Removal of hydrogen sulfide by immobilized Thiobacillus thioparus in a biotrickling filter packed with polyurethane foam

Martín Ramírez, José Manuel Gómez, GERMAN EDUARDO AROCA ARCAYA, Domingo Cantero

Research output: Contribution to journalArticlepeer-review

135 Scopus citations

Abstract

In the work described here, a biotrickling filter with Thiobacillus thioparus (ATCC 23645) immobilized on polyurethane foam is proposed for the removal of hydrogen sulfide contained in air. The effect of surface velocity of the recirculation medium (5.9-1.2 m/h), sulfate concentration inhibition (3.0-10.7 g/L), pH (6.0-8.2), empty bed residence time (EBRT) (150-11 s) for constant loads of 11.5 and 2.9 g S/m3/h, and pressure drop of the system were investigated. The total amount of biomass immobilized on the carrier was 8.2 ± 1.3 × 1010 cells/g. The optimal values of the operating variables were: pH between 7.0 and 7.5, surface velocity of 5.9 m/h and sulfate concentration below 5 g/L. The critical EC value was 14.9 g S/m3/h (removal efficiency of 99.8%) and the ECmax was 55.0 g S/m3/h (removal efficiency of 79.8%) for an EBRT of 150 s. For loads of 2.89 ± 0.05 and 11.5 ± 0.1 g S/m3/h, the removal efficiency was higher than 99% for an EBRT over 90 s.

Original languageEnglish
Pages (from-to)4989-4995
Number of pages7
JournalBioresource Technology
Volume100
Issue number21
DOIs
StatePublished - 1 Nov 2009

Keywords

  • Biotrickling filter
  • Hydrogen sulfide
  • Polyurethane foam
  • Thiobacillus thioparus

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