Piezo-tolerant natural gas-producing microbes under accumulating pCO₂.

ABSTRACT:

Background

It is known that a part of natural gas is produced by biogenic degradation of organic matter, but the microbial pathways resulting in the formation of pressurized gas fields remain unknown. Autogeneration of biogas pressure of up to 20 bar has been shown to improve the quality of biogas to the level of biogenic natural gas as the fraction of CO₂ decreased. Still, the pCO₂ is higher compared to atmospheric digestion and this may affect the process in several ways. In this work, we investigated the effect of elevated pCO₂ of up to 0.5 MPa on Gibbs free energy, microbial community composition and substrate utilization kinetics in autogenerative high-pressure digestion.

Results

In this study, biogas pressure (up to 2.0 MP

SUBMITTER: Lindeboom REF 

PROVIDER: S-EPMC5097443 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature