Roturi®-based ozonation principle for the simultaneous reduction of ARG and trace substances: PAPER & PRESENTATION
Pöschl, U., up2e!, Germany
(free)
Abstract
Oxidation and adsorption processes or a combination of both have proven to be suitable for the reduction of trace substances. However, previous research projects have so far only paid little attention to the performance or optimisation of these processes for a combined reduction of trace substances, antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARG).
The contamination of water bodies with trace substances leads to the generation of antimicrobial resistance (AMR) in bacteria, which has gained increasing attention in recent years. Wastewater treatment plants, being the interface between urban areas and the environment are a possible entry pathway and are therefore increasingly being researched and investigated. To achieve a far-reaching reduction of micropollutants as well as ARB/ARG in the discharge of wastewater treatment plants, innovative technologies are needed that can be used for the elimination of both.
Laboratory tests in this study showed that at ozone concentrations of approximately 0.6 gO3/gDOC, the number of ARB decreased significantly. Ozone treatment also had a strong impact on the composition of the resistome, although the effect varied depending on the specific ARG. Furthermore, it was demonstrated that resistant bacteria became more susceptible to antibiotics after exposure to ozone.
