Effect of dispersing oil phase on the biodegradability of a solid alkane dissolved in non-biodegradable oil View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2002-01

AUTHORS

K. Hori, Y. Matsuzaki, Y. Tanji, H. Unno

ABSTRACT

Acinetobacter sp. CR was grown on a model oil, which consisted of an inert oil matrix of pristane with n-heneicosane dissolved in it as the sole carbon source, in a stirred-tank bioreactor. This bacterium takes up substrates from the oil phase by direct contact with the oil phase. A previously established mathematical model was applied to reveal the effect of agitation conditions on the growth and n-alkane degradation kinetics of the bacterium. Higher impeller speed resulted in both lower microbial growth and lower n-alkane degradation rate of the bacterium, although it increased the specific surface area of the oil, which was measured by a previously developed device. This result was due to the decreased number of cells adhering to the oil surface, i.e., intense agitation inhibited the adhesion of cells to the oil surface. The addition of a surfactant below a critical micelle concentration (CMC) inhibited the degradation of n-heneicosane dissolved in pristane, although the biodegradability of the substrate recovered gradually with the increase in the dose of surfactant over CMC. The results suggest that efforts to increase the specific surface area of the oil phase have the undesirable result of inhibiting oil degradation when the dominant microbial degraders take up substrates in oil by direct contact with the oil. More... »

PAGES

574-579

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00253-002-1021-9

DOI

http://dx.doi.org/10.1007/s00253-002-1021-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1027274871

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/12172628


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