Biodegradation of crude oil by Chelatococcus daeguensis HB-4 and its potential for microbial enhanced oil recovery (MEOR) in heavy oil reservoirs

Ke, Cong‐Yu; Lu, Gui; Wei, Ying‐Lin; Sun, Wu‐Juan; Hui, Junfeng; Zheng, Xiaoyan; Zhang, Qun-Zheng; Zhang, Xun‐Li

doi:10.1016/j.biortech.2019.121442

Cited by 40 publications

(15 citation statements)

References 42 publications

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“…Degradation of heavy fractions is considered one of the main mechanisms of MEOR by which the oil's viscosity and freezing point are reduced, which in turn will increase the oil's mobility in situ 38 . Numerous functional microbes, such as members of Petrobacter , Enterobacter , Bacillus , and Geobacillus , can produce highly degradative enzymes, resulting in the breakdown of hydrocarbon chains, making them lighter and enhancing oil mobility 39,40 .…”

Section: Resultsmentioning

confidence: 99%

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Biodegradation of heavy oil by fungal extracellular enzymes fromAspergillusspp. shows potential to enhance oil recovery

et al. 2021

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Microbial enhanced oil recovery makes a substantial contribution to the recovery of heavy oils; however, most methods use bacteria, with less attention paid to the potential of fungi. In this study, we investigated the efficiency of fungal extracellular enzymes in biotransformation of heavy oil fractions into light compounds. Two Aspergillus isolates (A. terreus and A. nidulans) with the ability to biodegrade heavy oil were isolated from bitumen. The extracellular enzymes from these Aspergillus isolates exhibited dehydrogenase and catechol 2,3‐dioxygenase activities. The biodegradation of heavy oil was coupled with abundant production of gases, mainly CO2 and H2. Gas chromatography analysis revealed a redistribution of n‐alkanes in heavy oil after treatment with crude enzyme extracts, which resulted in an increase in individual n‐alkanes. The viscosity of heavy oil was decreased considerably by enzymatic degradation. These results demonstrate the potential of fungal extracellular enzymes from Aspergillus spp. for applications in enhanced heavy oil recovery.

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Section: Resultsmentioning

confidence: 99%

“…The reduction of crude oil viscosity can be attributed to the degradation of long chain n ‐alkanes 28,38 . Luo et al 42 reported that Pseudomonas sp.…”

Section: Resultsmentioning

confidence: 99%

Biodegradation of heavy oil by fungal extracellular enzymes fromAspergillusspp. shows potential to enhance oil recovery

et al. 2021

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“…Microbial enhanced oil recovery was first proposed by Beckman (1926), but this technology was slowly developed during a long period of time due to the limits of science and technology (Brown, 2010). As a key point of MEOR, the finding of proper microorganisms had attracted a lot of concentrations and many bacteria strains were isolated and characterized in laboratory (Al-Wahaibi et al, 2014;Fernandes et al, 2016;Zhang et al, 2016;Ke et al, 2019). The field tests were important for MEOR from laboratory experiments to industry application.…”

Section: Potential Ability Of Strain A-8 In Meormentioning

confidence: 99%

“…To date, numerous bacterial strains that can degrade petroleum or produce biosurfactant have been isolated from different oil-contaminated environments worldwide. Such strains include Chelatococcus daeguensis HB-4 from Baolige Oilfield in China (Ke et al, 2019), Rhodococcus erythropolis OSDS1 isolated from a solid waste management unit (SWMU) contaminated with petroleum hydrocarbons and heavy metals in the United States (Xia et al, 2019), Bacillus subtilis RI4914 from an oil field in Brazil (Fernandes et al, 2016), Bacillus licheniformis from oil-contaminated water samples in Egypt (El-Sheshtawy et al, 2015), Pseudomonas putida DB1 and Bacillus cereus DB2 isolated from petroleumcontaminated soil in India (Vinothini et al, 2015), and B. subtilis B30 from oil-contaminated soils in Oman (Al-Wahaibi et al, 2014). As an important part of MEOR and bioremediation, biosurfactant-producing strains have been studied under different conditions (e.g., pH, temperature, salinity, and nutrition) to find the optimal conditions for biosurfactant production.…”

Section: Introductionmentioning

confidence: 99%

One Biosurfactant-Producing Bacteria Achromobacter sp. A-8 and Its Potential Use in Microbial Enhanced Oil Recovery and Bioremediation

et al. 2020

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“…Thus, bioremediation has been introduced and received a great deal of attention as an economical, environmentally friendly technique that is suitable for many situations (Harayama et al, 2004). Since bioremediation was introduced to deplete crude oil contamination, many microorganisms have been confirmed to degrade crude oil (Adams et al, 2015;Vinothini et al, 2015;Zhang et al, 2016;Ke et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Petroleum Depletion Property and Microbial Community Shift After Bioremediation Using Bacillus halotolerans T-04 and Bacillus cereus 1-1

et al. 2020

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Bioremediation of crude oil contaminated environments is an economical, lowmaintenance, environmentally friendly technology and has attracted increasing attention in recent years. In the present study, two efficient crude oil degrading bacteria strains were isolated from soils contaminated with crude oil. Phylogenetic analysis suggested they belonged to genus Bacillus, and were designated as Bacillus cereus T-04 and Bacillus halotolerans 1-1. The crude oil depletion of each strain under different conditions was tested. The optimum conditions for both strains' oil degradation was pH 7, 15-20 g/L NaCl concentration, and 5-15 g/L original oil concentration. The crude oil depletion rate could reach to 60-80% after 20 days of treatment. The crude oil bioremediation simulation tests revealed that the bioremediation promoted the depletion of crude oil to a large extent. The inoculum group with inorganic medium showed the highest crude oil depletion (97.5%) while the crude oil depletion of control group was only 26.6% after 180 days of treatment. High-throughput sequencing was used to monitor the changes of microbial community using different treatments. In all groups, Actinobacteria, Proteobacteria, Firmicutes and Bacteroidetes were the dominant phyla. After contaminated with crude oil, the relative abundance of phylum Actinobacteria was dramatically increased and occupied 81.8%. Meanwhile although strains of Bacillus were added in the bioaugmentation groups, the relative abundance of genus Bacillus was not the most abundant genus at the end of simulation tests. The crude oil contamination dramatically decreased the soil microbial diversity and bioremediation could not recover the microbial community in the short term.

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Biodegradation of crude oil by Chelatococcus daeguensis HB-4 and its potential for microbial enhanced oil recovery (MEOR) in heavy oil reservoirs

Cited by 40 publications

References 42 publications

Biodegradation of heavy oil by fungal extracellular enzymes fromAspergillusspp. shows potential to enhance oil recovery

Biodegradation of heavy oil by fungal extracellular enzymes fromAspergillusspp. shows potential to enhance oil recovery

One Biosurfactant-Producing Bacteria Achromobacter sp. A-8 and Its Potential Use in Microbial Enhanced Oil Recovery and Bioremediation

Petroleum Depletion Property and Microbial Community Shift After Bioremediation Using Bacillus halotolerans T-04 and Bacillus cereus 1-1

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