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" Crude oil depletion by bacterial strains isolated from a petroleum hydrocarbon impacted solid waste management site in California "
Xia, M; Liu, Y; Taylor, AA; Fu, D; Khan, AR; Terry, N
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AL
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| Record Number
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907733
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LA66m0009k
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| Title & Author
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Crude oil depletion by bacterial strains isolated from a petroleum hydrocarbon impacted solid waste management site in California [Article]\ Xia, M; Liu, Y; Taylor, AA; Fu, D; Khan, AR; Terry, N
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2017
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UC Berkeley
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| Abstract
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© 2017 Elsevier Ltd This research is part of a multidisciplinary research program to develop a bioremediation protocol for a solid waste management (SWM) site in Northern California - a site which is heavily contaminated with petroleum hydrocarbons. In this initial study, 30 bacterial strains were isolated and evaluated for their efficiencies to deplete crude oil. The 3 most efficient bacterial isolates for crude oil depletion were designated as S1BD1, OPKDS2, and OSDS1; they were identified as Serratia proteamaculans, Alcaligenes sp. and Rhodococcus erythropolis, respectively, based on partial 16S rRNA gene sequences. Determination of crude oil depletion efficiency by gas chromatography–mass spectrometry (GC-MS) revealed that Serratia proteamaculans S1BD1 was the most efficient (68.0 ± 1.78%), followed by Alcaligenes sp. OPKDS2 (63.7 ± 3.28%), and Rhodococcus erythropolis OSDS1 (54.9 ± 5.07%). S. proteamaculans S1BD1 was able to deplete a wide spectrum of carbon compounds within the individual components of crude oil. Alcaligenes sp. OPKDS2 was the most efficient at depleting BTEX (91.2 ± 1.90%), and R. erythropolis OSDS1 exhibited a substrate preference of n-alkanes. All three strains exhibited unusually high crude oil depletion efficiencies and tolerated a wide range of salinity and pH levels, which makes them excellent candidates for bioaugmentation of the SWM site.
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