“…A flooded packed-bed bioreactor of 15 cm in height and 8.4 cm in diameter (Mazuelos et al, 1999;Iglesias et al, 2016) with immobilized cells was employed to carry out continuous bio-oxidation tests. At the bottom of the reactors there was a hollow chamber, 5 cm in height, with nozzles for air and liquid medium inlets.…”