Purnomo AS, Fauzany US, Rizqi HD, Alkas TR, Kamei I. Biodecolorization and biotransformation of methylene blue using mixed cultures of brown-rot fungus
Daedalea dickinsii and filamentous fungus
Aspergillus oryzae: identification of metabolites and degradation pathway.
RSC Adv 2024;
14:5061-5068. [PMID:
38332787 PMCID:
PMC10851058 DOI:
10.1039/d3ra08544a]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 01/25/2024] [Indexed: 02/10/2024] Open
Abstract
This study aimed to examine biodecolorization and biotransformation of methylene blue (MB) using mixed cultures of brown-rot fungus Daedalea dickinsii and filamentous fungus Aspergillus oryzae. In addition, the ratio of D. dickinsii and A. oryzae in mixed cultures was 1 : 1, and the sample was incubated at 30 °C for 7 days in liquid medium potato dextrose broth (PDB). The results showed that the sample had the ability to remove and transform 95.24 mg L-1 MB. In this study, mixed cultures had the highest removal percentage of 64.77%, while values of 5.94% and 36.82% were obtained for single cultures of D. dickinsii and A. oryzae, respectively. LC-TOF/MS analysis results showed that peak intensity of MB compound (m/z 284) in each treatment chromatogram decreased compared to the control. The metabolites of decolorization by D. dickinsii were C15H16N3S, C16H19N3SO, and C16H21N3SO, while C31H48N3S+ was obtained using A. oryzae. For mixed cultures, the metabolites obtained included C26H37N2O3S, C9H8N2O3S, C28H38NO2S, and C27H27N5S2. Based on the results, mixed cultures of D. dickinsii and A. oryzae had a high MB decolorization and could be used in the textile industry.
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