Factors affecting polycyclic aromatic hydrocarbon biodegradation by aspergillus flavus
Al-Dossary, M.A., S.A. Abood, and H.T. Al-Saad.
The ability of fungi isolated from highly contaminated soil to biodegrade PAH compounds was investigated, as was the effect of several parameters on their biodegradation ability. The top-performing fungi, Aspergillus flavus and Aspergillus fumigatus, were selected to test their ability to biodegrade PAH compounds as single isolates. After 15 days of incubation, A. flavus degraded 82.7% of the total PAH compounds, with the complete degradation of six compounds, whereas A. fumigatus degraded 68.9% of the total PAHs, with four aromatic compounds completely degraded. The degradation process was optimal at a temperature of 30°C, pH of 5.5, and with nitrogen in the form of yeast extract. Under these conditions, 95.87% of the total PAHs, including 11 aromatic compounds, were completely degraded after incubation. This suggests that A. flavus is a potential microorganism for the degradation of PAH compounds in aqueous cultures
Link to DOI:https://doi.org/10.1002/rem.21658