Variations in methane emissions from dairy cows: associations with rumen microbial synergy and metabolic pathway divergence [PDF]
Journal of Animal Science and BiotechnologyBackground Methane (CH4) is a metabolic by-product of rumen microbial fermentation, contributing significantly to global warming and dietary energy loss. Elucidating the mechanisms underlying natural variation in rumen methanogenesis is essential for the
Peng Jia +5 more
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Active methylotrophic methanogenesis by a microbial consortium enriched from a terrestrial meteorite impact crater [PDF]
mBioMicrobial methane generation (methanogenesis) is an important metabolic process in the terrestrial deep biosphere and is an analog to early Earth as it is proposed to be one of the most ancient metabolisms on Earth.
Femke van Dam +9 more
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Acetoclastic versus hydrogenotrophic methanogenesis: defining how pH and alkalinity shape acetate metabolism in a haloalkaliphilic methanogenic community for biomethane production [PDF]
Applied Microbiology and BiotechnologyIn methanogenic communities, two main pathways drive methanogenesis: acetoclastic methanogenesis, which converts acetate into CH4 and CO2, and hydrogenotrophic methanogenesis, which reduces CO2 with H2 to CH4.
Beatriz C. Diniz +4 more
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Genus-specific remodeling of carbon and energy metabolism facilitates acetoclastic methanogenesis in Methanosarcina spp. and Methanothrix spp. [PDF]
Journal of BacteriologyMethanogenic archaea (methanogens) are microorganisms that obligately produce methane as a byproduct of their energy metabolism. While most methanogens grow on CO2+H2, isolates of the genera Methanosarcina and Methanothrix can use acetate as the sole ...
Blake E. Downing +3 more
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Coexistence of methanogenesis and sulfate reduction in a sulfate-adapted enrichment culture from an oil reservoir [PDF]
Applied and Environmental MicrobiologyOil reservoirs are complex ecosystems where microorganisms play a vital role in hydrocarbon degradation, mostly with methanogenesis as the terminal electron-accepting process. Especially in offshore oil reservoirs, sulfate-containing seawater is injected
Sebastian Beilig +5 more
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Thermodynamic method for analyzing and optimizing pretreatment/anaerobic digestion systems [PDF]
Biofuel Research Journal, 2023 This paper builds a quantitative thermodynamic model for the microbial hydrolysis process (MHP, which uses Caldicellulosiruptor bescii at 75°C for pre-digestion) for producing biogas from a 5-10% aqueous suspension of dairy manure (naturally buffered ...
Lee D. Hansen
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Microbial methanogenesis in the sulfate-reducing zone of sediments in the Eckernförde Bay, SW Baltic Sea [PDF]
Biogeosciences, 2018 Benthic microbial methanogenesis is a known source of methane in marine systems. In most sediments, the majority of methanogenesis is located below the sulfate-reducing zone, as sulfate reducers outcompete methanogens for the major substrates hydrogen
J. Maltby +10 more
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A variety of substrates for methanogenesis
Case Studies in Chemical and Environmental Engineering, 2023 The number of methanogenesis substrates known to date has increased more than six-fold since the late 80s, bringing to 152 the number of proven substrates for methanogenesis, plus 41 putative substrates predicted on the basis of ‘omic’ and biochemical ...
Marc Cozannet +2 more
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Frontiers in Microbiology, 2023 IntroductionAnaerobic oxidation of methane (AOM) is hypothesized to occur through reverse hydrogenotrophic methanogenesis in marine sediments because sulfate reducers pull hydrogen concentrations so low that reverse hydrogenotrophic methanogenesis is ...
Gage R. Coon +4 more
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Microbial methane formation in deep aquifers associated with the sediment burial history at a coastal site [PDF]
Biogeosciences, 2023 Elucidating the mechanisms underlying microbial methane formation in subsurface environments is essential to understanding the global carbon cycle. This study examined how microbial methane formation (i.e., methanogenesis) occurs in natural-gas-bearing ...
T. Katayama +3 more
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