Artículo
Sequential application of activated sludge and phytoremediation with aquatic macrophytes on tannery effluents: in search of a complete treatment
Fernandez, Marilina
; Gómez, Roxana J.; González, Paola Solange
; Barroso, Cintia Natalí
; Paisio, Cintia Elizabeth
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Fecha de publicación:
05/2023
Editorial:
Springer
Revista:
Environmental Science and Pollution Research
ISSN:
1614-7499
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Tannery effluents with a high organic matter load (indicated by their COD level) have to be treated before they are discharged, so as to minimize their negative impact on the environment. Using field mesocosm systems, this study evaluated the feasibility of treating such effluents through bioaugmentation with activated sludge, followed by phytoremediation with aquatic macrophytes (Lemnoideae subfamily). Regardless of its quality, the activated sludge was able to remove approximately 77% of the COD from effluents with a low initial organic load (up to 1500 mg/L). The macrophytes then enhanced removal (up to 86%), so the final COD values were permissible under the current legislation for effluent discharge. When the initial organic load in the undiluted effluents was higher (around 3000 mg/L), the COD values obtained after consecutive bioaugmentation and phytoremediation were close to the legally allowed limits (583 mg/L), which highlights the potential of phytoremediation as a tertiary treatment. This treatment also brought total coliform counts down to legally acceptable values, without plant biomass decreasing over time. Moreover, the plant biomass remained viable and capable of high COD removal efficiency (around 75%) throughout two additional reuse cycles. These findings indicate that the efficiency of the biological treatments assayed here depends largely on the initial organic load in the tannery effluents. In any case, the sequential application of activated sludge and aquatic macrophytes proved to be a successful alternative for remediation.
Palabras clave:
Activated sludge
,
Phytorremediation
,
Effluents
,
Treatment
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Articulos (INBIAS)
Articulos de INSTITUTO DE BIOTECNOLOGIA AMBIENTAL Y SALUD
Articulos de INSTITUTO DE BIOTECNOLOGIA AMBIENTAL Y SALUD
Citación
Fernandez, Marilina; Gómez, Roxana J.; González, Paola Solange; Barroso, Cintia Natalí; Paisio, Cintia Elizabeth; Sequential application of activated sludge and phytoremediation with aquatic macrophytes on tannery effluents: in search of a complete treatment; Springer; Environmental Science and Pollution Research; 30; 29; 5-2023; 74196-74206
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