Wastewater microorganisms impact the micropollutant biotransformation potential of natural stream biofilms - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Access content directly
Journal Articles Water Research Year : 2022

Wastewater microorganisms impact the micropollutant biotransformation potential of natural stream biofilms

Abstract

Biotransformation is the most important process removing manmade chemicals from the environment, yet mechanisms governing this essential ecosystem function are underexplored. To understand these mechanisms, we conducted experiments in flow-through systems, by colonizing stream biofilms under different conditions of mixing river water with treated (and ultrafiltered) wastewater. We performed biotransformation experiments with those biofilms, using a set of 75 micropollutants, and could disentangle potential mechanisms determining the biotransformation potential of stream biofilms. We showed that the increased biotransformation potential downstream of wastewater treatment plants that we observed for specific micropollutants contained in household wastewaters (downstream effect) is caused by microorganisms released with the treated effluent, rather than by the in-stream exposure to those micropollutants. Complementary data from 16S rRNA amplicon-sequencing revealed 146 amplicon sequence variants (ASVs) that followed the observed biotransformation patterns. Our results align with findings for community tolerance, and provide clear experimental evidence that microorganisms released with treated wastewater integrate into downstream biofilms and impact crucial ecosystem functions.

Dates and versions

hal-04165788 , version 1 (19-07-2023)

Identifiers

Cite

Werner Desiante, Louis Carles, Simon Wullschleger, Adriano Joss, Christian Stamm, et al.. Wastewater microorganisms impact the micropollutant biotransformation potential of natural stream biofilms. Water Research, 2022, 217, pp.118413. ⟨10.1016/j.watres.2022.118413⟩. ⟨hal-04165788⟩

Collections

INRAE
1 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More