Biodegradación de colorantes industriales y producción de enzimas ligninolíticas por Coriolus versicolor var. antacticus

F. FORCHIASSIN; L. DIORIO; V.L. PAPINUTTI; L. LEVIN; N. MOUSO

Química y toxicología ambiental en América Latina

Sociedad de Toxicología y Química Ambiental (SETAC) Press

Lugar: Buenos Aires; Año: 2009; p. 160 - 162

Coriolus versicolor var. antarcticus strain BAFC 266 is an Argentinean white rot fungus capable of decolorizing various industrial dyes in Malt extract solid medium as well as when using extracellular fluids from cultures grown in liquid synthetic medium. The aim of the present work was studying the capacity from cultures grown in solid-state fermentation on wheat bran (at initial pHs 3.5 and 5.5) to decolorize Malachite Green (triphenylmethane dye) and the azoic dye Xylidine (Ponceau 2R), and the relationship with the ligninolytic enzymes produced in both media. Best results were obtained with cultures grown at pH 5.5 at day 8 of incubation, showing approximately 70% of decoloration in addition to 20% adsorption, in coincidence with the peak of ligninolytic activities. Cultures grown at pH 3.5 at day 4 adsorbed almost completely both dyes, while their capacity of decoloration increased afterwards. At day 11 maximum growth was attained in this medium, and decoloration reached 80%. Considering the results obtained C. versicolor var. antarcticus growing in wheat bran constitutes an option for bioremediation of colored effluents in short times and with low costs.