Screening for a more sustainable solution for decolorization of dyes and textile effluents using Candida and Yarrowia spp.

Marta Mendes, Ana C. Cassoni, Soraia Alves, Manuela E. Pintado, Paula M. L. Castro, Patrícia Moreira*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Dyed effluents from textile industry are toxic and difficult to treat by conventional methods and biotechnological approaches are generally considered more environmentally friendly. In this work, yeast strains Candida parapsilosis, Yarrowia lipolytica and Candida pseudoglaebosa, isolated from wastewater treatment plants, were tested for their ability to decolorize textile dyes. Both commercial textile synthetic dyes (reactive, disperse, direct, acid and basic) and simulated textile effluents (a total of 32 solutions) were added to a Normal Decolorization Medium along with the yeast (single strains and consortia) and the decolorization was evaluated spectrophotometrically for 48–72 h. Yeasts were able to perform decolorization through adsorption and biodegradation for 28 of the dyes and simulated effluents by more than 50%. Y. lipolytica and C. pseudoglaebosa presented the best results with a true decolorization of reactive dyes, above 90% at 100 mg l−1, and simulated effluents at 5 g l−1 of concentration. Enzyme production was evaluated: oxidoreductase was found in the three yeasts, whereas tyrosinase was only found in Y. lipolytica and C. pseudoglaebosa. Y. lipolytica and C. pseudoglaebosa are a potential biotechnological tool for dye degradation in textile wastewaters, especially those containing reactive dyes and a promising tool to integrate in bioremediation solutions, contributing to circular economy and eco sustainability in the water sector since the treated water could possibly be reused for irrigation.
Original languageEnglish
Article number114421
Number of pages9
JournalJournal of Environmental Management
Volume307
DOIs
Publication statusPublished - 1 Apr 2022

Keywords

  • Biodegradation
  • Candida pseudoglaebosa
  • Decolorizing yeasts
  • Dye decolorization
  • Synthetic effluent
  • Yarrowia lipolytica

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