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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...

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Autores principales: Zhao, Zhen-dong, Lin, Qiang, Zhou, Yang, Feng, Yu-hong, Huang, Qi-mei, Wang, Xiang-hui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society 2021
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.
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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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