Effects of environmental conditions and bed configuration on oxygen transfer efficiency in aerated constructed wetlands

dc.contributor.authorVera-Puerto, Ismael
dc.contributor.authorCampal, José
dc.contributor.authorMartínez, Sandra
dc.contributor.authorCortés-Rico, Laura
dc.contributor.authorCoy, Hadher
dc.contributor.authorTan, Sheyie
dc.contributor.authorArias, Carlos A.
dc.contributor.authorBaquero-Rodríguez, Gustavo
dc.contributor.authorRosso, Diego
dc.date.accessioned2022-11-12T18:09:37Z
dc.date.available2022-11-12T18:09:37Z
dc.date.copyright2022en_US
dc.date.issued2022
dc.description.abstractThis research evaluated the oxygen transfer efficiency in beds to be used as aerated constructed wetlands. The research methods included oxygen transfer efficiency evaluations in several bed configurations using diffused aeration systems. Experiments were conducted at two locations with different environmental conditions: a) Talca (Chile), 120 m above sea level (m.a.s.l.), 0.99 Atm and b) Cajicá (Colombia), 2550 m.a.s.l., 0.76 Atm. A column with only clean water and three bed configurations representing aerated constructed wetlands were evaluated. These configurations included: (a) coarse gravel, (b) coarse gravel with an empty core in the middle (inner container), and (c) fine gravel. Three airflow rates were evaluated: (a) low, 0.7 L/min; (b) medium, 2.5 L/min; and (c) high, 3.6 L/min. The overall oxygen mass transfer coefficient, standard oxygen transfer rate, and standard oxygen transfer efficiency were the variables calculated from the oxygen transfer evaluation tests. The research results indicated that in diffused aeration systems, oxygen transfer efficiency was negatively influenced by environmental conditions, particularly altitude, which limits the driving force for oxygen transfer into water. Furthermore, the results showed that the size of the gravel used in the bed is related to the oxygen transfer efficiency: the larger the gravel size, the higher the oxygen transfer, regardless of the altitude. Finally, research regarding oxygen transfer in aerated constructed wetlands has signaled the need for a standard procedure for aeration testing, and this work suggests a new methodology.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis research was funded by the scholarship platform Academic and Student Mobility of the Pacific Alliance (Programa de Movilidad Estudiantil y Académica de la Alianza del Pacífico, Notification Carta 48/2019); and Agencia Nacional de Investigación y Desarrollo de Chile (ANID), grant number ANID/FONDECYT/11180672. The APC was funded by Universidad Católica del Maule.en_US
dc.identifier.citationVera-Puerto, I., Campal, J., Martínez, S., Cortés-Rico, L., Coy, H., Tan, S., . . . Rosso, D. (2022). “Effects of environmental conditions and bed configuration on oxygen transfer efficiency in aerated constructed wetlands.” Water, 14(20), 3284. https://doi.org/10.3390/w14203284en_US
dc.identifier.urihttps://doi.org/10.3390/w14203284
dc.identifier.urihttp://hdl.handle.net/1828/14441
dc.language.isoenen_US
dc.publisherWateren_US
dc.subjectaerationen_US
dc.subjectatmospheric pressureen_US
dc.subjectconstructed wetlandsen_US
dc.subjectgravel sizeen_US
dc.subjectoxygen transferen_US
dc.titleEffects of environmental conditions and bed configuration on oxygen transfer efficiency in aerated constructed wetlandsen_US
dc.typeArticleen_US

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