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dc.contributor.authorBarnhart, Elliott P.
dc.contributor.authorWeeks, Edwin P.
dc.contributor.authorJones, Elizabeth J. P.
dc.contributor.authorRitter, Daniel J.
dc.contributor.authorMcIntosh, Jennifer C.
dc.contributor.authorClark, Arthur C.
dc.contributor.authorRuppert, Leslie F.
dc.contributor.authorCunningham, Alfred B.
dc.contributor.authorVinson, David S.
dc.contributor.authorOrem, William
dc.contributor.authorFields, Matthew W.
dc.date.accessioned2017-06-13T18:48:09Z
dc.date.available2017-06-13T18:48:09Z
dc.date.issued2016-05
dc.identifier.citationBarnhart, E. P., Weeks, E. P., Jones, E. J. P., Ritter, D. J., McIntosh, J. C., Clark, A. C., … Fields, M. W. (2016). Hydrogeochemistry and coal-associated bacterial populations from a methanogenic coal bed. International Journal of Coal Geology, 162, 14–26.en_US
dc.identifier.issn0166-5162
dc.identifier.urihttps://scholarworks.montana.edu/xmlui/handle/1/13056
dc.description.abstractBiogenic coalbed methane (CBM), a microbially-generated source of natural gas trapped within coal beds, is an important energy resource in many countries. Specific bacterial populations and enzymes involved in coal degradation, the potential rate-limiting step of CBM formation, are relatively unknown. The U.S. Geological Survey (USGS) has established a field site, (Birney test site), in an undeveloped area of the Powder River Basin (PRB), with four wells completed in the Flowers-Goodale coal bed, one in the overlying sandstone formation, and four in overlying and underlying coal beds (Knoblach, Nance, and Terret). The nine wells were positioned to characterize the hydraulic conductivity of the Flowers-Goodale coal bed and were selectively cored to investigate the hydrogeochemistry and microbiology associated with CBM production at the Birney test site. Aquifer-test results indicated the Flowers-Goodale coal bed, in a zone from about 112 to 120 m below land surface at the test site, had very low hydraulic conductivity (0.005 m/d) compared to other PRB coal beds examined. Consistent with microbial methanogenesis, groundwater in the coal bed and overlying sandstone contain dissolved methane (46 mg/L average) with low δ13C values (− 67‰ average), high alkalinity values (22 meq/kg average), relatively positive δ13C-DIC values (4‰ average), and no detectable higher chain hydrocarbons, NO3−, or SO42 −. Bioassay methane production was greatest at the upper interface of the Flowers-Goodale coal bed near the overlying sandstone. Pyrotag analysis identified Aeribacillus as a dominant in situ bacterial community member in the coal near the sandstone and statistical analysis indicated Actinobacteria predominated coal core samples compared to claystone or sandstone cores. These bacteria, which previously have been correlated with hydrocarbon-containing environments such as oil reservoirs, have demonstrated the ability to produce biosurfactants to break down hydrocarbons. Identifying microorganisms involved in coal degradation and the hydrogeochemical conditions that promote their activity is crucial to understanding and improving in situ CBM production.en_US
dc.titleHydrogeochemistry and coal-associated bacterial populations from a methanogenic coal beden_US
dc.typeArticleen_US
mus.citation.extentfirstpage14en_US
mus.citation.extentlastpage26en_US
mus.citation.journaltitleInternational Journal of Coal Geologyen_US
mus.citation.volume162en_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.identifier.doi10.1016/j.coal.2016.05.001en_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentMicrobiology & Immunology.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.data.thumbpage23en_US
mus.contributor.orcidFields, Matthew W.|0000-0001-9053-1849en_US


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