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Case Study 2 A North American tissue mill producing a wide variety of wet strength towel qualities had issues with high energy usage as well as high chemical hypochlorite consumption. In addition significant amounts of steam was used to be able to pulp these wet strength grades. Due to the environmental permits they were restricted in the amount of broke that could be processed as each ton required a lot of hypochlorite. After trials with Cellwood a Krima UCD dispersing system was installed. Today they are running very short batch times in the pulper just enough to be able to pump the flaky pulp to the Krima. The UCD system then treats the pulp and produces a completely de-flaked pulp which can be sent directly to their separate machines. This gives the mill a big flexibility in broke handling and takes away the need to run it through their regular stock preparation. Other benefits are lower energy levels per ton treated and best of all no more chemicals. Figure 5. Wet strength towel before and after UCD Case Study 3 A mill producing newsprint and fine paper was planning to convert the newsprint portion into OCC based light weight liner. The stock preparation was designed with ample cleaning and screening but very little refining. To handle the new challenges they had considered installing more cleaning screening and LC refining. In the end they decided to just install a Krima HDS to tackle all issues. It resulted in a strong sheet and as the Mill manager described it the cleanest sheet on the market. A test was carried out coating before and after samples to show the bleed through rate there was a significant difference. There are many mills planning this type of shift in their production and the HDS could well provide the answer one system one project and problems solved Figure 6. Before and after bleed through the deflaking capability of the Krima Disperser is well illustrated in broke handling systems running wet strength and coated broke RECYCLED FIBRE PROCESSING WORLD PULPPAPER20