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Microbial Activation of Bacillus subtilis-Immobilized Microgel Particles for Enhanced Oil Recovery

Title
Microbial Activation of Bacillus subtilis-Immobilized Microgel Particles for Enhanced Oil Recovery
Author
김진웅
Keywords
BIOSURFACTANT PRODUCTION; HYDROGEL MICROPARTICLES; OPTIMIZATION; SURFACTANTS; SHELLS; FABRICATION; BACTERIA; RELEASE
Issue Date
2016-09
Publisher
AMER CHEMICAL SOC
Citation
LANGMUIR, v. 32, NO. 35, Page. 8909-8915
Abstract
Microbially enhanced oil recovery involves the use of microorganisms to extract oil remaining in reservoirs. Here, we report fabrication of microgel particles with immobilized Bacillus subtilis for application to microbially enhanced oil recovery. Using B. subtilis isolated from oil-contaminated soils in Myanmar, we evaluated the ability of this microbe to reduce the interfacial tension at the oil water interface via production of biosurfactant molecules, eventually yielding excellent emulsification across a broad range of the medium pH and ionic strength. To safely deliver B. subtilis into a permeable porous medium, in this study, these bacteria were physically immobilized in a hydrogel mesh of microgel particles. In a core flooding experiment, in which the microgel particles were injected into a column packed with silica beads, we found that these particles significantly increased oil recovery in a concentration-dependent manner. This result shows that a mesh of microgel particles encapsulating biosurfactant-producing microorganisms holds promise for recovery of oil from porous media.
URI
https://pubs.acs.org/doi/10.1021/acs.langmuir.6b02010http://repository.hanyang.ac.kr/handle/20.500.11754/80351
ISSN
0743-7463
DOI
10.1021/acs.langmuir.6b02010
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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