Degradación simultánea de compuestos fenólicos bajo condiciones desnitrificantes en un reactor UASB provisto con carbón activado granular
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https://doi.org/10.18633/biotecnia.v27.2452Palabras clave:
Compuestos fenólicos, carbón activado, isotermas de adsorción, reactor UASBResumen
El presente trabajo, estudió la capacidad de eliminación de una mezcla de compuestos fenólicos (phenol, p-cresol, o-cresol) por vía desnitrificante; además, el efecto del carbón activado granular (CAG) en el proceso realizado en reactores UASB (up-flow anaerobic sludge blanket). La carga orgánica se fue incrementando de 450 a 3250 mg C L-1d-1, mediante el ajuste del TRH de 2 to 0.25 d en el reactor con CAG y en el reactor control sin CAG. Las eficiencias de eliminación de los compuestos fenólicos aumentaron a medida que se incrementó la carga orgánica, obteniéndose valores del 89.7 % al 95.5 % en el reactor sin CAG, y del 95.8 al 99.1 % en el reactor con CAG. Para la eliminación de nitrato, el reactor con CAG alcanzó eficiencias de 79.3 % a 98.0 %, mientras que el control obtuvo 64.8 % a 96.9 %. Finalmente, se evaluaron las capacidades máximas del CAG mediante isotermas de ad[1]sorción, obteniéndose los siguientes valores (mg g-1): 164.6 para o-cresol, 134.5 para p-cresol, 110.7 para fenol y 44.4 para nitrato. Los resultados muestran la capacidad de un proceso desnitrificante de eliminar simultáneamente una mezcla de compuestos fenólicos, además, se observó que el CAG incrementó la eficiencia eliminación de todos los compuestos.
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