Performance and microbial community variations of anaerobic digesters under increasing tetracycline concentrations.

ABSTRACT: The impact of different concentrations of tetracycline on the performance of anaerobic treatment was evaluated. Results revealed that for all of the tested tetracycline concentrations, no major sustained impact on methane production was observed. Instead, a significant increase in propionic acid was observed in the reactor subjected to the highest concentration of tetracycline (20 mg/L). Microbial community analyses suggest that an alternative methanogenic pathway, specifically that of methanol-utilizing methanogens, may be important for ensuring the stability of methane production in the presence of high tetracycline concentrations. In addition, the accumulation of propionate was due to an increase in volatile fatty acids (VFA)-producing bacteria coupled with a reduction in propionate uti

SUBMITTER: Xiong Y 

PROVIDER: S-EPMC5486833 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature