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Título : Effect of aeration on nitrogen removal-associated microbial community in an innovative vertical cork-based constructed wetland for winery wastewater treatment
Autor : Aguilar, Lorena 
Pérez, Leonardo Martín 
Gallegos, Ángel 
Forés, Eva 
Arias, Carlos A. 
Bosch, Carme 
Verdum, Maria 
Jove, Patricia 
de Pablo, Joan 
Morató, Jordi 
Palabras clave : INDUSTRIA VITIVINICOLAVINOSCONTAMINACION POR NITRATOSFLUJO VERTICALCORCHOAIREACIONAGUAS RESIDUALESBODEGASBACTERIAS DESNITRIFICANTES
Fecha de publicación : 2022
Editorial : Elsevier
Cita : Aguilar, L. et al. Effect of aeration on nitrogen removal-associated microbial community in an innovative vertical cork-based constructed wetland for winery wastewater treatment [en línea]. Ecological Engineering. 2022, 185. doi: 10.1016/j.ecoleng.2022.106781.Disponible en:https://repositorio.uca.edu.ar/handle/123456789/15215
Resumen : Abstract: The wine industry produces large quantities of wastewater that often contains high levels of organic matter and nutrients, like nitrogen and phosphorous. In particular, nitrogen pollution can be harmful, even at low levels, since infants are vulnerable to nitrates in drinking water, and excess nitrogen can harm the health of soils and waterways. Herein, an innovative compact, modular, and mobile treatment wetland (TW) using cork by product as the only granular media was used to treat the final effluents from the Codorniu winery (Sant Sadurní d'Anoia, Spain). The TW was operated during two 5-month periods with or without intermittent induced aeration (40 min cycles, 90 L/min air flow rate). Nitrate (N-NO3) and total nitrogen (TN) removal were higher (52.8% and 46.8%, respectively, p < 0.05) during TW operation under aerated-condition. Additionally, qPCR analysis of 16S rRNA, nirS and nosZ genes revealed that intermittent induced aeration facilitates N-NO3 reduction by the stimulation of denitrifying bacteria in the TW biofilm (11.4% increase in nirS copies number/g cork sample, p < 0.05) as well as increasing the number of heterotrophic bacteria adhered to cork (25.5% increase in 16S rRNA copies number/g cork sample, p < 0.05). Moreover, SEM images demonstrated the suitability of cork as a resistant filter media for TW after long-term system operation (1.5 years). In conclusion, our results suggest that aeration improved nitrogen compounds removal compared to the non-aerated period, without affecting phosphorous elimination. Additionally, residual cork is presented here in a circular bioeconomy view, as a suitable filling media to treat winery wastewater that can provide additional carbon source to increase C/N rate stimulating denitrification, as well as a reliable organic substrate for biomass growth.
URI : https://repositorio.uca.edu.ar/handle/123456789/15215
ISSN : 0925- 8574
Disciplina: QUIMICA
DOI: 10.1016/j.ecoleng.2022.106781
Derechos: Acceso abierto
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