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

  • C. Quintal Franco
  • O. Poot-Cobá
  • A. López-Padilla
  • C. Ponce-Caballero
  • G. Giácoman-Vallejos
  • I. Moreno-Andrade
  • V. R. Góngora-Echeverría https://orcid.org/0000-0001-8723-5571
Keywords: Phenanthrene degradation, microbial growth, fluidized bed reactor, inoculum, operating conditions.

Abstract

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 (water type, 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 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 a multi factorial operating conditions; however, high efficiencies can be reached if the operating conditions, including inoculum addition, are carefully controlled.

Author Biographies

C. Quintal Franco

Head of the postgraduate and research department, Faculty of Engineering, Autonomous University of Yucatan

O. Poot-Cobá

Marter Degree in Environmental Engineering by Faculty of Engineering, Autonomous University of Yucatan

A. López-Padilla

Marter Degree in Environmental Engineering by Faculty of Engineering, Autonomous University of Yucatan

C. Ponce-Caballero

Research Professor, Academic Area of Environmental Engineering

G. Giácoman-Vallejos

Head of the Environmental Engineering Laboratory, Facultad de Ingeniería, Universidad Autónoma de Yucatán

I. Moreno-Andrade
V. R. Góngora-Echeverría

P.h.D. in Environmental Engineering by the Faculty of Engineering, Autonomous University of Yucatan; Postdoctoral Fellow by Queen's University

Published
2019-06-16
How to Cite
Quintal Franco, C., Poot-Cobá, O., López-Padilla, A., Ponce-Caballero, C., Giácoman-Vallejos, G., Moreno-Andrade, I., & Góngora-Echeverría, V. (2019). 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. Revista Mexicana De Ingeniería Química, 19(1), 189-204. https://doi.org/10.24275/rmiq/IA416
Section
Environmental Engineering