Preliminary evaluation of Pleurotus ostreatus for the removal of selected pharmaceuticals from hospital wastewater

Laura Palli, Francesc Castellet-Rovira, Miriam Pérez-Trujillo, Donatella Caniani, Montserrat Sarrà-Adroguer, Riccardo Gori

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19 Citations (Scopus)

Abstract

© 2017 American Institute of Chemical Engineers The fungus Pleurotus ostreatus was investigated to assess its ability to remove diclofenac, ketoprofen, and atenolol spiked at 10 mg/L each one in hospital wastewater. The degradation test was carried out in a fluidized bed bioreactor testing both the batch and the continuous mode (hydraulic retention time in the range 1.63–3 days). In batch mode, diclofenac disappeared in less than 24 h, ketoprofen was degraded up to almost 50% in 5 days while atenolol was not removed. In continuous mode, diclofenac and ketoprofen removals were about 100% and 70% respectively; atenolol degradation was negligible during the first 20 days but it increased up to 60% after a peak of laccase production and notable biomass growth. In order to identify the enzymatic system involved, further experiments were carried out in flasks. Purified laccase completely transformed atenolol and diclofenac in less than 5 h, but not ketoprofen. In vivo experiments suggested that cytochrome P450 could be involved in diclofenac and ketoprofen degradation, while partial correlation studies confirmed the role of laccase in atenolol and diclofenac degradation. Two intermediates of diclofenac and ketoprofen were detected by nuclear magnetic resonance. Moreover P. ostreatus was able to reduce chemical oxygen demand of the hospital wastewater which is an important advantage comparing to other fungi in order to develop a wastewater treatment process. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 33:1529–1537, 2017.
Original languageEnglish
Pages (from-to)1529-1537
JournalBiotechnology Progress
Volume33
Issue number6
DOIs
Publication statusPublished - 1 Nov 2017

Keywords

  • PhACs
  • bioreactor
  • laccase
  • white rot fungi

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