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Kinetic Analysis for Biodesulfurization of Dibenzothiophene using R. rhodochrous Adsorbed on Silica Cover

Kinetic Analysis for Biodesulfurization of Dibenzothiophene using R. rhodochrous Adsorbed on Silica

Open Access
|Jan 2019

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.

DOI: https://doi.org/10.1515/eces-2018-0036 | Journal eISSN: 2084-4549 | Journal ISSN: 1898-6196
Language: English
Page range: 549 - 556
Published on: Jan 3, 2019
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2019 Christian Canales, Johanna Eyzaguirre, Patricio Baeza, Paulina Aballay, Juan Ojeda, published by Society of Ecological Chemistry and Engineering
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.