Kinetic analysis for biodesulfurization of dibenzothiophene using R. rhodochrous adsorbed on silica

Christian Canales, Johanna Eyzaguirre, PATRICIO FRANCISCO BAEZA CHANDIA, Paulina Aballay, Juan Ojeda

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Experimental biodesulfurization (BDS) data for dibenzothiophene (DBT) (1.0-7.0 mM) with Rhodococcus rhodochorus immobilized by adsorption on silica, were adjusted with liquid-film kinetic model (Fisher coefficient, F = 592.74 and probability value p << 0.05 and r2 = 0.97). Simulations predict the presence of considerable amounts of DBT surrounding the particles, which would be available for the cells adsorbed on the surface of silica. The greatest percentage removal (50 %) was obtained for adsorbed cell system over the suspended bacterial cells (30 %), showing that sulfur substrates are more bioavailable when the bacterial cells are adsorbed on silica. The liquid-film modelling with diffusional effects provides proper theoretical basis to explain the BDS performance obtained using adsorbed cells.

Original languageEnglish
Pages (from-to)549-556
Number of pages8
JournalEcological Chemistry and Engineering S
Volume25
Issue number4
DOIs
StatePublished - 1 Dec 2018
Externally publishedYes

Keywords

  • adsorption
  • biodesulfurization
  • immobilization
  • kinetic analysis
  • Rhodoccocus rhodochrous

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