PRODUCTION OF LIGNINOLYTIC ACTIVITIES WHEN TREATING PAPER PULP EFFLUENTS BY TRAMETES-VERSICOLOR

In this work, the ability of Trametes versicolor to decolorize the eff luents from the alkaline cooking of cereal straw produced at a paper a nd paper pulp making plant is studied. Enzymatic activities related to the metabolism of lignin during fungal treatment have also been evalu ated. The results that have been attained show the necessity of a carb on source for the progress of the decolorization process, which can re ach color elimination values higher than 70%. The study of the enzymat ic activities shows the production (starting from the first hours of t reatment) of laccase activity much higher than that obtained under the same conditions in synthetic growth media. There is also a clear rela tionship between the effluent concentration in the medium and the lacc ase activity. In the decolorization media, manganese-dependent peroxid ase activity has also been detected, when SO4Mn is added to those medi a. No LiP activity was detected in all the conditions assayed.