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Enhancement of Micropollutant Degradation at the Outlet of Small Wastewater Treatment Plants

The aim of this work was to evaluate low-cost and easy-to-operate engineering solutions that can be added as a polishing step to small wastewater treatment plants to reduce the micropollutant load to water bodies. The proposed design combines a sand filter/constructed wetland with additional and mor...

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Autores principales: Rossi, Luca, Queloz, Pierre, Brovelli, Alessandro, Margot, Jonas, Barry, D. A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3590130/
https://www.ncbi.nlm.nih.gov/pubmed/23484055
http://dx.doi.org/10.1371/journal.pone.0058864
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author Rossi, Luca
Queloz, Pierre
Brovelli, Alessandro
Margot, Jonas
Barry, D. A.
author_facet Rossi, Luca
Queloz, Pierre
Brovelli, Alessandro
Margot, Jonas
Barry, D. A.
author_sort Rossi, Luca
collection PubMed
description The aim of this work was to evaluate low-cost and easy-to-operate engineering solutions that can be added as a polishing step to small wastewater treatment plants to reduce the micropollutant load to water bodies. The proposed design combines a sand filter/constructed wetland with additional and more advanced treatment technologies (UV degradation, enhanced adsorption to the solid phase, e.g., an engineered substrate) to increase the elimination of recalcitrant compounds. The removal of five micropollutants with different physico-chemical characteristics (three pharmaceuticals: diclofenac, carbamazepine, sulfamethoxazole, one pesticide: mecoprop, and one corrosion inhibitor: benzotriazole) was studied to evaluate the feasibility of the proposed system. Separate batch experiments were conducted to assess the removal efficiency of UV degradation and adsorption. The efficiency of each individual process was substance-specific. No process was effective on all the compounds tested, although elimination rates over 80% using light expanded clay aggregate (an engineered material) were observed. A laboratory-scale flow-through setup was used to evaluate interactions when removal processes were combined. Four of the studied compounds were partially eliminated, with poor removal of the fifth (benzotriazole). The energy requirements for a field-scale installation were estimated to be the same order of magnitude as those of ozonation and powdered activated carbon treatments.
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spelling pubmed-35901302013-03-12 Enhancement of Micropollutant Degradation at the Outlet of Small Wastewater Treatment Plants Rossi, Luca Queloz, Pierre Brovelli, Alessandro Margot, Jonas Barry, D. A. PLoS One Research Article The aim of this work was to evaluate low-cost and easy-to-operate engineering solutions that can be added as a polishing step to small wastewater treatment plants to reduce the micropollutant load to water bodies. The proposed design combines a sand filter/constructed wetland with additional and more advanced treatment technologies (UV degradation, enhanced adsorption to the solid phase, e.g., an engineered substrate) to increase the elimination of recalcitrant compounds. The removal of five micropollutants with different physico-chemical characteristics (three pharmaceuticals: diclofenac, carbamazepine, sulfamethoxazole, one pesticide: mecoprop, and one corrosion inhibitor: benzotriazole) was studied to evaluate the feasibility of the proposed system. Separate batch experiments were conducted to assess the removal efficiency of UV degradation and adsorption. The efficiency of each individual process was substance-specific. No process was effective on all the compounds tested, although elimination rates over 80% using light expanded clay aggregate (an engineered material) were observed. A laboratory-scale flow-through setup was used to evaluate interactions when removal processes were combined. Four of the studied compounds were partially eliminated, with poor removal of the fifth (benzotriazole). The energy requirements for a field-scale installation were estimated to be the same order of magnitude as those of ozonation and powdered activated carbon treatments. Public Library of Science 2013-03-06 /pmc/articles/PMC3590130/ /pubmed/23484055 http://dx.doi.org/10.1371/journal.pone.0058864 Text en © 2013 Rossi et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Rossi, Luca
Queloz, Pierre
Brovelli, Alessandro
Margot, Jonas
Barry, D. A.
Enhancement of Micropollutant Degradation at the Outlet of Small Wastewater Treatment Plants
title Enhancement of Micropollutant Degradation at the Outlet of Small Wastewater Treatment Plants
title_full Enhancement of Micropollutant Degradation at the Outlet of Small Wastewater Treatment Plants
title_fullStr Enhancement of Micropollutant Degradation at the Outlet of Small Wastewater Treatment Plants
title_full_unstemmed Enhancement of Micropollutant Degradation at the Outlet of Small Wastewater Treatment Plants
title_short Enhancement of Micropollutant Degradation at the Outlet of Small Wastewater Treatment Plants
title_sort enhancement of micropollutant degradation at the outlet of small wastewater treatment plants
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3590130/
https://www.ncbi.nlm.nih.gov/pubmed/23484055
http://dx.doi.org/10.1371/journal.pone.0058864
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