Under the AsH2Gas project, together with a research group, organic waste materials were gasified into syngas comprising H2, CO, CO2 and CH4. We could demonstrate that all substances (H2, CO and CO2) were transformed into methane. Thanks to our more than 70 strains of archaea, we had suitable organisms for this process. Until then, biological methanation of CO had not been proven. MicroPyros was the first to demonstrate biological methanation of CO is possible.