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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...

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Autores principales: Vo, Thi-Kim-Quyen, Lee, Jeong-Jun, Kang, Joon-Seok, Park, Seogyeong, Kim, Han-Seung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
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.
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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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