Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater

Implementation of onsite bioremediation technologies is essential for textile industries due to rising concerns in terms of water resources and quality. Partial nitritation-anaerobic ammonium oxidation (PN/A) processes emerged as a valid, but unexplored, solution. In this study, the performance of a...

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Autores principales:	Elisa Clagnan, Lorenzo Brusetti, Silvia Pioli, Simone Visigalli, Andrea Turolla, Mingsheng Jia, Martina Bargna, Elena Ficara, Giovanni Bergna, Roberto Canziani, Micol Bellucci
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Partial nitritation/anammox Textile wastewater Next-generation sequencing Quantitative polymerase chain reaction (qPCR) Nitrogen removal Science (General) Q1-390 Social sciences (General) H1-99
Acceso en línea:	https://doaj.org/article/50dbe54aad8b4cbca57c7b4e9031738f
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spelling	oai:doaj.org-article:50dbe54aad8b4cbca57c7b4e9031738f2021-12-02T05:03:15ZMicrobial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater2405-844010.1016/j.heliyon.2021.e08445https://doaj.org/article/50dbe54aad8b4cbca57c7b4e9031738f2021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2405844021025482https://doaj.org/toc/2405-8440Implementation of onsite bioremediation technologies is essential for textile industries due to rising concerns in terms of water resources and quality. Partial nitritation-anaerobic ammonium oxidation (PN/A) processes emerged as a valid, but unexplored, solution. In this study, the performance of a PN/A pilot-scale (9 m3) sequencing batch reactor treating digital textile printing wastewater (10–40 m3 d−1) was monitored by computing nitrogen (N) removal rate and efficiencies. Moreover, the structure of the bacterial community was assessed by next generation sequencing and quantitative polymerase chain reaction (qPCR) analyses of several genes, which are involved in the N cycle. Although anaerobic ammonium oxidation activity was inhibited and denitrification occurred, N removal rate increased from 16 to 61 mg N g VSS−1 d−1 reaching satisfactory removal efficiency (up to 70%). Ammonium (18–70 mg L−1) and nitrite (16–82 mg L−1) were detected in the effluent demonstrating an unbalance between the aerobic and anaerobic ammonia oxidation activity, while constant organic N was attributed to recalcitrant azo dyes. Ratio between nitrification and anammox genes remained stable reflecting a constant ammonia oxidation activity. A prevalence of ammonium oxidizing bacteria and denitrifiers suggested the presence of alternative pathways. PN/A resulted a promising cost-effective alternative for textile wastewater N treatment as shown by the technical-economic assessment. However, operational conditions and design need further tailoring to promote the activity of the anammox bacteria.Elisa ClagnanLorenzo BrusettiSilvia PioliSimone VisigalliAndrea TurollaMingsheng JiaMartina BargnaElena FicaraGiovanni BergnaRoberto CanzianiMicol BellucciElsevierarticlePartial nitritation/anammoxTextile wastewaterNext-generation sequencingQuantitative polymerase chain reaction (qPCR)Nitrogen removalScience (General)Q1-390Social sciences (General)H1-99ENHeliyon, Vol 7, Iss 11, Pp e08445- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Partial nitritation/anammox Textile wastewater Next-generation sequencing Quantitative polymerase chain reaction (qPCR) Nitrogen removal Science (General) Q1-390 Social sciences (General) H1-99
spellingShingle	Partial nitritation/anammox Textile wastewater Next-generation sequencing Quantitative polymerase chain reaction (qPCR) Nitrogen removal Science (General) Q1-390 Social sciences (General) H1-99 Elisa Clagnan Lorenzo Brusetti Silvia Pioli Simone Visigalli Andrea Turolla Mingsheng Jia Martina Bargna Elena Ficara Giovanni Bergna Roberto Canziani Micol Bellucci Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater
description	Implementation of onsite bioremediation technologies is essential for textile industries due to rising concerns in terms of water resources and quality. Partial nitritation-anaerobic ammonium oxidation (PN/A) processes emerged as a valid, but unexplored, solution. In this study, the performance of a PN/A pilot-scale (9 m3) sequencing batch reactor treating digital textile printing wastewater (10–40 m3 d−1) was monitored by computing nitrogen (N) removal rate and efficiencies. Moreover, the structure of the bacterial community was assessed by next generation sequencing and quantitative polymerase chain reaction (qPCR) analyses of several genes, which are involved in the N cycle. Although anaerobic ammonium oxidation activity was inhibited and denitrification occurred, N removal rate increased from 16 to 61 mg N g VSS−1 d−1 reaching satisfactory removal efficiency (up to 70%). Ammonium (18–70 mg L−1) and nitrite (16–82 mg L−1) were detected in the effluent demonstrating an unbalance between the aerobic and anaerobic ammonia oxidation activity, while constant organic N was attributed to recalcitrant azo dyes. Ratio between nitrification and anammox genes remained stable reflecting a constant ammonia oxidation activity. A prevalence of ammonium oxidizing bacteria and denitrifiers suggested the presence of alternative pathways. PN/A resulted a promising cost-effective alternative for textile wastewater N treatment as shown by the technical-economic assessment. However, operational conditions and design need further tailoring to promote the activity of the anammox bacteria.
format	article
author	Elisa Clagnan Lorenzo Brusetti Silvia Pioli Simone Visigalli Andrea Turolla Mingsheng Jia Martina Bargna Elena Ficara Giovanni Bergna Roberto Canziani Micol Bellucci
author_facet	Elisa Clagnan Lorenzo Brusetti Silvia Pioli Simone Visigalli Andrea Turolla Mingsheng Jia Martina Bargna Elena Ficara Giovanni Bergna Roberto Canziani Micol Bellucci
author_sort	Elisa Clagnan
title	Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater
title_short	Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater
title_full	Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater
title_fullStr	Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater
title_full_unstemmed	Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater
title_sort	microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/50dbe54aad8b4cbca57c7b4e9031738f
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Microbial community and performance of a partial nitritation/anammox sequencing batch reactor treating textile wastewater

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