Membrana plana de Ultra Filtracion
The selection of ultrafiltration flat sheet membranes from Alfa Laval covers a broad spectrum of flux properties and molecular weight cut-off values. The membranes are used in an extensive range of processes applied in the food, beverage, dairy, biotech and pharmaceutical industries
Alfa Laval offers a wide range of flat sheet membranes for ultrafiltration (UF) with various molecular weight cut-off (MWCO) values and flux properties. The membranes are available in different series characterized by the nature of the membrane. Common for all series is the unique construction on polypropylene (PP) suppport material which provides optimum cleaning conditions.
The GR ultrafiltration membranes are made of polysulphone or polyethersulphone. The membranes are available in 9 different types with molecular weight cut-off values ranging from 100,000 to 2,000.
The FS membrane for ultrafiltration is made of fluoro polymer and is currently available as FS40PP only with a MWCO value of 100,000.
The RC membrane is available as RC70PP which is made of regenerated cellulose acetate. The MWCO value of this ultrafiltration membrane is 10,000.
Alfa Laval offers two membrane types within the ETNA series: ETNA01PP and ETNA10PP with MWCO values of 1,000 and 10,000 respectively. Both membrane types are made of composite fluoro polymer.
The UFX-pHt ultrafiltration membrane from Alfa Laval is characterized by being resistant to high pH values and temperatures. The membrane is made of polysulphone permanently hydrophilic. It is available as UFX10 pHt with a MWCO value of 10,000.
- cover a broad spectrum of flux properties, pore sizes, molecular weight cut-off values and rejection capabilities
- available by the metre, as standard 20 x 20 cm sheets or cut into flat sections to fit into all Alfa Laval plate-and-frame module configurations
- delivered with necessary lock and passage rings
- suitable for extensive range of processes
- manufactured by Alfa Laval's own membrane centre
Reverse osmosis (RO)
RO uses the tightest possible membrane in liquid separation. In principle, water is the only material that can permeate the membrane. All other materials (salts, sugars, etc.) will be unable to pass through.
NF is not as fine a separation process as reverse osmosis, and uses membranes that are slightly more open. Nanofiltration allows small ions to pass through while excluding larger ions and most organic components.
UF involves using membranes in which the pores are larger and the pressure is relatively low. Salts, sugars, organic acids and smaller peptides are allowed to pass, while proteins, fats and polysaccharides are not.
In MF, suspended solids, bacteria and fat globules are normally the only substances not allowed to pass through.