Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Arsenic metabolism in technical biogas plants : possible consequences for resident microbiota and downstream units

Title data

Weithmann, Nicolas ; Mlinar, Stanislava ; Hilbrig, Frank ; Bachmaf, Samar ; Arndt, Julia ; Planer-Friedrich, Britta ; Weig, Alfons ; Freitag, Ruth:
Arsenic metabolism in technical biogas plants : possible consequences for resident microbiota and downstream units.
In: AMB Express. Vol. 9 (2019) . - No. 190.
ISSN 2191-0855
DOI: https://doi.org/10.1186/s13568-019-0902-6

Abstract in another language

The metal(loid) and in particular the Arsenic (As) burden of thirteen agricultural biogas plants and two sewage sludge digesters were investigated together with the corresponding microbial consortia. The latter were characterized by ARISA (automated ribosomal intergenetic spacer analysis) and next generation sequencing. The consortia were found to cluster according to digester type rather than substrate or metal(loid) composition. For selected plants, individual As species in the liquid and gaseous phases were quantified, showing that the microorganisms actively metabolize and thereby remove the As from their environment via the formation of (methylated) volatile species. The As metabolites showed some dependency on the microbial consortia, while there was no statistical correlation with the substrate mix. Finally, slurry from one agricultural biogas plant and one sewage sludge digester was transferred into laboratory scale reactors (“satellite reactors”) and the response to a defined addition of As (30 and 60 µM sodium arsenite) was studied. The results corroborate the hypothesis of a rapid conversion of dissolved As species into volatile ones. Methanogenesis was reduced during that time, while there was no discernable toxic effect on the microbial population. However, the utilization of the produced biogas as replacement for natural gas, e.g. as fuel, may be problematic, as catalysts and machinery are known to suffer from prolonged exposure even to low As concentrations.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Anaerobic; Archaea; Biogas; Metal(loid); Methanogenesis; Sewage sludge
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group > Professor Environmental Geochemistry - Univ.-Prof. Dr. Britta Planer-Friedrich
Faculties > Faculty of Engineering Science > Chair Process Biotechnology
Faculties > Faculty of Engineering Science > Chair Process Biotechnology > Chair Process Biotechnology - Univ.-Prof. Dr. Ruth Freitag
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 570 Life sciences, biology
Date Deposited: 29 Nov 2019 09:36
Last Modified: 29 Nov 2019 09:36
URI: https://eref.uni-bayreuth.de/id/eprint/53433