Degradation of Asphaltenic Fraction by Locally Isolated Halotolerant Bacterial Strains

Ali, Hager R.; El‐Gendy, Nour Sh.; Moustafa, Yasser M.; Roushdy, Mohamed; Hashem, Ahmed I.

doi:10.5402/2012/435485

Cited by 26 publications

(14 citation statements)

References 33 publications

(29 reference statements)

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“…Many of petroleum compounds are highly toxic for living organisms . Asphaltene fractions contain sulfur, oxygen, nitrogen, and small amounts of metal elements, such as Fe, Ni, and V . Aromatic rings, acyclic, and heterocyclic structures are usually bonded to aliphatic hydrocarbons in asphaltene molecules.…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of asphaltene and petroleum compounds by a highly potent Daedaleopsis sp.

et al. 2018

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Petroleum, as the major energy source, is indispensable from our lives. Presence of compounds resistant to degradation can pose risks for human health and environment. Basidiomycetes have been considered as powerful candidates in biodegradation of petroleum compounds via secreting ligninolytic enzymes. In this study a wood-decaying fungus was isolated by significant degradation ability that was identified as Daedaleopsis sp. by morphological and molecular identification methods. According to GC/MS studies, incubation of heavy crude oil with Daedaleopsis sp. resulted in increased amounts of C24 compounds. Degradation of asphaltene, anthracene, and dibenzofuran by the identified fungal strain was determined to evaluate its potential in biodegradation. After 14 days of incubation, Daedaleopsis sp. could degrade 93.7% and 91.2% of anthracene and dibenzofuran, respectively, in pH 5 and 40 °C in optimized medium, as revealed by GC/FID. Notably, analysis of saturates, aromatics, resins, and asphaltenes showed a reduction of 88.7% and 38% in asphaletene and aromatic fractions. Laccase, lignin peroxidase, and manganese peroxidase activities were enhanced from 51.3, 145.2, 214.5 U ml in the absence to 121.5, 231.4, and 352.5 U ml in the presence of heavy crude oil, respectively. This is the first report that Daedaleopsis sp. can degrade asphaltene and dibenzofuran. Moreover, compared to the reported results of asphaltene biodegradation, this strain was the most successful. Thus, Daedaleopsis sp. could be a promising candidate for biotransformation of heavy crude oil and biodegradation of recalcitrant toxic compounds.

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Section: Introductionmentioning

confidence: 99%

“…elements, such as Fe, Ni, and V [3,4]. Aromatic rings, acyclic, and heterocyclic structures are usually bonded to aliphatic hydrocarbons in asphaltene molecules.…”

mentioning

confidence: 99%

Biodegradation of asphaltene and petroleum compounds by a highly potent Daedaleopsis sp.

et al. 2018

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“…During biodegradation and biotransformation processes, microorganisms could produce more than one bioproduct to facilitate crude oil viscosity reduction [ 10 ], wherein employing more than one bacterial strain could enhance biodegradation even further [ 11 ]. Even toxic asphalt and aromatics compounds are subject to biodegradation [ 12 – 14 ]. Generally, microbial growth on hydrocarbons under anaerobic conditions is considerably slower in comparison with aerobic conditions [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Microbial enhanced heavy crude oil recovery through biodegradation using bacterial isolates from an Omani oil field

et al. 2015

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BackgroundBiodegradation is a cheap and environmentally friendly process that could breakdown and utilizes heavy crude oil (HCO) resources. Numerous bacteria are able to grow using hydrocarbons as a carbon source; however, bacteria that are able to grow using HCO hydrocarbons are limited. In this study, HCO degrading bacteria were isolated from an Omani heavy crude oil field. They were then identified and assessed for their biodegradation and biotransformation abilities under aerobic and anaerobic conditions.ResultsBacteria were grown in five different minimum salts media. The isolates were identified by MALDI biotyper and 16S rRNA sequencing. The nucleotide sequences were submitted to GenBank (NCBI) database. The bacteria were identified as Bacillus subtilis and B. licheniformis. To assess microbial growth and biodegradation of HCO by well-assay on agar plates, samples were collected at different intervals. The HCO biodegradation and biotransformation were determined using GC-FID, which showed direct correlation of microbial growth with an increased biotransformation of light hydrocarbons (C12 and C14). Among the isolates, B. licheniformis AS5 was the most efficient isolate in biodegradation and biotransformation of the HCO. Therefore, isolate AS5 was used for heavy crude oil recovery experiments, in core flooding experiments using Berea core plugs, where an additional 16 % of oil initially in place was recovered.ConclusionsThis is the first report from Oman for bacteria isolated from an oil field that were able to degrade and transform HCO to lighter components, illustrating the potential use in HCO recovery. The data suggested that biodegradation and biotransformation processes may lead to additional oil recovery from heavy oil fields, if bacteria are grown in suitable medium under optimum growth conditions.

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“…(CC) bond stretch was observed at 2100 cm -1 . Aliphatic group (CH) in CH 2 and CH 3 groups at 2900-2850 cm -1 and carbonyl group at 1650-1850 cm -1 were indicated (Ali et al, 2012). Regarding sample control, the variation in bond shape, width and peaks intensity were found in all bonds after larvae consumption.…”

Section: Ftir Analysismentioning

confidence: 89%

Biodegradation of plastic wastes by confused flour beetle Tribolium confusum Jacquelin du Val larvae

Abdulhay¹

2020

Asian J Agric Biol

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As a consequence of increasing the production of plastics which accumulate substantial quantities of plastic wastes in the natural environment and in landfills that could persist for centuries. The ability of confused flour beetle Tribolium confusum larvae to consume and biodegrade different types of plastics were investigated. The experiment was performed by starving the larvae then exposed to three different types of plastic (polystyrene (PS), polyethylene foam (PE), and ethylene-vinyl acetate (EVA) as diet in comparison to larvae reared on the conventional diet of wheat flour. The larvae were monitored under controlled conditions then the survival rate, the mass losses for both larvae and plastics resulting from the diet on plastic as a function of time (1, 14, 21 and 30 days) were measured. The results showed that with the increase of time; the averages of larvae survival on all types of plastic were decreased compared with control. The highest larval survival rate was found in the PS diet (70%), while the least was with larvae fed on EVA (30%) after 30 days. Decreasing in the mass weight of the larvae was confirmed during the study, which indicates that plastic materials are not an efficient source of energy for larvae except their survival. The mass loss was 26.2, 31.4 and 45.8 % recorded for larvae fed on PS, PE, and EVA respectively. The study recorded that T. confusum has the ability to degradation plastic, which can reduce the pollution caused by different types of plastic wastes.

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Degradation of Asphaltenic Fraction by Locally Isolated Halotolerant Bacterial Strains

Cited by 26 publications

References 33 publications

Biodegradation of asphaltene and petroleum compounds by a highly potent Daedaleopsis sp.

Biodegradation of asphaltene and petroleum compounds by a highly potent Daedaleopsis sp.

Microbial enhanced heavy crude oil recovery through biodegradation using bacterial isolates from an Omani oil field

Biodegradation of plastic wastes by confused flour beetle Tribolium confusum Jacquelin du Val larvae

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