Enhanced Decolourization of Solar Orange RSN by White-rot Fungus Ganoderma lucidum IBL-05

摘要

This study deals with the process optimization of biological decolourization of dye solar orange RSN,a synthetic textile by Ganoderma lucidum IBL-05.In initial time course study of 10 d,a maximum decolourization(55 ± 3 %)of solar orange RSN was caused by Ganoderma lucidum IBL-05 after 7 d.The effect of media composition,initial pH of the solution,incubation temperature,carbon and nitrogen additives and initial dye concentration was investigated.Maximum dye decolourization(92 ± 4 %)was achieved in basal nutrient medium II containing 0.01 % solar orange RSN and supplemented with 1 % glucose and maize seed meal after 3 d incuba-tion at pH 4.5 and 30 °C.The ligninolytic profile of G.lucidum IBL-05 was also investigated and manganese per-oxidase was the dominant enzyme activity involved in bio-degradation of solar orange RSN with minor activities of lig-nin peroxidase and laccase.