Decolorization of Orange II dye by white-rot fungi

Agitation, temperature, inoculum size, initial pH and pH of buffered medium affected the decolorization of Orange II dye by Coriolus versicolor and Fu nalia trogii. The optimum temperature and initial pH value for decolorizati on were 30 degreesC and 6.5-7.0, respectively; pH 4.5 was the most efficien t in buffered cultures. High decolorization extents were reached at all agi tation rates. At an inoculum size of more than 1 mt, the extent of decolori zation changed only slightly. High extents were obtained using immobilized fungi at repeated batch mode.