Ozone is a very powerful and reactive oxidant eliminating the need for large reactors with long retention times. In addition, the reaction products of ozone are harmless water and oxygen. Ozone reacts very rapidly with the pulp constituents and the reaction takes place primarily in the mixers. The mixing is therefore a key issue in medium consistency ozone bleaching. GL&V has both reliable and highly efficient mixers designed for the tough task of mixing ozone with the medium consistency pulp suspension.
Ozone stage can be used on a variety of pulp and can be used alone or in combination with Chlorine Dioxide the in the first bleach stage. An ozone stage has been found to be particularly beneficial for the production of dissolving pulp where it possible to adjust the pulp viscosity. Ozone alters the cellulose crystalline structure therefore it improves the reactivity of the final bleached dissolving pulp.