Microbiome Structure and Function in Woodchip Bioreactors for Nitrate Removal in Agricultural Drainage Water.

ABSTRACT: Woodchip bioreactors are increasingly used to remove nitrate (NO₃ ^-) from agricultural drainage water in order to protect aquatic ecosystems from excess nitrogen. Nitrate removal in woodchip bioreactors is based on microbial processes, but the microbiomes and their role in bioreactor efficiency are generally poorly characterized. Using metagenomic analyses, we characterized the microbiomes from 3 full-scale bioreactors in Denmark, which had been operating for 4-7 years. The microbiomes were dominated by Proteobacteria and especially the genus Pseudomonas, which is consistent with heterotrophic denitrification as the main pathway of NO₃ ^- reduction. This was supported by functional gene analyses, showing the presence of the full suit

SUBMITTER: Jeglot A 

PROVIDER: S-EPMC8377596 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature