Bioaugmentation Mitigates the Impact of Estrogen on Coliform-Grazing Protozoa in Slow Sand Filters

Haig, Sarah Jane, Gauchotte-Lindsay, Caroline, Collins, Gavin and Quince, Christopher (2016) Bioaugmentation Mitigates the Impact of Estrogen on Coliform-Grazing Protozoa in Slow Sand Filters. Environmental Science and Technology, 50 (6). pp. 3101-3110. ISSN 0013-936X

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Abstract

Exposure to endocrine-disrupting chemicals (EDCs), such as estrogens, is a growing issue for human and animal health as they have been shown to cause reproductive and developmental abnormalities in wildlife and plants and have been linked to male infertility disorders in humans. Intensive farming and weather events, such as storms, flash flooding, and landslides, contribute estrogen to waterways used to supply drinking water. This paper explores the impact of estrogen exposure on the performance of slow sand filters (SSFs) used for water treatment. The feasibility and efficacy of SSF bioaugmentation with estrogen-degrading bacteria was also investigated, to determine whether removal of natural estrogens (estrone, estradiol, and estriol) and overall SSF performance for drinking water treatment could be improved. Strains for SSF augmentation were isolated from full-scale, municipal SSFs so as to optimize survival in the laboratory-scale SSFs used. Concentrations of the natural estrogens, determined by gas chromatography coupled with mass spectrometry (GC-MS), revealed augmented SSFs reduced the overall estrogenic potency of the supplied water by 25% on average and removed significantly more estrone and estradiol than nonaugmented filters. A negative correlation was found between coliform removal and estrogen concentration in nonaugmented filters. This was due to the toxic inhibition of protozoa, indicating that high estrogen concentrations can have functional implications for SSFs (such as impairing coliform removal). Consequently, we suggest that high estrogen concentrations could impact significantly on water quality production and, in particular, on pathogen removal in biological water filters.

Item Type: Article
Additional Information: Funding Information: S.H. was supported by a Lord Kelvin/Adam Smith Research scholarship (44784) from the University of Glasgow. G.C. is supported by a European Research Council award (3CBIOTECH; 261330). C.Q. was supported by an EPSRC Career Acceleration Fellowship award (EP/H003851/1)C and an MRC fellowship MR/M50161X/1 as part of the CLoud Infrastructure for Microbial Genomics (CLIMB) consortium -MR/L015080/1. This work was supported by an EPSRC award (EP/J00538X/1 - A Global Solution to Transforming Waste). A special thanks to the GU68 Engineers Trust and Ian Scouller, without whom this work would not have been possible. Publisher Copyright: © 2016 American Chemical Society.
Uncontrolled Keywords: chemistry(all),environmental chemistry,sdg 3 - good health and well-being ,/dk/atira/pure/subjectarea/asjc/1600
Faculty \ School: Faculty of Science > School of Biological Sciences
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Depositing User: LivePure Connector
Date Deposited: 09 Sep 2022 09:31
Last Modified: 29 Sep 2022 18:32
URI: https://ueaeprints.uea.ac.uk/id/eprint/88015
DOI: 10.1021/acs.est.5b05027

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