Ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment

Abstract Nitrification is the rate limiting step in the nitrogen removal processes since nitrifiers have high oxygen demand, but poorly compete with aerobic heterotrophs. In a laboratory-scaled system, we investigated a process of ammonium oxidation under ferric-iron reducing condition (feammox) in...

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Autores principales:	Chung Phuong Le, Hai Thi Nguyen, Toi Duy Nguyen, Quyen Huynh Minh Nguyen, Hai The Pham, Hang Thuy Dinh
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ff06ca609c8645818c92170286de6722
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spelling	oai:doaj.org-article:ff06ca609c8645818c92170286de67222021-12-02T14:12:43ZAmmonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment10.1038/s41598-020-80057-y2045-2322https://doaj.org/article/ff06ca609c8645818c92170286de67222021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80057-yhttps://doaj.org/toc/2045-2322Abstract Nitrification is the rate limiting step in the nitrogen removal processes since nitrifiers have high oxygen demand, but poorly compete with aerobic heterotrophs. In a laboratory-scaled system, we investigated a process of ammonium oxidation under ferric-iron reducing condition (feammox) in the presence of organic carbon using influents with high NH4 + and COD contents, and ferrihydrite as the only electron acceptor. Batch incubations testing influents with different NH4 + and COD concentrations revealed that the [COD]/[NH4 +] ratio of 1.4 and the influent redox potential ranging from − 20 to + 20 mV led to the highest removal efficiencies, i.e. 98.3% for NH4 + and 58.8% for COD. N2 was detected as the only product of NH4 + conversion, whereas NO2 − and NO3 − were not detected. While operating continuously with influent having a [COD]/[NH4 +] ratio of 1.4, the system efficiently removed NH4 + (> 91%) and COD (> 54%) within 6 day retention time. Fluorescence in situ hybridization analyses using Cy3-labeled 16S rRNA oligonucleotide probes revealed that gamma-proteobacteria dominated in the microbial community attaching to the matrix bed of the system. The iron-reduction dependent NH4 + and COD co-removal with a thorough conversion of NH4 + to N2 demonstrated in this study would be a novel approach for nitrogen treatment.Chung Phuong LeHai Thi NguyenToi Duy NguyenQuyen Huynh Minh NguyenHai The PhamHang Thuy DinhNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chung Phuong Le Hai Thi Nguyen Toi Duy Nguyen Quyen Huynh Minh Nguyen Hai The Pham Hang Thuy Dinh Ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment
description	Abstract Nitrification is the rate limiting step in the nitrogen removal processes since nitrifiers have high oxygen demand, but poorly compete with aerobic heterotrophs. In a laboratory-scaled system, we investigated a process of ammonium oxidation under ferric-iron reducing condition (feammox) in the presence of organic carbon using influents with high NH4 + and COD contents, and ferrihydrite as the only electron acceptor. Batch incubations testing influents with different NH4 + and COD concentrations revealed that the [COD]/[NH4 +] ratio of 1.4 and the influent redox potential ranging from − 20 to + 20 mV led to the highest removal efficiencies, i.e. 98.3% for NH4 + and 58.8% for COD. N2 was detected as the only product of NH4 + conversion, whereas NO2 − and NO3 − were not detected. While operating continuously with influent having a [COD]/[NH4 +] ratio of 1.4, the system efficiently removed NH4 + (> 91%) and COD (> 54%) within 6 day retention time. Fluorescence in situ hybridization analyses using Cy3-labeled 16S rRNA oligonucleotide probes revealed that gamma-proteobacteria dominated in the microbial community attaching to the matrix bed of the system. The iron-reduction dependent NH4 + and COD co-removal with a thorough conversion of NH4 + to N2 demonstrated in this study would be a novel approach for nitrogen treatment.
format	article
author	Chung Phuong Le Hai Thi Nguyen Toi Duy Nguyen Quyen Huynh Minh Nguyen Hai The Pham Hang Thuy Dinh
author_facet	Chung Phuong Le Hai Thi Nguyen Toi Duy Nguyen Quyen Huynh Minh Nguyen Hai The Pham Hang Thuy Dinh
author_sort	Chung Phuong Le
title	Ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment
title_short	Ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment
title_full	Ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment
title_fullStr	Ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment
title_full_unstemmed	Ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment
title_sort	ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/ff06ca609c8645818c92170286de6722
work_keys_str_mv	AT chungphuongle ammoniumandorganiccarboncoremovalunderfeammoxcoupledwithheterotrophyconditionasanefficientapproachfornitrogentreatment AT haithinguyen ammoniumandorganiccarboncoremovalunderfeammoxcoupledwithheterotrophyconditionasanefficientapproachfornitrogentreatment AT toiduynguyen ammoniumandorganiccarboncoremovalunderfeammoxcoupledwithheterotrophyconditionasanefficientapproachfornitrogentreatment AT quyenhuynhminhnguyen ammoniumandorganiccarboncoremovalunderfeammoxcoupledwithheterotrophyconditionasanefficientapproachfornitrogentreatment AT haithepham ammoniumandorganiccarboncoremovalunderfeammoxcoupledwithheterotrophyconditionasanefficientapproachfornitrogentreatment AT hangthuydinh ammoniumandorganiccarboncoremovalunderfeammoxcoupledwithheterotrophyconditionasanefficientapproachfornitrogentreatment
_version_	1718391823830876160

Ammonium and organic carbon co-removal under feammox-coupled-with-heterotrophy condition as an efficient approach for nitrogen treatment

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