We here present a promising technology for solving one of the most dominating issues of cost for carbon capture and utilization. Substituting the energy-demanding process of desorbing the CO2 with a microbial system, we are able to both release and convert captured CO2 to biomethane in a single step following its capture from dilute sources like flue gas. Linking traditional amine scrubbers with archaeal biomethanation hereby allows for cost-efficient CO2 capture and conversion of flue gas CO2. As a proof of concept, multiple bench-scaled batch reactors were operated at various MDEA amine concentrations from 0 -500 mM to screen for the microbial conversion rates, the bioavailability of the absorbed CO2 and the toxicity of raw flue gas. The research demonstrated successful biomethanation of MDEA amine absorbed CO2 from both synthetic flue gas and raw flue gas from a biogas engine and revealed a high robustness of the microbial