The 'photoelectrochemical' system in the reactor is capable of splitting water molecules into hydrogen and oxygen, and uses the hydrogen together with carbon dioxide to create methane. Since the greywater would also be detoxified in the process, the system would double as a waste recycling method.

"This activity represents a significant leap forward in space exploration and sustainable carbon dioxide conversion technologies," explains Elena Garcia, Tekniker's lead for the project. "Unlike prior technologies, our reactor addresses both carbon dioxide reduction and greywater treatment simultaneously, enhancing sustainable mission planning."

The HISRU project ('Photoelectrochemical system for CO₂ reduction to produce fuels and sewage treatment') was submitted through the Open Space Innovation Platform (OSIP) and implemented by the Discovery element of ESA's Basic Activities.