Effects of oxygen on biodegradation of fuels in a corroding environment

Aktas, Deniz F.; Lee, Jason S.; Little, Brenda J.; Duncan, Kathleen E.; Perez-Ibarra, Beatriz Monica; Suflita, Joseph M.

doi:10.1016/j.ibiod.2012.05.006

Cited by 37 publications

(39 citation statements)

References 34 publications

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“…OTU X1-assA32 was a close relative (98% identity) to assA / masD gene sequence (ADJ51090) retrieved from a methanogenic paraffin degrading enrichment 40 . X1-assA22 clustered with 75% identity to assA / masD gene sequences obtained from fuel incubation 48 . J4-assA93 appeared to be far related to any assA / masD gene sequence available in the GenBank database.…”

Section: Resultsmentioning

confidence: 97%

Insights into the Anaerobic Biodegradation Pathway of n-Alkanes in Oil Reservoirs by Detection of Signature Metabolites

Bian

Mbadinga

Liu

et al. 2015

Sci Rep

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Anaerobic degradation of alkanes in hydrocarbon-rich environments has been documented and different degradation strategies proposed, of which the most encountered one is fumarate addition mechanism, generating alkylsuccinates as specific biomarkers. However, little is known about the mechanisms of anaerobic degradation of alkanes in oil reservoirs, due to low concentrations of signature metabolites and lack of mass spectral characteristics to allow identification. In this work, we used a multidisciplinary approach combining metabolite profiling and selective gene assays to establish the biodegradation mechanism of alkanes in oil reservoirs. A total of twelve production fluids from three different oil reservoirs were collected and treated with alkali; organic acids were extracted, derivatized with ethanol to form ethyl esters and determined using GC-MS analysis. Collectively, signature metabolite alkylsuccinates of parent compounds from C1 to C8 together with their (putative) downstream metabolites were detected from these samples. Additionally, metabolites indicative of the anaerobic degradation of mono- and poly-aromatic hydrocarbons (2-benzylsuccinate, naphthoate, 5,6,7,8-tetrahydro-naphthoate) were also observed. The detection of alkylsuccinates and genes encoding for alkylsuccinate synthase shows that anaerobic degradation of alkanes via fumarate addition occurs in oil reservoirs. This work provides strong evidence on the in situ anaerobic biodegradation mechanisms of hydrocarbons by fumarate addition.

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Section: Resultsmentioning

confidence: 97%

Insights into the Anaerobic Biodegradation Pathway of n-Alkanes in Oil Reservoirs by Detection of Signature Metabolites

Bian

Mbadinga

Liu

et al. 2015

Sci Rep

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“…At this point, there are few predictive measures in place that allow systematic evaluation of the susceptibility of emerging fuels to microbial contamination or evaluation of their ability to contribute to corrosion [ 10 ]. The identification of the molecular structures of individual fuel components that show increased risk for microbial degradation needs to be accomplished [ 11 ]. Fuel components are widely investigated for their compatibility with a given fuel system.…”

Section: Preliminary Research Prioritiesmentioning

confidence: 99%

Findings and Recommendations from the NIST Workshop on Alternative Fuels and Materials: Biocorrosion

Mansfield¹,

Sowards²,

Crookes‐Goodson³

2015

J. RES. NATL. INST. STAN.

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In 2013, the Applied Chemicals and Materials Division of the National Institute of Standards and Technology (NIST) hosted a workshop to identify and prioritize research needs in the area of biocorrosion. Materials used to store and distribute alternative fuels have experienced an increase in corrosion due to the unique conditions caused by the presence of microbes and the chemistry of biofuels and biofuel precursors. Participants in this workshop, including experts from the microbiological, fuel, and materials communities, delved into the unique materials and chemical challenges that occur with production, transport, and storage of alternative fuels. Discussions focused on specific problems including: a) the changing composition of “drop-in” fuels and the impact of that composition on materials; b) the influence of microbial populations on corrosion and fuel quality; and c) state-of-the-art measurement technologies for monitoring material degradation and biofilm formation.

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“…He reviewed the literature on anaerobic corrosion of carbon steel by SRB and concluded that oxygen was required for aggressive SRB-influenced corrosion. Aktas et al [61] demonstrated that low levels of oxygen (<100 ppb) in natural seawater influenced biodegradation pathways for alternative plant-derived fuels and subsequent SRB-influenced corrosion of carbon steel. The microbial activity at a metal surface resulted in a kinetically favored pathway of electron flow, giving rise to increased oxidation (corrosion weight loss) of iron.…”

Section: Sulfate-reducing Bacteriamentioning

confidence: 99%