Effect of micro-aeration on syntrophic and methanogenic activity in anaerobic sludge.

ABSTRACT: Micro-aeration was shown to improve anaerobic digestion (AD) processes, although oxygen is known to inhibit obligate anaerobes, such as syntrophic communities of bacteria and methanogens. The effect of micro-aeration on the activity and microbial interaction in syntrophic communities, as well as on the potential establishment of synergetic relationships with facultative anaerobic bacteria (FAB) or aerobic bacteria (AB), was investigated. Anaerobic sludge was incubated with ethanol and increasing oxygen concentrations (0-5% in the headspace). Assays with acetate or H₂/CO₂ (direct substrates for methanogens) were also performed. When compared with the controls (0% O₂), oxygen significantly decreased substrate consumption and initial methane production rate (M

SUBMITTER: Morais BP 

PROVIDER: S-EPMC10837232 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature