Influence of redox condition and inoculum on micropollutant biodegradation by soil and activated sludge communities.

Autor: H R Branco R; Environmental Technology, Wageningen University & Research, 47, 6700 AA Wageningen, the Netherlands; Wetsus, European Centre of Excellence for Sustainable Water Technology, 1113, 8900 CC Leeuwarden, the Netherlands., Meulepas RJW; Wetsus, European Centre of Excellence for Sustainable Water Technology, 1113, 8900 CC Leeuwarden, the Netherlands., van Veelen HPJ; Wetsus, European Centre of Excellence for Sustainable Water Technology, 1113, 8900 CC Leeuwarden, the Netherlands., Rijnaarts HHM; Environmental Technology, Wageningen University & Research, 47, 6700 AA Wageningen, the Netherlands., Sutton NB; Environmental Technology, Wageningen University & Research, 47, 6700 AA Wageningen, the Netherlands. Electronic address: nora.sutton@wur.nl.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2023 Nov 01; Vol. 897, pp. 165233. Date of Electronic Publication: 2023 Jun 30.
DOI: 10.1016/j.scitotenv.2023.165233
Abstrakt: Micropollutant biodegradation is selected by the interplay among environmental conditions and microbial community composition. This study investigated how different electron acceptors, and different inocula with varying microbial diversity, pre-exposed to distinct redox conditions and micropollutants, affect micropollutant biodegradation. Four tested inocula comprised of agricultural soil (Soil), sediment from a ditch in an agricultural field (Ditch), activated sludge from a municipal WWTP (Mun AS), and activated sludge from an industrial WWTP (Ind AS). Removal of 16 micropollutants was investigated for each inoculum under aerobic, nitrate reducing, iron reducing, sulfate reducing, and methanogenic conditions. Micropollutant biodegradation was highest under aerobic conditions with removal of 12 micropollutants. Most micropollutants were biodegraded by Soil (n = 11) and Mun AS inocula (n = 10). A positive correlation was observed between inoculum community richness and the number of different micropollutants a microbial community initially degraded. The redox conditions to which a microbial community had been exposed appeared to positively affect micropollutant biodegradation performance more than pre-exposure to micropollutants. Additionally, depletion of the organic carbon present in the inocula resulted in lower micropollutant biodegradation and overall microbial activities, suggesting that i) an additional carbon source is needed to promote micropollutant biodegradation; and ii) overall microbial activity can be a good indirect indicator for micropollutant biodegradation activity. These results could help to develop novel micropollutant removal strategies.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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