Influencia de la variación de diésel en el proceso de bioventing en un suelo arenoso, en experimento en columna
Resumen
El presente estudio corresponde a la segunda fase del proyecto de cooperación institucional: Universidad Pontificia Bolivariana, Seccional Bucaramanga y el Instituto Colombiano de Petróleos, en buscan de una solución a la contaminación de suelos arenosos con diésel hasta concentraciones del 6% y a una profundidad máxima de 80 cm. Se contaminó un suelo artificialmente con diésel al 2%, 4% y al 6% en peso y se evaluó la técnica de Bioventing utilizando montajes en columnas. Los parámetros de seguimiento fueron: caudal de entrada, concentración de diésel, oxígeno disuelto y crecimiento bacteriano; controlados durante cuatro meses. Los resultados mostraron que la técnica de Bioventing es efectiva para suelos arenosos, con bajos contenidos de materia orgánica, caudales de infiltración bajos, pH entre 6 – 8, temperatura de operación de 22°C y concentraciones de oxígeno disuelto superiores a 0,5 mg/L, presentando porcentajes de remoción de diésel superiores al 50% en suelos contaminados a una concentración de diésel del 2% en peso.
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