A hollow fiber membrane is a type of semi-permeable membrane used in reverse osmosis (RO) water filtration systems. It consists of a bundle of tiny, hollow fibers made of a polymeric material such as poly amide or polysulfone.
In reverse osmosis, water is forced through the hollow fibres at high pressure, and the semi-permeable membrane selectively allows water molecules to pass through while blocking contaminants such as dissolved salts, minerals, and impurities.
The hollow fiber membrane in reverse osmosis systems offers a larger surface area for water filtration in a compact space, which makes it ideal for use in residential and commercial water filtration systems. The fibers are typically arranged in a bundle within a cylindrical cartridge, and the system may contain multiple cartridges depending on the required water flow rate.
Reverse osmosis using hollow fiber membranes is an effective and reliable method for producing high-quality, purified water for a variety of applications, including drinking water, food processing, and pharmaceutical manufacturing. It is also used in wastewater treatment and desalination of seawater. The effectiveness of the membrane depends on its quality, pore size, and durability, and regular maintenance and replacement are necessary to ensure the longevity of the system.
We have started to stock Aquaphor reverse Osmosis membranes and they classed as Ultra Filtration (UF)
AQUAPHOR is the only brand of water filters to use hollow fibre UF membrane options in reverse osmosis.
This technology is used for end stage filtration in the Crystal family of filters, as well as the reverse-osmosis Pro Series, made by Mitsubishi, Japan). Aquaphor combine this with an AQUAPHOR-made 0.8 micron carbon block to provide ultimate filtration.
Micro-crystalline activated silver in the carbon block prevents bacteria captured by the filter to reproduce. This increases the working life of the hollow fibre UF module.
Advantages of hollow fibre membranes
Filtration of mechanical impurities (clay, sand, rust) larger than 0.1 micron – Removing clay, sand, rust and colloidal iron particles. Allows for perfectly clear water. Water that has gone through a hollow fibre UF membrane tastes and smells better. But more importantly is safer for human consumption. Small particle pollutants, say, iron hydroxides, can irritate the epithelial wall of the intestines. Cause of a range of digestive dysfunctions.
Filtration of microorganisms and bacteria – It is nearly impossible to reduce pore sizes of conventional filters below 0.7 – 0.8 microns (polypropylene or carbon-block cartridges). This is not sufficient to reliably filter out harmful bacteria. (E. coli is between 0.3 – 6 microns in size. While Staph. aureus has a size of 0.5 – 1 microns.)
Filtration of Giardia cysts – The cyst form of Giardia is like a cocoon. Resistant to external factors. Including chlorination. Most household filters have no reliable anti-Giardia ability. The most effective method of removing Giardia cysts from drinking water is mechanical filtration through a hollow fibre UF membrane.
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