AI Article Synopsis
- The study evaluated three different inhibitors on microorganisms from Archaea and Bacteria to see their impact on CO biomethanation during biogas upgrading.
- Both ETH2120 and CO promoted methane production when added, while BES did not, indicating that archaea in the mix were inactive without the first two.
- Although acetate was produced in all conditions, higher levels of CO reduced acetate output while boosting methane production, suggesting intricate interactions within the complex microbial community.
Article Abstract
Three inhibitors targeting different microorganisms, both from Archaea and Bacteria domains, were evaluated for their effect on CO biomethanation: sodium ionophore III (ETH2120), carbon monoxide (CO), and sodium 2-bromoethanesulfonate (BES). This study examines how these compounds affect the anaerobic digestion microbiome in a biogas upgrading process. While archaea were observed in all experiments, methane was produced only when adding ETH2120 or CO, not when adding BES, suggesting archaea were in an inactivated state. Methane was produced mainly via methylotrophic methanogenesis from methylamines. Acetate was produced at all conditions, but a slight reduction on acetate production (along with an enhancement on CH production) was observed when applying 20 kPa of CO. Effects on CO biomethanation were difficult to observe since the inoculum used was from a real biogas upgrading reactor, being this a complex environmental sample. Nevertheless, it must be mentioned that all compounds had effects on the microbial community composition.
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| http://dx.doi.org/10.1016/j.biortech.2023.128922 | DOI Listing |
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