Kinetic Analysis for Biodesulfurization of Dibenzothiophene using R. rhodochrous Adsorbed on Silica-Reference-Cited by-同舟云学术

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

Published:2018-12-01 Issue:4 Volume:25 Page:549-556
ISSN:1898-6196
Container-title:Ecological Chemistry and Engineering S
language:en
Short-container-title:

Author:

Canales Christian¹,Eyzaguirre Johanna²,Baeza Patricio²,Aballay Paulina²,Ojeda Juan³

Affiliation:

1. Biotechnology Engineering Laboratory , Faculty of Engineering and Technology , San Sebastián University , Lientur 1457, Concepción , 4030000 , Chile , phone +56 41 240 74 27, fax +56 41 240 00 02

2. Institute of Chemistry, Faculty of Sciences , Pontifical Catholic University of Valparaíso , Avenida Universidad 330, Curauma, Valparaíso , 4030000 , Chile , phone +56 32 227 49 30, fax +56 32 227 49 73

3. Faculty of Pharmacy , University of Valparaíso , Avenida Gran Bretaña 1093, Valparaíso , 4030000 , Chile , phone +56 32 250 84 39, fax +56 32 250 81 11

Abstract

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 r 2 = 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.

Publisher

Walter de Gruyter GmbH

Subject

Environmental Chemistry,Environmental Engineering

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