LIFirr with an Indicator of Microbial Activity in Paraffinic Oil
Authors: M. P. Casiraghi, C. M. Quintella, P. Almeida
Abstract:
Paraffinic oils were submitted to microbial action. The microorganisms consisted of bacteria of the genera Pseudomonas sp. and Bacillus lincheniforms. The alterations in interfacial tension were determined using a tensometer and applying the hanging drop technique at room temperature (299 K ±275 K). The alteration in the constitution of the paraffins was evaluated by means of gas chromatography. The microbial activity was observed to reduce interfacial tension by 54 to 78%, as well as consuming the paraffins C19 to C29 and producing paraffins C36 to C44. The LIFirr technique made it possible to determine the microbial action quickly.
Keywords: Paraffins, biosurfactants, LIFirr.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1100356
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