Microbial degradation of resins fractionated from Arabian light crude oil

1995 ◽  
Vol 41 (4-5) ◽  
pp. 418-424 ◽  
Author(s):  
Kasthuri Venkateswaran ◽  
Toshihiro Hoaki ◽  
Misako Kato ◽  
Tadashi Maruyama
Keyword(s):  
Crude Oil ◽  
Microbial Degradation ◽  
Sole Source ◽  
Mixed Population ◽  
Pseudomonas Sp ◽  
Sediment Samples ◽  
First Report ◽  
Light Crude Oil ◽  
Oil Biodegradation

Sediment samples from Japanese coasts were screened for microorganisms able to degrade resin components of crude oil, and a mixed population that could degrade 35% of 5000 ppm resin in 15 days was obtained. This population also metabolized 50% of saturates and aromatics present in crude oil (5000 ppm) in 7 days. A Pseudomonas sp. isolated from the mixed population emulsified and degraded 30% of resins. This strain also degraded saturates and aromatics (30%) present in crude oil (5000 ppm). This is the first report describing organisms that are able to grow on the resin fraction of crude oil as a sole source of carbon and energy.Key words: resin, crude oil, biodegradation, Iatroscan.

Comparison of the biodegradability of crude and fuel oils

1976 ◽  
Vol 22 (4) ◽  
pp. 598-602 ◽  
Author(s):  
J. D. Walker ◽  
L. Petrakis ◽  
R. R. Colwell
Keyword(s):  
Crude Oil ◽  
Microbial Degradation ◽  
Mixed Population ◽  
Fuel Oil ◽  
Fuel Oils ◽  
Generic Composition ◽  
Low Sulfur ◽  
South Louisiana

Crude and fuel oils were compared for ability to support growth of a mixed population of estuarine bacteria. A total of four oils, two crude and two fuel oils, were examined. It was found that each of the oils supported a unique population of bacteria and yeasts, with respect to generic composition. Low-sulfur, high-saturate, South Louisiana crude oil was found to be highly susceptible to degradation. In contrast, the dense, high-sulfur, high-aromatic, Bunker C fuel oil was strongly refractory to microbial degradation.

The contribution of chemical dispersants and biosurfactants on crude oil biodegradation by Pseudomonas sp. LSH-7′

2017 ◽  
Vol 153 ◽  
pp. 74-82 ◽  
Author(s):  
Yongrui Pi ◽  
Mutai Bao ◽  
Yuanqiang Liu ◽  
Taiyu Lu ◽  
Rui He
Keyword(s):  
Crude Oil ◽  
Pseudomonas Sp ◽  
Oil Biodegradation

scholarly journals Effects of Dispersants and Biosurfactants on Crude-Oil Biodegradation and Bacterial Community Succession

2021 ◽  
Vol 9 (6) ◽  
pp. 1200
Author(s):  
Gareth E. Thomas ◽  
Jan L. Brant ◽  
Pablo Campo ◽  
Dave R. Clark ◽  
Frederic Coulon ◽  
...  
Keyword(s):  
Crude Oil ◽  
Early Stage ◽  
Niche Partitioning ◽  
Hydrocarbon Biodegradation ◽  
Hydrocarbonoclastic Bacteria ◽  
Bacterial Response ◽  
Oil Biodegradation ◽  
Interfacial Surface ◽  
Degrading Bacteria ◽  
Oil Spill Response

This study evaluated the effects of three commercial dispersants (Finasol OSR 52, Slickgone NS, Superdispersant 25) and three biosurfactants (rhamnolipid, trehalolipid, sophorolipid) in crude-oil seawater microcosms. We analysed the crucial early bacterial response (1 and 3 days). In contrast, most analyses miss this key period and instead focus on later time points after oil and dispersant addition. By focusing on the early stage, we show that dispersants and biosurfactants, which reduce the interfacial surface tension of oil and water, significantly increase the abundance of hydrocarbon-degrading bacteria, and the rate of hydrocarbon biodegradation, within 24 h. A succession of obligate hydrocarbonoclastic bacteria (OHCB), driven by metabolite niche partitioning, is demonstrated. Importantly, this succession has revealed how the OHCB Oleispira, hitherto considered to be a psychrophile, can dominate in the early stages of oil-spill response (1 and 3 days), outcompeting all other OHCB, at the relatively high temperature of 16 °C. Additionally, we demonstrate how some dispersants or biosurfactants can select for specific bacterial genera, especially the biosurfactant rhamnolipid, which appears to provide an advantageous compatibility with Pseudomonas, a genus in which some species synthesize rhamnolipid in the presence of hydrocarbons.

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