Influence of physicochemical factors and thermophilic fungus-produced polyphenol oxidase on phenolic compounds during the treatment of palm oil mill effluent
The effects of pH and temperature on the biodegradation of phenolics in palm oil mill effluent (POME) by a thermophilic fungus, Thermomyces lanuginosus TSP3-2, which produces polyphenol oxidase (PPO), were investigated. The fungus could degrade various phenolics in a wide pH range, 4.5-8.0. Its capa...
| Veröffentlicht in: | Environmental technology. - 1993. - 46(2025), 25 vom: 01. Okt., Seite 5174-5188 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Polymerisation agro-industrial wastewater depolymerisation fungal treatment industrial enzyme Palm Oil 5QUO05548Z Catechol Oxidase EC 1.10.3.1 mehr... |
| Zusammenfassung: | The effects of pH and temperature on the biodegradation of phenolics in palm oil mill effluent (POME) by a thermophilic fungus, Thermomyces lanuginosus TSP3-2, which produces polyphenol oxidase (PPO), were investigated. The fungus could degrade various phenolics in a wide pH range, 4.5-8.0. Its capability to remove individual phenolics such as phenol (8%-79%), ferulic acid (16%-28%), 4-hydroxybenzoic acid (30%-90%), protocatechuic acid (7%-100%), and gallic acid (15%-33%) was likely enhanced at neutral and alkaline pH levels. At these pH levels, the PPO activity was 91.7 and 70.8 U/L, respectively, which was twice as high as that at pH 4.5 (37.5 U/L) and pH 5.5 (38.9 U/L). Groups of phenolics were affected differently based on their chemical structure and initial concentration. With fungi, the phenolics underwent partial depolymerisation (biodegradation) and polymerisation at all tested pH levels. However, the polymerisation degree was lower than that without fungi. This transformation reaction was time-dependent in neutral and alkaline POME. In addition, a temperature between 60 and 70°C slightly improved the biodegradation of most of the phenolics by 6%-15%. At all tested temperatures, a much lower proportion of highly polymerised products were produced with fungi than without fungi. During POME treatment, the fungus also produced valuable byproducts, such as xylanase and fungal biomass protein, which are useful in numerous industries. As a result of these characteristics, this thermophilic fungus can be used for the treatment and valorisation of POME |
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| Beschreibung: | Date Completed 22.10.2025 Date Revised 22.10.2025 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1479-487X |
| DOI: | 10.1080/09593330.2025.2530032 |