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Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis
The development of efficient and low-cost wastewater treatment processes remains an important challenge. A microaerobic up-flow oxidation ditch (UOD) with micro-electrolysis by waterfall aeration was designed for treating real municipal wastewater. The effects of influential factors such as up-flow...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8633808/ https://www.ncbi.nlm.nih.gov/pubmed/34966546 http://dx.doi.org/10.1098/rsos.201887 |
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author | Zhao, Zhen-dong Lin, Qiang Zhou, Yang Feng, Yu-hong Huang, Qi-mei Wang, Xiang-hui |
author_facet | Zhao, Zhen-dong Lin, Qiang Zhou, Yang Feng, Yu-hong Huang, Qi-mei Wang, Xiang-hui |
author_sort | Zhao, Zhen-dong |
collection | PubMed |
description | The development of efficient and low-cost wastewater treatment processes remains an important challenge. A microaerobic up-flow oxidation ditch (UOD) with micro-electrolysis by waterfall aeration was designed for treating real municipal wastewater. The effects of influential factors such as up-flow rate, waterfall height, reflux ratio, number of stages and iron dosing on pollutant removal were fully investigated, and the optimum conditions were obtained. The elimination efficiencies of chemical oxygen demand (COD), ammonia nitrogen (NH(4)(+)-N), total nitrogen (TN) and total phosphorus (TP) reached up to 84.33 ± 2.48%, 99.91 ± 0.09%, 93.63 ± 0.60% and 89.27 ± 1.40%, respectively, while the effluent concentrations of COD, NH(4)(+)-N, TN and TP were 20.67 ± 2.85, 0.02 ± 0.02, 1.39 ± 0.09 and 0.27 ± 0.02 mg l(−1), respectively. Phosphorous removal was achieved by iron–carbon micro-electrolysis to form an insoluble ferric phosphate precipitate. The microbial community structure indicated that carbon and nitrogen were removed via multiple mechanisms, possibly including nitrification, partial nitrification, denitrification and anammox in the UOD. |
format | Online Article Text |
id | pubmed-8633808 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-86338082021-12-28 Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis Zhao, Zhen-dong Lin, Qiang Zhou, Yang Feng, Yu-hong Huang, Qi-mei Wang, Xiang-hui R Soc Open Sci Chemistry The development of efficient and low-cost wastewater treatment processes remains an important challenge. A microaerobic up-flow oxidation ditch (UOD) with micro-electrolysis by waterfall aeration was designed for treating real municipal wastewater. The effects of influential factors such as up-flow rate, waterfall height, reflux ratio, number of stages and iron dosing on pollutant removal were fully investigated, and the optimum conditions were obtained. The elimination efficiencies of chemical oxygen demand (COD), ammonia nitrogen (NH(4)(+)-N), total nitrogen (TN) and total phosphorus (TP) reached up to 84.33 ± 2.48%, 99.91 ± 0.09%, 93.63 ± 0.60% and 89.27 ± 1.40%, respectively, while the effluent concentrations of COD, NH(4)(+)-N, TN and TP were 20.67 ± 2.85, 0.02 ± 0.02, 1.39 ± 0.09 and 0.27 ± 0.02 mg l(−1), respectively. Phosphorous removal was achieved by iron–carbon micro-electrolysis to form an insoluble ferric phosphate precipitate. The microbial community structure indicated that carbon and nitrogen were removed via multiple mechanisms, possibly including nitrification, partial nitrification, denitrification and anammox in the UOD. The Royal Society 2021-12-01 /pmc/articles/PMC8633808/ /pubmed/34966546 http://dx.doi.org/10.1098/rsos.201887 Text en © 2021 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Chemistry Zhao, Zhen-dong Lin, Qiang Zhou, Yang Feng, Yu-hong Huang, Qi-mei Wang, Xiang-hui Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis |
title | Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis |
title_full | Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis |
title_fullStr | Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis |
title_full_unstemmed | Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis |
title_short | Pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis |
title_sort | pollutant removal from municipal sewage by a microaerobic up-flow oxidation ditch coupled with micro-electrolysis |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8633808/ https://www.ncbi.nlm.nih.gov/pubmed/34966546 http://dx.doi.org/10.1098/rsos.201887 |
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