Electrochaea is contributing its patented process to the local "Infinity-1" project. The goal is to cover Pfaffenhofen's entire electricity needs with self-generated electricity from renewable energy sources.
The Munich-based cleantech startup's power-to-gas process converts excess electricity from renewable energy sources into biomethane. The gas can then be used later. In addition, CO2 from the municipal sewage treatment plant is captured during biomethane production. The Electrochaea plant is just one component of the project. Overall, local CO2 emissions per capita per year are to be halved from six to three tons by 2030. Mich Hein, Managing Director at Electrochaea, says:
"Pfaffenhofen is a very good example of how different technologies can be networked to enable a clean and secure energy supply on a grid scale. We hope that other cities and municipalities will implement similar energy concepts. Pfaffenhofen shows that it's possible."
Electrochaea bacteria can be switched on and off as needed
For its process, Electrochaea uses prehistoric microorganisms, so-called archaea, which convert electricity into methane. Because these microorganisms are very robust, the biological power-to-gas reactors can be switched on and off by removing hydrogen and CO2—depending on demand and energy availability. The patented process thus helps stabilize the power grid during periods of abundant wind and sunshine. Similar plants based on Electrochaea's technology are already operating in Denmark and the USA.
