The history of ion exchange is marked by many important milestones, notably the development of novel polymeric materials and considerable advances in our understanding of the underlying fundamental principles. Separately, there have been major advances in the design and development of the apparatus and equipment required to perform industrial ion exchange and also for large scale applications in the production of drinking water, like the MIEX® process from Orica. This paper reviews the progress that has been made during the last three years within the research facilities of PWN which have resulted in a new ion exchange process for the direct treatment of water containing high amounts of suspended matter such as surface waters. This new process has been called SIX® and will most likely be operational at a flow of 4000 m3/h by 2012.

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