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Anaerobic digestion and CO2 separation with CCUS (biomethane)

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Technology Description

Similar to biomethane production from anaerobic digestion, with the addition of a CO2 capture and compression unit integrated into the CO2 separation inherent to biogas upgrading. If the CO2 is stored, negative emissions are created that can offset hard-to-abate emissions elsewhere in the energy system. Larger digestors (> 5 MW) are suitable for carbon capture and storage (CCS) to justify the additional capital expense. See non-CCUS variant for more detail.

Relevance for Net Zero

Alternative methods for biomethane production exist (e.g. biomass gasification and methanation), and the future demand for biomethane is limited.

Key Countries

Italy

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