Fungal treatment of humic-rich industrial wastewater: application of white rot fungi in remediation of food-processing wastewater

Mostafa Zahmatkesh, Jules B. van Lier, Henri Spanjers

Research output: Contribution to journalArticleScientificpeer-review

11 Citations (Scopus)
20 Downloads (Pure)

Abstract

This paper presents the results of fungal treatment of a real industrial wastewater (WW), providing insight into the main mechanisms involved and clarifying some ambiguities and uncertainties in the previous reports. In this regard, the mycoremediation potentials of four strains of white rot fungi (WRF): Phanerochaete chrysosporium, Trametes versicolor, Pleurotus ostreatus and Pleurotus pulmonarius were tested to remove humic acids (HA) from a real humic-rich industrial treated WW of a food-processing plant. The HA removal was assessed by color measurement and size-exclusion chromatography (SEC) analysis. T. versicolor showed the best decolorization efficiency of 90% and yielded more than 45% degradation of HA, which was the highest among the tested fungal strains. The nitrogen limitation was studied and results showed that it affected the fungal extracellular laccase and manganese peroxidase (MnP) activities. The results of the SEC analysis revealed that the mechanism of HA removal by WRF involves degradation of large HA molecules to smaller molecules, conversion of HA to fulvic acid-like molecules and also biosorption of HA by fungal mycelia. The effect of HS on the growth of WRF was investigated and results showed that the inhibition or stimulation of growth differs among the fungal strains.

Original languageEnglish
Pages (from-to)2752-2762
Number of pages11
JournalEnvironmental Technology
Volume38
Issue number21
DOIs
Publication statusPublished - 12 Jan 2017

Keywords

  • humic acid
  • industrial wastewater
  • laccase
  • mycoremediation
  • White rot fungi

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