The reject system handling is getting more and more difficult recently because not only of worse quality of raw material but also of the change of flow concept. For the latest screening system, coarse and fine screening can be combined. This change has been available by technological development of pulping and screening. At the same time, coarse and fine rejects are mixed together and the reject contains contaminants with much kind of size and character. Usually several machines and not so

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... energy are necessary to treat this reject, but Combisorter TM which is combined with screening, deflaking, and dewatering function within one machine should be the best solution for simple flow system. This article shows the introduction of Combisorter TM and its advantage for the optimization of reject system.