Woodchip bioreactors provide sustained denitrification of brine from groundwater desalination plants
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Díaz García, Carolina; Martínez Sánchez, Juan José; Maxwell, Bryan M.; Franco Leemhuis, José Antonio; Álvarez Rogel, JoséÁrea de conocimiento
Edafología y Química AgrícolaPatrocinadores
This study was supported by the Chair of Sustainable Agriculture for the Campo de Cartagena (Cátedra de Agricultura Sostenible para el Campo de Cartagena).Fecha de publicación
2021-07Editorial
ElsevierCita bibliográfica
Díaz-García, C.; Martínez-Sánchez, J.J.; Maxwell, B.M.; Franco, J.A.; Álvarez-Rogel, J. (2021). Woodchip bioreactors provide sustained denitrification of brine from groundwater desalination plants. Journal of Environmental Management, 289, 112521. https://doi.org/10.1016/j.jenvman.2021.112521Revisión por pares
siPalabras clave
Brine managementNitrate removal
Batch bioreactors
Denitrification efficiency
Resumen
Woodchip bioreactors are widely known as a best management practice to reduce excess nitrate loads that are discharged with agricultural leachates. The aim of this study was to evaluate the performance of citrus woodchip bioreactors for denitrification of brine (electrical conductivity ≈ 17 mS cm-1) from groundwater desalination plants with high nitrate content (NO3--N ≈ 48 mg L-1) in the Campo de Cartagena agricultural watershed, one of the main providers of horticultural products in Europe. The performance was evaluated relative to seasonal changes in temperature, dissolved organic carbon (DOC) provided by woodchips, hydraulic residence time (HRT) and woodchip aging. Bioreactors (capacity 1 m3) operated for 2.5 years (121 weeks) in batch mode (24 h HRT) with three batches per week. Denitrification efficiency was modulated by DOC concentration, temperature, hydraulic residence time and the drying-rewetting cycles. High salinity of brine did not prevent nitrate removal from occurring. ...
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