Recovery of direct CO2 emissions (from methanization)
CO2 reuse from anaerobic digestion

The CO ₂ emissions concerned in the remainder of this article are those from off-gas purge gases (shown as (3) in figure 7 ). They are derived from biogas (composed of 35 to 50% CO ₂ by volume) generated by methanization and result, after purification, in an effluent composed of 90 to 99% CO ₂ of biogenic origin and 1 to 5% methane.

In order to be valorized, CO ₂ must pass through...