Hydrogen as a Co-electron Donor for Chain Elongation With Complex Communities.

ABSTRACT: Electron donor scarcity is seen as one of the major issues limiting economic production of medium-chain carboxylates from waste streams. Previous studies suggest that co-fermentation of hydrogen in microbial communities that realize chain elongation relieves this limitation. To better understand how hydrogen co-feeding can support chain elongation, we enriched three different microbial communities from anaerobic reactors (A, B, and C with ascending levels of diversity) for their ability to produce medium-chain carboxylates from conventional electron donors (lactate or ethanol) or from hydrogen. In the presence of abundant acetate and CO₂, the effects of different abiotic parameters (pH values in acidic to neutral range, initial acetate concentration, and presence of chemical met

SUBMITTER: Baleeiro FCF 

PROVIDER: S-EPMC8059637 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature