Effect of CO 2 on biogeochemical reactions and microbial community composition in bioreactors with deep groundwater and basalt

Changes in subsurface microbiology following CO injection have the potential to impact carbon trapping in CO storage reservoirs. However, much remains to be learned about responses of natural microbial consortia to elevated CO in basaltic systems. This study asks: how will microbes from deep (700 m)...

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Bibliographic Details
Published in:The Science of the total environment 2022-02, Vol.807 (Pt 2), p.150803
Main Authors: Choi, Byoung-Young, Park, Jinyoung, Ham, Baknoon, Kirk, Matthew F, Kwon, Man Jae
Format: Article
Language:English
Subjects:
Bioreactors
Carbon Dioxide
Groundwater
Microbiota
Silicates
Online Access:Get full text
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Summary:Changes in subsurface microbiology following CO injection have the potential to impact carbon trapping in CO storage reservoirs. However, much remains to be learned about responses of natural microbial consortia to elevated CO in basaltic systems. This study asks: how will microbes from deep (700 m) groundwater change along a gradient in CO (0-20 psi) in batch reactor systems containing basalt chips and groundwater amended with lactate? Reactors incubated for 87 days at 23 °C. Results for reactors with low CO (0 and 3 psi) differed considerably from those with high CO (10 and 20 psi). In reactors with low CO , pH was >6.5 and lactate started to be used within 24 days. By 40 days, lactate was completely consumed and acetate increased to ~4 mM. As lactate was consumed, sulfate decreased from 0.16 to 0 mM after 40 days. In contrast, in reactors with high CO , pH was
ISSN:1879-1026