Hydrogenotrophic methanogens are the key for a successful bioaugmentation to alleviate ammonia inhibition in thermophilic anaerobic digesters.

Ammonia Anaerobiosis Bioreactors Euryarchaeota Methane
Ammonia-tolerant consortium Biogas Methanoculleus thermophilus Methanosarcina thermophila Microbial community

Journal

Bioresource technology
ISSN: 1873-2976
Titre abrégé: Bioresour Technol
Pays: England
ID NLM: 9889523

Informations de publication

Date de publication:
Dec 2019
Historique:
received: 25 05 2019
revised: 20 08 2019
accepted: 24 08 2019
pubmed: 7 9 2019
medline: 11 10 2019
entrez: 7 9 2019
Statut: ppublish

Résumé

Bioaugmentation to alleviate ammonia inhibition under thermophilic anaerobic digestion has never been reported, as well as the working mechanism that allows a fast and successful bioaugmentation. Thus two bioaugmentation inocula (an enriched culture, and a mixed culture composed 50/50 by Methanoculleus thermophilus and the enriched culture) on the recovery of ammonia-inhibited thermophilic continuous reactors was assessed. The results showed that bioaugmentation improved methane yield by 11-13% and decreased the volatile fatty acids (VFA) by 45-52% compared to the control reactor (abiotic augmentation). Moreover, the importance of hydrogenotrophic methanogens to a fast and successful bioaugmentation was recognized. Specifically, the instant hydrogen partial pressure reduction by the bioaugmented hydrogenotroph created thermodynamically favourable conditions for the acetate oxidation process and consequently, the catabolism of other VFA. High-throughput sequencing results strengthened this explanation by showing that the bioaugmented M. thermophilus stimulated the growth of syntrophic acetate oxidising bacterium Thermacetogenium phaeum, immediately after bioaugmentation.

Identifiants

DOI: 10.1016/j.biortech.2019.122070 PMID: 31491648
pubmed: 31491648
pii: S0960-8524(19)31300-8
doi: 10.1016/j.biortech.2019.122070
pii:
doi:

Substances chimiques

Ammonia 7664-41-7
Methane OP0UW79H66

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

122070

Informations de copyright

Copyright © 2019 Elsevier Ltd. All rights reserved.

Auteurs

Hailin Tian (H)

Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet Bygning 115, 2800 Kgs. Lyngby, Denmark; Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower, Singapore 138602, Singapore.

Miao Yan (M)

Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet Bygning 115, 2800 Kgs. Lyngby, Denmark.

Laura Treu (L)

Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet Bygning 115, 2800 Kgs. Lyngby, Denmark; Department of Biology, University of Padua, 35131 Padua, Italy.

Irini Angelidaki (I)

Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet Bygning 115, 2800 Kgs. Lyngby, Denmark.

Ioannis A Fotidis (IA)

Department of Environmental Engineering, Technical University of Denmark, Bygningstorvet Bygning 115, 2800 Kgs. Lyngby, Denmark. Electronic address: ioanf@env.dtu.dk.

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Classifications MeSH

questionsmedicales.fr › Produits chimiques inorganiques › Composés de l'azote › Ammoniac › Hydrogenotrophic methanogens are the key for a...
questionsmedicales.fr › Métabolisme › Anaérobiose › Hydrogenotrophic methanogens are the key for a...
questionsmedicales.fr › Technologie, industrie et agriculture › Technologie › Biotechnologie › Bioréacteurs › Hydrogenotrophic methanogens are the key for a...
questionsmedicales.fr › Archéobactéries › Euryarchaeota › Hydrogenotrophic methanogens are the key for a...
questionsmedicales.fr › Composés chimiques organiques › Hydrocarbures › Hydrocarbures acycliques › Alcanes › Méthane › Hydrogenotrophic methanogens are the key for a...