he production of clean water is necessary in a great variety of industrial sectors with Increasingly stricter specifications for clean water and rising demand require efficient production of clean water. Normally mixed bed ion exchangers or electrical deionisation plants (EDI) are used for this purpose. Researchers at the Karlsruhe Institute for Technology (KIT) have developed a magnetically supported EDI which makes it possible for significantly larger membrane intervals to be achieved. The cell spacing gaps are filled with mixed bed ion exchangers, as they are in conventional EDIs. In contrast to the statistical arrangement of the mixed bed in a conventional EDI, however, the arrangement of the mixed bed when magnetically supported is structured in an optimum way, which means that the number of membranes required can be substantially reduced.As a result, the complexity of the structure is reduced, as fewer components such as flow dividers are required, and at the same time less pressure loss is experienced due to the larger membrane intervals and diameters of the intakes. The production of clean water by magnetic EDI promises process optimisation and also cost reduction.