IBMEM - Ing.-Büro für Membrantechnik
Max-Planck-Str.9, 61381 Friedrichsdorf (Frankfurt/Main), Germany
Tel. +49 (0)6172 137-132 - E-Mail: info@ibmem.com
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IBMEM - Ing.-Büro für Membrantechnik
Max-Planck-Str.9, 61381 Friedrichsdorf (Frankfurt/Main), Germany Tel. +49 (0)6172 137-132 - E-Mail: info@ibmem.com |
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Applications
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Membrane Screening
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Products
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Contact
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REVERSE OSMOSIS... Unlike water filtration, that can only remove some suspended materials larger than 1 micron, the process of reverse osmosis (RO) will eliminate the dissolved solids, bacteria, viruses and other germs contained in the water. RO is essentially a pressure driven membrane diffusion process for separating dissolved solutes. The RO is generally used for desalination seawater for its conversion into potable water. The salient features of the process are that it involves no phase change and it is relatively a low energy process. Almost all RO membranes are made polymers, cellulosic acetate and matic polyamide types rated at 96%-99+% NaCl rejection. RO membranes are generally of two types , asymmetric or skinned membranes and thin film composite (TFC) membranes. The support material is commonly polysulfones while the thin film is made from various types of polyamines, polyureas etc. RO membranes have the smallest pore structure, with pore diameter ranging from approximately 5-15 A0 (0.5 nm - 1.5 nm). The extremely small size of RO pores allows only the smallest organic molecules and unchanged solutes to pass through the semi-permeable membrane along with the water. Greater than 95-99% of inorganic salts and charged organics will also be rejected by the membrane due to charge repulsion established at the membrane surface. RO finds extensive applications in the following: Potable water from sea or brackish water Ultrapure water for food processing and electronic industries Pharmaceutical grade water Water for chemical, pulp & paper industry Waste treatment Municipal and industrial waste treatment Process water for boilers |