Membrane filtration for water treatment
During the past decade, membrane technologies have gained in importance in the water treatment segment and are justifiably regarded as the technology of the future. This is easy to understand as they guarantee efficient and environment-friendly purification with a minimal use of chemicals. Moreover, ultrafiltration membranes have established a position in the drinking water sector due to the fact that they filter water to such an extent that it is virtually free of solids. Bacteria, parasites and viruses are not killed off, but entirely removed from the drinking water.
The technology and process involved are relatively simple, membranes representing very fine filters, which act like sieves through which water is either pressed or sucked. Any content, which is larger than the microscopic pores, is separated out and depending on the fineness of the filter, a differentiation is made between micro-, ultra- and nanofiltration. Reverse osmosis is an additional variation, in which only water molecules pass through the membrane.
WABAG has been using this membrane process in combination with conventional cleaning processes for many years and due to this experience and in-house innovations, has built up a pool of comprehensive expertise. Company know-how relates to an extensive knowledge of the performance and applications of the various membrane types and combinations with other treatment phases to meet specific requirements on a case-to-case basis. WABAG offers a diversity of membrane processes and selects the best and lowest-cost variation for each application.
Other advantages of membrane filtration are:
- Low space requirement
- Modular design
- Membranes as absolute barriers
In Switzerland alone, WABAG has equipped ten municipal water treatment plants with membrane technology. The Männedorf lake water treatment plant is regarded as the most modern waterworks in the country due to the process chain and technology employed.
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