Performance Analysis and Microbial Community Evolution of In Situ Biological Biogas Upgrading with Increasing H₂/CO₂ Ratio.

ABSTRACT: The effect of the amount of hydrogen supplied for the in situ biological biogas upgrading was investigated by monitoring the process and evolution of the microbial community. Two parallel reactors, operated at 37°C for 211 days, were continuously fed with sewage sludge at a constant organic loading rate of 1.5 gCOD∙(L∙d)^-1 and hydrogen (H₂). The molar ratio of H₂/CO₂ was progressively increased from 0.5 : 1 to 7 : 1 to convert carbon dioxide (CO₂) into biomethane via hydrogenotrophic methanogenesis. Changes in the biogas composition become statistically different above the stoichiometric H₂/CO₂ ratio (4 : 1). At a H₂/CO₂ ratio of 7 : 1, the methane content in the biogas reached 90%, wi

SUBMITTER: Corbellini V 

PROVIDER: S-EPMC7889367 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature