Non-wood fibers such as reeds., wheat straw and bagasse are today used in many parts of the world as raw material for production of chemical pulps. They represent an alternative to hardwood pulps in end products such as printing and writing papers. During the last decade the development activities in the pulp and paper industries have been focused on reducing the effluent load from the bleaching processes, especially with regards to chlorinated organic compounds. Chemical pulps based on non-wood fibers are today normally bleached with chlorine and /or hypochlorite resulting in a large generation of chlorinated organic compounds. This presentation will discuss different ways and process solutions to reduce the use of chlorine based chemicals and thereby the discharge of chlorinated organic compounds. The solutions are to be found all over the fiberline, from raw material pretreatment to pulp bleaching. Key process technology such as oxygen delignification, washing improvement and ECF bleaching will be discussed.
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