Exploring Microbiological Dynamics in a Salt Cavern for Potential Hydrogen Storage Use.

Hydrogen storage in salt caverns is important for supporting the energy transition. However, there is limited knowledge about microbial communities within these caverns and associated risks of hydrogen loss. In this study we characterised a salt-saturated brine from a salt cavern and found a high sulphate content (4.

Microbial hydrogen consumption leads to a significant pH increase under high-saline-conditions: implications for hydrogen storage in salt caverns.

Salt caverns have been successfully used for natural gas storage globally since the 1940s and are now under consideration for hydrogen (H) storage, which is needed in large quantities to decarbonize the economy to finally reach a net zero by 2050. Salt caverns are not sterile and H is a ubiquitous electron donor for microorganisms. This could entail that the injected H will be microbially consumed, leading to a volumetric loss and potential production of toxic HS.

Modeling of heavy nitrate corrosion in anaerobe aquifer injection water biofilm: a case study in a flow rig.

Heavy carbon steel corrosion developed during nitrate mitigation of a flow rig connected to a water injection pipeline flowing anaerobe saline aquifer water. Genera-specific QPCR primers quantified 74% of the microbial biofilm community, and further 87% of the community of the nonamended parallel rig. The nonamended biofilm hosted 6.

Biogenic methane production in formation waters from a large gas field in the North Sea.

Methanogenesis was investigated in formation waters from a North Sea oil rimmed gas accumulation containing biodegraded oil, which has not been subject to seawater injection. Activity and growth of hydrogenotrophic methanogens was measured but acetoclastic methanogenesis was not detected. Hydrogenotrophic methanogens showed activity between 40 and 80 degrees C with a temperature optimum (ca.