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Removal of water-soluble dye (methylene blue) by yeast Saccharomyces cerevisiae
(Universidad EAFIT, 2020) Acosta Rendon, Melissa; Giraldo Estrada, Catalina; Aristizábal Castrillón, Adriana
Saccharomyces cerevisiae was studied for the removal of methylene blue (MB), a reactive dye, from its aqueous solutions in two different approaches, the first one was determining the removal of MB by biosorption. Factors that affect the biosorption process such as dye concentration, biomass concentration and pH were investigated. The maximum percentage of colour removal, 83.50% in 24 h, was obtained on using cultivated yeast concentration of 0.2 g in 45 mL at 30 º C and pH 3.5, with this result it was concluded that the dried biomass of S. cerevisiae can be considered as a good biosorbent material for reactive dyes as MB. Also, a desorption process was made giving as result a desorption percentage of 65.47% in 120 min with methanol used as a solvent. The second approach was to evaluate the biodegradation of the MB dye with the yeast and, due to the nature of the dye, it is suggested that the yeast only performs biosorption and was unable to take MB as the carbon source for its growth.