Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.3389/fmicb.2022.869474
Lizenz creative commons licence
Titel (primär) Electrochemical and microbial dissection of electrified biotrickling filters
Autor Korth, B.; Pous, N.; Hönig, R.; Haus, P.; Borim Corrêa, F.; Nunes da Rocha, U.; Puig, S.; Harnisch, F.
Journal / Serie Frontiers in Microbiology
Erscheinungsjahr 2022
Department UMB
Band/Volume 13
Seite von art. 869474
Sprache englisch
Topic T7 Bioeconomy
Keywords Microbial electrochemical technology; Biologic nitrogen removal; Denitrification; Fixed bed reactor; cyclic voltammetry; metagenomic sequencing
Abstract Electrified biotrickling filters represent sustainable microbial electrochemical technology for treating organic carbon-deficient ammonium-contaminated waters. However, information on the microbiome of the conductive granule bed cathode remained inexistent. For uncovering this black box and for identifying key process parameters, minimally invasive sampling units were introduced allowing the extraction of granules from different reactor layers during reactor operation. Sampled granules were analyzed using cyclic voltammetry and molecular-biological tools. Two main redox sites (−288±18 mV and −206±21 mV vs. SHE) related to bioelectrochemical denitrification were identified exhibiting high activity in a broad pH range (pH 6-10). A genome-centric analysis revealed a complex nitrogen food web and the presence of typical denitrifiers like Pseudomonas nitroreducens and Paracoccus versutus with none of these species being identified as electroactive microorganisms, so far. The results provide first insights into microbial structure-function-relationships within electrified biotrickling filters and underline robustness and application potential of bioelectrochemical denitrification for environmental remediation.
dauerhafte UFZ-Verlinkung
Korth, B., Pous, N., Hönig, R., Haus, P., Borim Corrêa, F., Nunes da Rocha, U., Puig, S., Harnisch, F. (2022):
Electrochemical and microbial dissection of electrified biotrickling filters
Front. Microbiol. 13 , art. 869474