Microbial Resource Management for Ex Situ Biomethanation of Hydrogen at Alkaline pH.

ABSTRACT: Biomethanation is a promising solution to convert H₂ (produced from surplus electricity) and CO₂ to CH₄ by using hydrogenotrophic methanogens. In ex situ biomethanation with mixed cultures, homoacetogens and methanogens compete for H₂/CO₂. We enriched a hydrogenotrophic microbiota on CO₂ and H₂ as sole carbon and energy sources, respectively, to investigate these competing reactions. The microbial community structure and dynamics of bacteria and methanogenic archaea were evaluated through 16S rRNA and mcrA gene amplicon sequencing, respectively. Hydrogenotrophic methanogens and homoacetogens were enriched, as acetate was concomitantly produced alongside CH₄. By controlling the media composition,

SUBMITTER: Logrono W 

PROVIDER: S-EPMC7232305 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature