Phenyl Acid Induced Inhibition of Methanogenesis in CO₂ Reducing Organisms.

ABSTRACT: During anaerobic digestion (AD) of lignocellulose- and protein-rich substrates known to contain a high load of aromatic compounds, various undesired intermediates can arise, which can accumulate and cause serious disturbances during the cascade-like AD process. The phenyl acids phenyl-acetic-(PAA), phenyl-propionic-(PPA), and phenyl-butyric acid (PBA) are such intermediates suspected to negatively affect the microbial community, resulting in a decreased biogas yield. In the present study, the impact of PAA, PPA, and PBA on the metabolism of CO₂ reducing methanogens was investigated. The mesophilically incubated Methanococcus vannielii and Methanospirillum hungatei showed a higher sensitivity than the thermophilic Methanoculleus thermophilus, Methanothermobacter thermoautotrophic

SUBMITTER: Wunderer M 

PROVIDER: S-EPMC11903324 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature