Increased replication of dissimilatory nitrate-reducing bacteria leads to decreased anammox bioreactor performance.

ABSTRACT:

Background

Anaerobic ammonium oxidation (anammox) is a biological process employed to remove reactive nitrogen from wastewater. While a substantial body of literature describes the performance of anammox bioreactors under various operational conditions and perturbations, few studies have resolved the metabolic roles of their core microbial community members.

Results

Here, we used metagenomics to study the microbial community of a laboratory-scale anammox bioreactor from inoculation, through a performance destabilization event, to robust steady-state performance. Metabolic analyses revealed that nutrient acquisition from the environment is selected for in the anammox community. Dissimilatory nitrate reduction to ammonium (DNRA) was the primary nitrogen removal pathway that co

SUBMITTER: Keren R 

PROVIDER: S-EPMC6982389 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature