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	Application of Bacillus subtilis strain for microbial-enhanced oil recovery
	Xu, Haiyan1,2; Wang, Huanjiang1,2; Jia, Weihong1,2; Ren, Sili3; Wang, Jinqing1,2
刊名	INTERNATIONAL JOURNAL OF GREEN ENERGY
	2019-05-28
卷号	16期号:7页码:530-539
关键词	Microbial enhanced oil recovery Bacillus subtilis biosurfactants emulsification degradation
ISSN号	1543-5075
DOI	10.1080/15435075.2019.1598416
通讯作者	Ren, Sili(sili_ren@163.com) ; Wang, Jinqing(jqwang@licp.cas.cn)
英文摘要	In order to improve the oil recovery, injection of exogenous bacteria into the oil reservoir is one of the most widely used microbial flooding methods. In this study, a screened strain of Bacillus subtilis (B. subtilis) was introduced to perform the microbial flooding. The biosurfactants produced by B. subtilis was one kind of cyclic lipopeptides, which could reduce the surface tension of the culture solution from 68 mN/m to 25 mN/m and also decrease the interfacial tension of water/oil from 25.6 to 4.6 mN/m. Emulsification tests indicated that the strain and the biosurfactants could degrade and emulsify the crude oil. In the oil displacement experiments, oil recovery was increased by 32.4% by injecting fermentation broth into the simulated formation. By respectively performing the emulsification and oil displacement tests, it was demonstrated that the biosurfactants and degradation of the microbes in the heavy components of the crude oil are the main factors to enhance the oil recovery. Besides, the optimal cultural temperature for strain of B. subtilis was set as 40 degrees C. Nevertheless, the strain was inappropriate for the oil displacement under acidic conditions. In addition, the hydrophilic sands and an optimal culture solution volume of 0.7 pore volume (PV) would be in favor of the oil recovery. It was further confirmed that the efficiency of microbial flooding was much higher than that of the chemical oil displacement.
收录类别	SCI
WOS关键词	BIOSURFACTANT PRODUCTION ; MICROORGANISMS ; NANOPARTICLES ; OPTIMIZATION ; TECHNOLOGY ; SURFACTIN ; STABILITY
WOS研究方向	Thermodynamics ; Science & Technology - Other Topics ; Energy & Fuels
WOS类目	Thermodynamics ; Green & Sustainable Science & Technology ; Energy & Fuels
语种	英语
出版者	TAYLOR & FRANCIS INC
WOS记录号	WOS:000463912500003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555490
专题	寒区旱区环境与工程研究所
通讯作者	Ren, Sili; Wang, Jinqing
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China 3.Jiangxi Univ Sci & Technol, Sch Resources & Environm Engn, Ganzhou, Peoples R China
推荐引用方式 GB/T 7714	Xu, Haiyan,Wang, Huanjiang,Jia, Weihong,et al. Application of Bacillus subtilis strain for microbial-enhanced oil recovery[J]. INTERNATIONAL JOURNAL OF GREEN ENERGY,2019,16(7):530-539.
APA	Xu, Haiyan,Wang, Huanjiang,Jia, Weihong,Ren, Sili,&Wang, Jinqing.(2019).Application of Bacillus subtilis strain for microbial-enhanced oil recovery.INTERNATIONAL JOURNAL OF GREEN ENERGY,16(7),530-539.
MLA	Xu, Haiyan,et al."Application of Bacillus subtilis strain for microbial-enhanced oil recovery".INTERNATIONAL JOURNAL OF GREEN ENERGY 16.7(2019):530-539.

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