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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 25, No. 1, 2017, pp. 58-63
Bioline Code: ej17010
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 25, No. 1, 2017, pp. 58-63

 en Characterization of a hyperthermophilic sulphur-oxidizing biofilm produced by archaea isolated from a hot spring
Valdebenito-Rolack, Emky; Ruiz-Tagle, Nathaly; Abarzúa, Leslie; Aroca, Germán & Urrutia, Homero

Abstract

Background: Sulphur-oxidizing microorganisms are widely used in the biofiltration of total reduced sulphur compounds (odorous and neurotoxic) produced by industries such as the cellulose and petrochemical industries, which include high-temperature process steps. Some hyperthermophilic microorganisms have the capability to oxidize these compounds at high temperatures (N60°C), and archaea of this group, for example, Sulfolobus metallicus check for this species in other resources , are commonly used in biofiltration technology.
Results: In this study, a hyperthermophilic sulphur-oxidizing strain of archaea was isolated from a hot spring (Chillán, Chile) and designated as M1. It was identified as archaea of the genus Sulfolobus check for this species in other resources (99% homology with S. solfataricus check for this species in other resources 16S rDNA). Biofilms of this culture grown on polyethylene rings showed an elemental sulphur oxidation rate of 95.15 ± 15.39 mg S l-1 d-1, higher than the rate exhibited by the biofilm of the sulphur-oxidizing archaea S. metallicus (56.8 ± 10.91 mg l-1 d-1).
Conclusions: The results suggest that the culture M1 is useful for the biofiltration of total reduced sulphur gases at high temperatures and for other biotechnological applications.

Keywords
Biofilms on polyethylene; Biofiltration; Cellulose industries; Denaturing gradient gel electrophoresis; extremophile; Hyperthermophile; Industrial gas emissions; Petroleum refinery; Sulfolobus; Sulphide; Sulphur-oxidizing archaea; Sulphur-oxidizing microorganisms

 
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