How is a Reverse Osmosis Membrane Manufactured
The manufacturing process of a reverse osmosis membrane mainly focuses on the production of a porous material. The pricing structure is dependant on two different factors.
One factor is he raw material itself. Another factor is the ease in which the size or size distribution of the pores can be introduced. Depending on the material of the porous membrane, this process can be more difficult to introduce pores into the membrane. For example, Inorganic membranes are formed by compressing and sintering of fine powders onto a pre-prepared porous support. This type of membrane formation is usually a very expensive method, especially if the membrane thickness needs to be consistent or if the pores need to be fine.
Micro filtration or ultra filtration membranes made from Zirconium and/or Titanium may be extremely costly, often exceeding £1000 per m2. As an alternative there is homogenous polymeric membranes. These membranes are considerably cheaper costing less than £10 per m2 to produce.
Alongside this huge advantage, there are some disadvantages. They can be limited in their permeability, is porosity and mechanical strength. These problems may cause the membrane to be unsuitable as the membrane may not be strong enough to deal with certain procedures or the permeability of the product may be a problem as it is too restricted.