Enhancement of phase separation by the addition of de-emulsifiers to three-phase (diesel oil/biocatalyst/aqueous phase) emulsion in diesel biodesulfurization

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Ethanol, added as a de-emulsifier to separate oil and biocatalyst (or bacterial cells) from a three-phase (oil/biocatalyst/aqueous phase) emulsion, formed in diesel biodesulfurization employing Gordonia nitida, improved oil recovery by centrifugation from about 50% in its absence to almost 100% at 3% (v/v). The biocatalyst recovered with ethanol addition showed similar specific growth rates (0.03 h(-1)) and dibenzothiophene desulfurization rates (6-7.2 mol l(-1) h(-1)) to those (0.03 h(-1) and 7.1 mol l(1,) respectively) of the biocatalyst recovered with no ethanol addition. The desulfurization activity significantly increased as the number of the repeated recovery and reuse of the biocatalyst.
Publisher
SPRINGER
Issue Date
2003-01
Language
English
Article Type
Article
Keywords

GORDONA SP; DESULFURIZATION; OILS; MODEL; CYKS1

Citation

BIOTECHNOLOGY LETTERS, v.25, no.1, pp.73 - 77

ISSN
0141-5492
URI
http://hdl.handle.net/10203/85353
Appears in Collection
CBE-Journal Papers(저널논문)
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