Discoloration of dyes by Trametes spp

Abstract

The dyes used in the textile industry contribute significantly to pollution of water sources as they are disposed, most of the time, without proper treatment. The objective of this work was to test three strains of two species of the genus Trametes collected in Brazil against the ability to discolor the indigo carmine dye and to detect the activity of the enzymes laccase, lignin peroxidase and manganese peroxidase. The experiment was carried out in Kirk medium under static, non-sterile condition, at ±28 °C for 120 h. Trametes lactinea (URM8350) discolored 81.40% of the indigo carmine dye, T. lactinea (URM8354) 85.09% and T. villosa (URM8022) 96.11%. Laccase was detected in all specimens. Manganese peroxidase was detected in T. villosa (URM8022) and T. lactinea (URM8354), while lignin peroxidase was not detected in any of the isolates under the conditions of the experiment. The discoloration rates observed demonstrate the ability of the strains to discolor carmine indigo and the promising use in the discoloration processes in wastewater from the textile segment.

Screening of some Brazilian fungi and bacteria able to decolor a textile effluent and evaluation of effluent toxicity on Artemia salina

“…Thampraphaphon et al (2022) tested the ability of the fungus T. hirsuta to decolorize a mixed textile dyes (Navy EC-R, Ruby S3B and Super Black G) in a real sample of textile effluent, thus achieving an optimal decolorization of 95.39% in the presence of ammonium nitrate. The species T. lactinea was shown as a source for biotreatment of textile effluent with its ability to remove indigo-carmine dyes with a percentage of 85.06% (Santana et al, 2021). However, there are few articles in the literature that report this organism and its ability to decolor and biodegrade textile effluents.…”

“…Despite the existence in the literature of biological organisms capable of biodegrading textile dyes, such as some species of Trametes, few can be applied to the biotreatment of raw effluent effectively, considering that most of the works use synthetic effluents, which generates the need to further studies or prospecting for new strains with favorable biotreatment characteristics (Monsalve et al, 2017;Santana et al, 2021). Therefore, due to the lack of organisms capable of textile effluent's bioremediation, this work aimed to bioprospect new organisms with bioremediation potential, and in this way contribute to the scenario of biotreatment of Brazilian textile effluents.…”