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The core microbiome is responsible for volatile silicon and organic compounds degradation during anoxic lab scale biotrickling filter performance
- Source :
- Science of The Total Environment, 2021, vol. 798, art.núm.149162, Articles publicats (D-B), DUGiDocs – Universitat de Girona, instname, Science of the Total Environment
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Volatile silicon compounds present in the biogas of anaerobic digesters can cause severe problems in the energy recovery systems, inducing costly damages. Herein, the microbial community of a lab-scale biotrickling filter (BTF) was studied while testing its biodegradation capacity on octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5), in the presence of toluene, limonene and hexane. The reactor performance was tested at different empty bed residence times (EBRT) and packing materials. Community structure was analysed by bar-coded amplicon sequencing of the 16S rRNA gene. Microbial diversity and richness were higher in the inoculum and progressively decreased during BTF operation (Simpson's diversity index changing from 0.98–0.90 and Richness from 900 to 200 OTUs). Minimum diversity was found when reactor was operated at relatively low EBRT (7.3 min) using a multicomponent feed. The core community was composed of 36 OTUs (accounting for 55% of total sequences). Packing material played a key role in the community structure. Betaproteobacteriales were dominant in the presence of lava rock and were partially substituted by Corynebacteriales and Rhizobiales when activated carbon was added to the BTF. Despite these changes, a stable and resilient core microbiome was selected defining a set of potentially degrading bacteria for siloxane bioremoval as a complementary alternative to non-regenerative adsorption onto activated carbon This work was funded by MINECO – Spain (CTQ2014-53718R) co-funded by FEDER and University of Girona. E. B. thanks SENESCYT – Ecuador for her predoctoral grant. IEA and LEQUIA have been recognized as consolidated research groups by the Catalan Government (2017SGR-548 and 2017SGR-1552, respectively). E.S.C. thanks Universitat de Girona for his predoctoral grant (IFUdG-2015/51). The research leading to these results has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 712949 (TECNIOspring PLUS) and from the Agency for Business Competitiveness of the Government of Catalonia (A.Cabrera-Codony TECSPR16-1-0045) Open Access funding provided thanks to the CRUE-CSIC agreement with Elsevier
- Subjects :
- Silicon
Environmental Engineering
Activated carbon
Carbó activat
Biogas
Contaminants orgànics de l'aigua
Biodegradació
Octamethylcyclotetrasiloxane
Bioreactors
RNA, Ribosomal, 16S
Organic water pollutants
medicine
Environmental Chemistry
Aigua -- Depuració -- Filtració
Waste Management and Disposal
Volatile Organic Compounds
Chemistry
Microbiota
Biogàs
Biodegradation
Pulp and paper industry
Pollution
Anoxic waters
Filter (aquarium)
Water -- Purification -- Filtration
Biodegradation, Environmental
Microbial population biology
Degradation (geology)
Filtration
medicine.drug
Subjects
Details
- ISSN :
- 00489697
- Volume :
- 798
- Database :
- OpenAIRE
- Journal :
- Science of The Total Environment
- Accession number :
- edsair.doi.dedup.....51b89bb025980d6c9216bec93b7713d4