For removal of dissolved carbon dioxide and oxygen from water
Membrane deaerators are used to remove dissolved carbon dioxide and oxygen from water. Free carbon dioxide, for example, causes a clear increase in the conductivity of water, a key parameter for totally demineralised water.
Water treatment plants using reverse osmosis and electrodeionisation (EDI) require a reduction of the carbon dioxide in the water by membrane degasification.
Membrane degasification is a membrane diffusion process in which hydrophobic porous membranes are used, which are waterproof, but allow gases to pass through unimpeded. The hollow fibre modules used have a very high packing density. Because of the partial pressure gradient, generated by a purge gas (air or nitrogen) or a vacuum, if necessary, the dissolved gas diffuses through the membrane and out of the water. The water, on the other hand, is retained by the membrane.
EnviroFALK membrane deaerators are available
- in various sizes,
- flow capacities and materials