Publications and responsibilities
Oil type and temperature dependent biodegradation dynamics. Combining chemical and microbial community data through multivariate analysis.
Background This study investigates a comparative multivariate approach for studying the biodegradation of chemically dispersed oil. The rationale for this approach lies in the inherent complexity of the data and challenges associated with comparing multiple experiments with inconsistent sampling...
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Oil droplet generation and incubation for biodegradation studies
Biodegradation of oil in the marine water column is mainly associated with oil dispersions. The operational use of chemical dispersants may therefore enhance oil biodegradation in seawater. The dispersant treatment results in oil droplet size reductions, increasing the surface-to-oil ratio of the...
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Microbial communities related to biodegradation of dispersed Macondo oil at low seawater temperature with Norwegian coastal seawater
The Deepwater Horizon (DWH) accident in 2010 created a deepwater plume of small oil droplets from a deepwater well in the Mississippi Canyon lease block 252 (‘Macondo oil’). A novel laboratory system was used in the current study to investigate biodegradation of Macondo oil dispersions (10 μm or...
Biodegradation of dispersed Macondo oil in seawater at low temperature and different oil droplet sizes
During the Deepwater Horizon (DWH) accident in 2010 a dispersant (Corexit 9500) was applied at the wellhead to disperse the Macondo oil and reduce the formation of surface slicks. A subsurface plume of small oil droplets was generated near the leaking well at 900–1300 m depth. A novel laboratory...
Microbial communities associated with biodegradation in microcosm studies of dispersed MC252 oil with coastal Atlantic seawater from Norway
Biodegradation of dispersed MC252 oil compounds related to oil droplet size
Ralstonia sp U2 naphthalene dioxygenase and Comamonas sp JS765 nitrobenzene dioxygenase show differences in activity towards methylated naphthalenes
Methylsubstituted naphthalenes constitute a significant part of light gas oil fractions (LGO). These are toxic compounds with low fuel value, and can potentially be enzymatically modified to increase the fuel value and at the same time reduce toxicity. The first step in the biodegradation of...