Control and Test bioreactors
were monitored for a total period of 266 days in sequencing batch,
simulating operating conditions of oil refinery continuous
reactors: 5.5 h reaction time, sludge age of 20 d, volumetric
organic load (VOL) of 1.2 kg COD/m3 d and F/M of 0.4 kg consumed
COD/kg VSS. Two daily medium exchanges were made.