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Tytuł:
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The core microbiome is responsible for volatile silicon and organic compounds degradation during anoxic lab scale biotrickling filter performance.
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Autorzy:
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Boada E; Molecular Microbial Ecology Group (gEMM), Institute of Aquatic Ecology, Faculty of Sciences, University of Girona, 17003 Girona, Spain. Electronic address: .
Santos-Clotas E; LEQUIA, Institute of the Environment, University of Girona, 17003 Girona, Spain. Electronic address: .
Cabrera-Codony A; LEQUIA, Institute of the Environment, University of Girona, 17003 Girona, Spain. Electronic address: .
Martín MJ; LEQUIA, Institute of the Environment, University of Girona, 17003 Girona, Spain. Electronic address: .
Bañeras L; Molecular Microbial Ecology Group (gEMM), Institute of Aquatic Ecology, Faculty of Sciences, University of Girona, 17003 Girona, Spain. Electronic address: .
Gich F; Molecular Microbial Ecology Group (gEMM), Institute of Aquatic Ecology, Faculty of Sciences, University of Girona, 17003 Girona, Spain. Electronic address: .
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Źródło:
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The Science of the total environment [Sci Total Environ] 2021 Dec 01; Vol. 798, pp. 149162. Date of Electronic Publication: 2021 Jul 21.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: Amsterdam, Elsevier.
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MeSH Terms:
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Microbiota*
Volatile Organic Compounds*
Biodegradation, Environmental ; Bioreactors ; Filtration ; RNA, Ribosomal, 16S/genetics ; Silicon
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Contributed Indexing:
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Keywords: Bacterial community; Biogas upgrading; Biotrickling filter; Siloxane; Volatile organic compounds
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Substance Nomenclature:
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0 (RNA, Ribosomal, 16S)
0 (Volatile Organic Compounds)
Z4152N8IUI (Silicon)
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Entry Date(s):
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Date Created: 20210801 Date Completed: 20210930 Latest Revision: 20210930
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Update Code:
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20240105
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DOI:
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10.1016/j.scitotenv.2021.149162
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PMID:
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34333428
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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.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
