, forming the permeate. Any components larger than the pore size simply cannot pass through, and remain behind in what is called the retentate.
The surface of the flat sheet membrane is kept free of blockages by the force of the liquid flow moving parallel to the membrane surface.
Alfa Laval flat sheet membranes
Membrane filtration is becoming increasingly popular in high-hygiene processes that include:
- concentration and purification
- clarification and fractionation
- extraction
- product recycling and recovery
- product and effluent upgrading
The range of flat sheet membranes from Alfa Laval covers all cross-flow filtration processes: reverse osmosis, nanofiltration, ultrafiltration and microfiltration. The membranes are available by the metre, as 20 x 20 cm sheets or cut into flat sections to fit into all configurations of the unique plate-and-frame modules, also manufactured by Alfa Laval.