Magnetite accelerates syntrophic acetate oxidation in methanogenic systems with high ammonia concentrations.

ABSTRACT: Ammonia accumulation is a major inhibitory substance causing anaerobic digestion upset and failure in CH₄ production. At high ammonia levels, CH₄ production through syntrophic acetate oxidization (SAO) pathways is more tolerant to ammonia toxicity than the acetoclastic methanogenesis pathway, but the low CH₄ production rate through SAO constitutes the main reason for the low efficiency of energy recovery in anaerobic digesters treating ammonia-rich substrates. In this study, we showed that acetate fermentation to CH₄ and CO₂ occurred through SAO pathway in the anaerobic reactors containing a high ammonia concentration (5.0 g l^-1 NH₄⁺ -N), and the magnetite nanoparticles supplementation increased the CH<

SUBMITTER: Zhuang L 

PROVIDER: S-EPMC6011935 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature