Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1016/j.ese.2023.100307
Licence creative commons licence
Title (Primary) Microbial electricity-driven anaerobic phenol degradation in bioelectrochemical systems
Author Dai, S.; Harnisch, F. ORCID logo ; Chávez Morejón, M.; Keller, N.S.; Korth, B. ORCID logo ; Vogt, C.
Source Titel Environmental Science and Ecotechnology
Year 2024
Volume 17
Page From art. 100307
Language englisch
Topic T7 Bioeconomy
Keywords Microbial electroremediation; Geobacter; Extracellular electron transfer; Anaerobic phenol degradation; Microbial syntrophy
Abstract Microbial electrochemical technologies have been extensively employed for phenol removal. Yet, previous research has yielded inconsistent results, leaving uncertainties regarding the feasibility of phenol degradation under strictly anaerobic conditions using anodes as sole terminal electron acceptors. In this study, we employed high-performance liquid chromatography and gas chromatography-mass spectrometry to investigate the anaerobic phenol degradation pathway. Our findings provide robust evidence for the purely anaerobic degradation of phenol, as we identified benzoic acid, 4-hydroxy-benzoic acid, glutaric acid, and other metabolites of this pathway. Notably, no typical intermediates of the aerobic phenol degradation pathway were detected. One-chamber reactors (+0.4 V vs. SHE) exhibited a phenol removal rate of 3.5 ± 0.2 mg L−1 d−1, while two-chamber reactors showed 3.6 ± 0.1 and 2.6 ± 0.9 mg L−1 d−1 at anode potentials of +0.4 and + 0.2 V, respectively. Our results also suggest that the reactor configuration certainly influenced the microbial community, presumably leading to different ratios of phenol consumers and microorganisms feeding on degradation products.
Persistent UFZ Identifier
Dai, S., Harnisch, F., Chávez Morejón, M., Keller, N.S., Korth, B., Vogt, C. (2024):
Microbial electricity-driven anaerobic phenol degradation in bioelectrochemical systems
Environ. Sci. Ecotechnol. 17 , art. 100307 10.1016/j.ese.2023.100307