Microbial Strategies for Oil Biodegradation

Kapellos, George E.

doi:10.1016/b978-0-12-804595-4.00002-x

Cited by 21 publications

(19 citation statements)

References 91 publications

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“…This research has been incorporated into NOAA's GNOME oil spill model, by including a new biodegradation algorithm, which is dependent on the surface area of droplets [73]. Work performed by Kapellos [85] and Kapellos et al [86] on the effect of biofilm formation, including the development of a shrinking core model, has not yet found its way into operational oil spill models. A comparison of different modeling approaches for oil droplets biodegradation following a deep sea blowout is documented in [72], employing the TAMOC model [87], while the importance of initial oil droplet size distribution and biodegradation for the subsurface transport of oil spills is highlighted in the work of North et al [88] using LTRANS.…”

Section: Biodegradationmentioning

confidence: 99%

“…Οcean currents, density stratification, biodegradation of oil droplets (included in GNOME, SIMAP, OSCAR, BLOSOM and TAMOC), oil dissolution (considered in all models reviewed here except for CDOG and BLOSOM), and the oil droplet size distribution from a deep sea blowout greatly influence subsea oil fate and trajectories. In the Deepwater Horizon accident, the significant role of biodegradation of dissolved oil and oil droplets was indicated in several studies (e.g., [85]). Finally, blowout models face challenges, due to the fact that there are gaps in measurements of deep sea currents.…”

Section: Deep Sea Blowout/buoyant Plume Modelsmentioning

confidence: 99%

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Oil Spill Modeling: A Critical Review on Current Trends, Perspectives, and Challenges

Keramea

Spanoudaki

Zodiatis

et al. 2021

JMSE

145

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Several oil spill simulation models exist in the literature, which are used worldwide to simulate the evolution of an oil slick created from marine traffic, petroleum production, or other sources. These models may range from simple parametric calculations to advanced, new-generation, operational, three-dimensional numerical models, coupled to meteorological, hydrodynamic, and wave models, forecasting in high-resolution and with high precision the transport and fate of oil. This study presents a review of the transport and oil weathering processes and their parameterization and critically examines eighteen state-of-the-art oil spill models in terms of their capacity (a) to simulate these processes, (b) to consider oil released from surface or submerged sources, (c) to assimilate real-time field data for model initiation and forcing, and (d) to assess uncertainty in the produced predictions. Based on our review, the most common oil weathering processes involved are spreading, advection, diffusion, evaporation, emulsification, and dispersion. The majority of existing oil spill models do not consider significant physical processes, such as oil dissolution, photo-oxidation, biodegradation, and vertical mixing. Moreover, timely response to oil spills is lacking in the new generation of oil spill models. Further improvements in oil spill modeling should emphasize more comprehensive parametrization of oil dissolution, biodegradation, entrainment, and prediction of oil particles size distribution following wave action and well blow outs.

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Section: Biodegradationmentioning

confidence: 99%

Section: Deep Sea Blowout/buoyant Plume Modelsmentioning

confidence: 99%

Oil Spill Modeling: A Critical Review on Current Trends, Perspectives, and Challenges

Keramea

Spanoudaki

Zodiatis

et al. 2021

JMSE

145

View full text Add to dashboard Cite

show abstract

“…Additionally, there are many biosurfactants, each with a variety of potential applications [24][25][26], though the cost of producing biosurfactants restricts their application to very specific clean-up operations. However, since biosurfactants are one of the most in-demand biotechnological compounds, promising strategies for lower-cost production are emerging [27].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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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“…The solubility of most oil compounds is rather low, but may be enhanced by the action of surfactant micelles [ 23 , 24 , 25 , 26 , 27 ]. The biodegradation rate depends on the microbial strategy for oil uptake, the concentration of microbes, the intrinsic kinetics for oil consumption, the physical conditions (temperature, pressure, pH, salinity) and the availability of electron acceptors and mineral nutrients [ 8 , 9 , 10 , 28 , 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

“…Three major microbial strategies have been identified for accessing and assimilating oily substrates; an outline is given here and a more detailed discussion is available in [ 31 ]. In a first strategy, microbes firmly adhere to the oil–water interface and sip oil compounds directly from the oily phase.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Insight into the Biodegradation of Solitary Oil Microdroplets Moving through a Water Column

et al. 2018

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In the aftermath of oil spills in the sea, clouds of droplets drift into the seawater column and are carried away by sea currents. The fate of the drifting droplets is determined by natural attenuation processes, mainly dissolution into the seawater and biodegradation by oil-degrading microbial communities. Specifically, microbes have developed three fundamental strategies for accessing and assimilating oily substrates. Depending on their affinity for the oily phase and ability to proliferate in multicellular structures, microbes might either attach to the oil surface and directly uptake compounds from the oily phase, or grow suspended in the aqueous phase consuming solubilized oil, or form three-dimensional biofilms over the oil–water interface. In this work, a compound particle model that accounts for all three microbial strategies is developed for the biodegradation of solitary oil microdroplets moving through a water column. Under a set of educated hypotheses, the hydrodynamics and solute transport problems are amenable to analytical solutions and a closed-form correlation is established for the overall dissolution rate as a function of the Thiele modulus, the Biot number and other key parameters. Moreover, two coupled ordinary differential equations are formulated for the evolution of the particle size and used to investigate the impact of the dissolution and biodegradation processes on the droplet shrinking rate.

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Microbial Strategies for Oil Biodegradation

Cited by 21 publications

References 91 publications

Oil Spill Modeling: A Critical Review on Current Trends, Perspectives, and Challenges

Oil Spill Modeling: A Critical Review on Current Trends, Perspectives, and Challenges

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

Theoretical Insight into the Biodegradation of Solitary Oil Microdroplets Moving through a Water Column

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