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Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR)
Sulfur-based carriers were examined to enhance the nitrogen removal efficiency in a mixed anoxic–anaerobic-membrane bioreactor system, in which sulfur from the carrier acts as an electron donor for the conversion of nitrate to nitrogen gas through the autotrophic denitrification process. A total nit...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6316607/ https://www.ncbi.nlm.nih.gov/pubmed/30469519 http://dx.doi.org/10.3390/membranes8040115 |
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author | Vo, Thi-Kim-Quyen Lee, Jeong-Jun Kang, Joon-Seok Park, Seogyeong Kim, Han-Seung |
author_facet | Vo, Thi-Kim-Quyen Lee, Jeong-Jun Kang, Joon-Seok Park, Seogyeong Kim, Han-Seung |
author_sort | Vo, Thi-Kim-Quyen |
collection | PubMed |
description | Sulfur-based carriers were examined to enhance the nitrogen removal efficiency in a mixed anoxic–anaerobic-membrane bioreactor system, in which sulfur from the carrier acts as an electron donor for the conversion of nitrate to nitrogen gas through the autotrophic denitrification process. A total nitrogen removal efficiency of 63% was observed in the system with carriers, which showed an increase in the removal efficiency of around 20%, compared to the system without carriers. The results also indicated that the carriers had no adverse effect on biological treatment for the organic matter and total phosphorus. The removal efficiencies for chemical oxygen demand (COD) and total phosphorus (TP) were 98% and 37% in both systems, respectively. The generation of sulfate ions was a major disadvantage of using sulfur-based carriers, and resulted in pH drop. The ratio of sulfate in the effluent to nitrate removed in the system ranged from 0.86 to 1.97 mgSO(4)(2−)/mgNO(3)(−)-N, which was lower than the theoretical value and could be regarded as due to the occurrence of simultaneous heterotrophic and autotrophic denitrification. |
format | Online Article Text |
id | pubmed-6316607 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-63166072019-01-10 Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR) Vo, Thi-Kim-Quyen Lee, Jeong-Jun Kang, Joon-Seok Park, Seogyeong Kim, Han-Seung Membranes (Basel) Article Sulfur-based carriers were examined to enhance the nitrogen removal efficiency in a mixed anoxic–anaerobic-membrane bioreactor system, in which sulfur from the carrier acts as an electron donor for the conversion of nitrate to nitrogen gas through the autotrophic denitrification process. A total nitrogen removal efficiency of 63% was observed in the system with carriers, which showed an increase in the removal efficiency of around 20%, compared to the system without carriers. The results also indicated that the carriers had no adverse effect on biological treatment for the organic matter and total phosphorus. The removal efficiencies for chemical oxygen demand (COD) and total phosphorus (TP) were 98% and 37% in both systems, respectively. The generation of sulfate ions was a major disadvantage of using sulfur-based carriers, and resulted in pH drop. The ratio of sulfate in the effluent to nitrate removed in the system ranged from 0.86 to 1.97 mgSO(4)(2−)/mgNO(3)(−)-N, which was lower than the theoretical value and could be regarded as due to the occurrence of simultaneous heterotrophic and autotrophic denitrification. MDPI 2018-11-22 /pmc/articles/PMC6316607/ /pubmed/30469519 http://dx.doi.org/10.3390/membranes8040115 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Vo, Thi-Kim-Quyen Lee, Jeong-Jun Kang, Joon-Seok Park, Seogyeong Kim, Han-Seung Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR) |
title | Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR) |
title_full | Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR) |
title_fullStr | Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR) |
title_full_unstemmed | Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR) |
title_short | Nitrogen Removal by Sulfur-Based Carriers in a Membrane Bioreactor (MBR) |
title_sort | nitrogen removal by sulfur-based carriers in a membrane bioreactor (mbr) |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6316607/ https://www.ncbi.nlm.nih.gov/pubmed/30469519 http://dx.doi.org/10.3390/membranes8040115 |
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