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Effect of intermittent induced aeration on nitrogen removal and denitrifying-bacterial community structure in Cork and gravel vertical flow pilot-scale treatment wetlands

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Název:	Effect of intermittent induced aeration on nitrogen removal and denitrifying-bacterial community structure in Cork and gravel vertical flow pilot-scale treatment wetlands
Autoři:	Universitat Politècnica de Catalunya. Doctorat en Sostenibilitat, Universitat Politècnica de Catalunya. Departament d'Òptica i Optometria, Universitat Politècnica de Catalunya. CRESCA - Centre de Recerca en Seguretat i Control Alimentari, Universitat Politècnica de Catalunya. SUMMLab - Sustainability Measurement and Modeling Lab, Aguilar Pérez, Lorena, Gallegos Dávalos, Ángel, Pérez, Leonardo Martín, Arias, Carlos A., Rubio, Raquel, Haulani, Leila, García Raurich, Josep, Pallarés, Marc, de Pablo, Joan, Morató Farreras, Jordi
Informace o vydavateli:	2021-10
Druh dokumentu:	Electronic Resource
Abstrakt:	This is an Accepted Manuscript of an article published by Taylor & Francis Group in Journal of Environmental Science and Health, Part A on 2021, available online at: http://www.tandfonline.com/10.1080/10934529.2021.1967652. In this work, we have evaluated the impact of aeration in total nitrogen (TN), ammonia (NH4-N) and nitrate-nitrogen (NO3-N) removal in four pilot-scale vertical flow constructed wetlands (VFCW) using cork by-product or gravel as the filter material and planted with Phragmites australis. Both aerated and non-aerated systems achieved high COD and BOD5 elimination rates (= 90%) at the end of the 5-month. However, the aerated systems presented maximal BOD5 removal from the third month of operation onwards since air supply favoured the oxidative bioprocesses occurring within the wetlands. Cork and gravel aerated VFCW also proved to be more efficient (p < 0.05) in NO3-N removal than the non-aerated systems and this upgraded performance was correlated with a significant higher relative abundance of the nirS gene. The aerated systems also showed a slightly improved in NH4-N removal. Noticeably, cork VFCW showed higher TN removal mean values (~35%) than gravel wetlands (27-28%) regardless aeration. Moreover, cork VFCW showed higher relative abundance of the nosZ gene. Our results demonstrated a better nitrogen elimination for the aerated cork pilot-scale VFCW, and this behaviour was correlated with a higher abundance of both nirS and nosZ, two of the key functional genes involved in nitrogen metabolism. To LIFE Programme, the EU’s financial instrument supporting environmental, nature conservation and climate action projects throughout the EU, that supports LIFE ECORKWASTE 14 ENV/ES/460. Peer Reviewed Postprint (author's final draft)
Témata:	Àrees temàtiques de la UPC::Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament de l'aigua, Constructed wetlands, Vertical flow constructed wetlands, Cork by-product, Intermittent aeration, Nitrogen compounds removal, Denitrifying bacterial communities, Zones humides artificials, Article
URL:	https://hdl.handle.net/2117/356023 https://www.tandfonline.com/doi/abs/10.1080/10934529.2021.1967652 https://www.tandfonline.com/doi/abs/10.1080/10934529.2021.1967652 info:eu-repo/grantAgreement/EC/LIFE/LIFE14 ENV/ES/000460
Dostupnost:	Open access content. Open access content Open Access
Poznámka:	10 p. application/pdf English
Other Numbers:	HGF oai:upcommons.upc.edu:2117/356023 Aguilar, L. [et al.]. Effect of intermittent induced aeration on nitrogen removal and denitrifying-bacterial community structure in Cork and gravel vertical flow pilot-scale treatment wetlands. "Journal of environmental science and health. Part A, environmental science and engineering", Octubre 2021, vol. 56, núm. 10, p. 1121-1130. 0360-1226 10.1080/10934529.2021.1967652 1289791862
Přispívající zdroj:	UNIV POLITECNICA DE CATALUNYA From OAIster®, provided by the OCLC Cooperative.
Přístupové číslo:	edsoai.on1289791862
Databáze:	OAIster

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Abstrakt:	This is an Accepted Manuscript of an article published by Taylor & Francis Group in Journal of Environmental Science and Health, Part A on 2021, available online at: http://www.tandfonline.com/10.1080/10934529.2021.1967652.<br />In this work, we have evaluated the impact of aeration in total nitrogen (TN), ammonia (NH4-N) and nitrate-nitrogen (NO3-N) removal in four pilot-scale vertical flow constructed wetlands (VFCW) using cork by-product or gravel as the filter material and planted with Phragmites australis. Both aerated and non-aerated systems achieved high COD and BOD5 elimination rates (= 90%) at the end of the 5-month. However, the aerated systems presented maximal BOD5 removal from the third month of operation onwards since air supply favoured the oxidative bioprocesses occurring within the wetlands. Cork and gravel aerated VFCW also proved to be more efficient (p < 0.05) in NO3-N removal than the non-aerated systems and this upgraded performance was correlated with a significant higher relative abundance of the nirS gene. The aerated systems also showed a slightly improved in NH4-N removal. Noticeably, cork VFCW showed higher TN removal mean values (~35%) than gravel wetlands (27-28%) regardless aeration. Moreover, cork VFCW showed higher relative abundance of the nosZ gene. Our results demonstrated a better nitrogen elimination for the aerated cork pilot-scale VFCW, and this behaviour was correlated with a higher abundance of both nirS and nosZ, two of the key functional genes involved in nitrogen metabolism.<br />To LIFE Programme, the EU’s financial instrument supporting environmental, nature conservation and climate action projects throughout the EU, that supports LIFE ECORKWASTE 14 ENV/ES/460.<br />Peer Reviewed<br />Postprint (author's final draft)