Assessment of the in situ biomethanation potential of a deep aquifer used for natural gas storage - Université de Pau et des Pays de l'Adour Accéder directement au contenu
Article Dans Une Revue FEMS Microbiology Ecology Année : 2024

Assessment of the in situ biomethanation potential of a deep aquifer used for natural gas storage

Résumé

The dihydrogen (H2) sector is undergoing development and will require massive storage solutions. To minimize costs, the conversion of underground geological storage sites, such as deep aquifers, used for natural gas storage into future underground hydrogen storage sites is the favored scenario. However, these sites contain microorganisms capable of consuming H2, mainly sulfate reducers and methanogens. Methanogenesis is, therefore expected but its intensity must be evaluated. Here, in a deep aquifer used for underground geological storage, 17 sites were sampled, with low sulfate concentrations ranging from 21.9 to 197.8 µM and a slow renewal of formation water. H2-selected communities mainly were composed of the families Methanobacteriaceae and Methanothermobacteriaceae and the genera Desulfovibrio, Thermodesulfovibrio, and Desulforamulus. Experiments were done under different conditions, and sulfate reduction, as well as methanogenesis, were demonstrated in the presence of a H2 or H2/CO2 (80/20) gas phase, with or without calcite/site rock. These metabolisms led to an increase in pH up to 10.2 under certain conditions (without CO2). The results suggest competition for CO2 between lithoautotrophs and carbonate mineral precipitation, which could limit microbial H2 consumption.
Fichier principal
Vignette du fichier
fiae066.pdf (1.77 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-04589662 , version 1 (27-05-2024)

Identifiants

Citer

Magali Ranchou-Peyruse, Marion Guignard, Pierre Chiquet, Guilhem Caumette, Pierre Cézac, et al.. Assessment of the in situ biomethanation potential of a deep aquifer used for natural gas storage. FEMS Microbiology Ecology, 2024, 100 (6), ⟨10.1093/femsec/fiae066⟩. ⟨hal-04589662⟩
26 Consultations
7 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More