Bioconversion of Heavy Hydrocarbon Cuts Containing High Amounts of Resins by Microbial Consortia

Ghollami, M; M, Roayaei; Ghavipanjeh, Farideh; Rasekh, Behnam

doi:10.4172/2157-7463.1000139

Cited by 2 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Resins and asphaltenes play a major role in shaping the colloidal nature of heavy oils; hence, the industry's interest in these heavy oil fractions in particular [10]. Resins and asphaltenes contain numerous heteroatoms as they usually encompass 30-60% of the total sulphur, 70-90% of total nitrogen and 80-90% of the total vanadium and nickel present in a crude oil [11]. Asphaltenes are the heaviest and most polar components of petroleum fluids [12,13].…”

Section: Crude Oil: Composition Properties and Definitionmentioning

confidence: 99%

Bioremediation of Heavy Crude Oil Contamination

Al-Sayegh

Al-Wahaibi

Joshi³

et al. 2016

TOBIOTJ

View full text Add to dashboard Cite

Crude oil contamination is one of the major environmental concerns and it has drawn interest from researchers and industries. Heavy oils contain 24-64% saturates and aromatics, 14-39% resins and 11-45% asphaltene. Resins and asphaltenes mainly consist of naphthenic aromatic hydrocarbons with alicyclic chains which are the hardest to degrade. Crude oil biodegradation process, with its minimal energy need and environmentally friendly approach, presents an opportunity for bioremediation and as well for enhanced oil recovery to utilize heavy oil resources in an efficient manner. Biodegradation entails crude oil utilization as a carbon source for microorganisms that in turn change the physical properties of heavy crude oil by oxidizing aromatic rings, chelating metals and severing internal bonds/chains between molecules. Biodegradation does not necessarily lower quality of crude oil as there are cases where quality was improved. This paper provides information on heavy crude oil chemistry, bioremediation concept, biodegradation enzymes, cases of Microbial Enhanced heavy crude Oil Recovery (MEOR) and screening criteria towards a better understanding of the biodegradation application. Through the utilization of single microorganisms and consortia, researchers were able to biodegrade single pure hydrocarbon components, transform heavy crude oil fractions to lighter fractions, remove heavy metals and reduce viscosity of crude oil.

show abstract

Section: Crude Oil: Composition Properties and Definitionmentioning

confidence: 99%

Bioremediation of Heavy Crude Oil Contamination

Al-Sayegh

Al-Wahaibi

Joshi³

et al. 2016

TOBIOTJ

View full text Add to dashboard Cite

show abstract

Isolation and identification of the same type LMG1242 of biosurfactant-producing strain of Pseudomonas aeruginosa from different oil contaminated soils

Ghavipanjeh

Moradi

2019

APJMBB

View full text Add to dashboard Cite

Emulsification is a major rate limiting step in any biological conversion of heavy hydrocarbons. Here, thirty bacterial strains were isolated from seven native consortia and screened for biosurfactantproducing activities which could enhance emulsification of heavy oils. The consortia were obtained by sampling from oil contaminated soils of different petroleum refineries of Iran. The oil spreading test, drop collapse test, emulsification index (E24) and surface tension measurements were used to evaluate the biosurfactant producing activities of the strains. A total number of 5 strains out of 30 were finally selected as the best biosurfactant-producing bacteria. The clear zone diameters in their oil spreading test were 4 to 5 cm, and E24 were 48 to 92%. The selected strains also properly lowered the surface tensions of the supernatants to 23.5-32 mN/m when grown on heavy diesel. All the selected strains were identified by 16S rRNA sequencing analysis as Pseudomonas aeruginosa LMG1242 (99.9% homology) which is a newly isolated type in oil polluted soils. The results suggest P. aeruginosa LMG1242 as a predominant and highly active biosurfactant producing bacterium which could be further evaluated in petroleum bioremediation and bioprocessing applications.

show abstract

Bioconversion of Heavy Hydrocarbon Cuts Containing High Amounts of Resins by Microbial Consortia

Cited by 2 publications

References 15 publications

Bioremediation of Heavy Crude Oil Contamination

Bioremediation of Heavy Crude Oil Contamination

Isolation and identification of the same type LMG1242 of biosurfactant-producing strain of Pseudomonas aeruginosa from different oil contaminated soils

Contact Info

Product

Resources

About