Biological Decolorization of Amaranth, Denim Blue, and Orange G with Trametes polyzona

Uribe-Arizmendi, I.; Anducho-Reyes, M. A.; Ramírez-Vargas, M. R.; Cadena-Ramírez, A.; Muro-Urista, C. R.; Téllez-Jurado, A.

Biological Decolorization of Amaranth, Denim Blue, and Orange G with Trametes polyzona

2020

In this work, the capacity of Trametes polyzona in degrading three textile dyes (amaranth, denim blue, and orange G) to three different concentrations (100, 150, and 200 mg/L) was evaluated. Two growth conditions were tested; in the first condition, the fungus was grown in a defined minimal medium with an initial glucose concentration of 10 g/L and adding the different concentrations of each of the dyes, and in the second condition, the same minimum medium was used but with a concentration of 3 g/L of glucose, after 7 days of fungus growth, at which time the glucose in the medium was completely consumed; each of the dyes was added at the three different concentrations. T. polyzona was able to decolorize the three dyes at the concentrations tested and a 200% increase in the decolorization rate was observed when the medium lacks glucose. Enzymatic activities of laccase, lignin peroxidase, and manganese peroxidase were detected; the enzyme laccase was the one that presented the greatest enzymatic activities in all the media tested. A simultaneous process of adsorption by the mycelium and degradation of extracellular enzymes was observed. A decrease of more than 90% COD was observed and the effluent generated showed no algal growth toxicity.

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