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The phenanthrene degradation and microbial growth at short times (t ≤ 16 days) using a fluidized bed reactor (FBR) with activated charcoal (AC) as support for the bacterial consortium in different seawater types (sterile and non-sterile) and inoculum additions were studied. The effect of the reactor operating conditions (sterile and nonsterile seawater, addition of inoculum, phenanthrene concentration of 112 mg L−1, and air flow of 1.5 L min−1) and variations in phenanthrene concentration (60, 200, and 600 mg L−1 at an air flow of 2 L min−1) were evaluated. Phenanthrene degradation at the maximum time was improved when an inoculum was added to the seawater (62.5%?69.5% of the initial concentration was degraded); the best microbial growth was observed when an inoculum was added to sterile seawater (constant concentration) and when phenanthrene concentration was 200 mg L−1; however, the highest degradation rate values (mg CFU−1) were obtained for a phenanthrene concentration of 600 mg L−1. Operating conditions and phenanthrene concentration had significant impacts on phenanthrene degradation and microbial growth (P < 0.05). The findings show that the FBR efficiency in phenanthrene degradation responds to multifactorial operating conditions; however, high efficiencies can be reached if the oper ting conditions, including inoculum addition, are carefully

revista mexicana de ingeniería química

EFFECT OF THE WATER TYPE, THE INOCULUM AND THE CONCENTRATION ON THE PHENANTHRENE DEGRADATION IN A FLUIDIZED BED REACTOR USING ACTIVATED CHARCOAL AS A BACTERIAL SUPPORT