Printing a habitat out of algae

The problem with mining regolith

Nearly every study of 3D printed habitation on the Moon and Mars starts from the same assumption: the printer is fed with mined regolith. Regolith is there, it is free, and it shields against radiation.

What it is not is ready. Regolith-derived filler needs site-specific processing before anything can be printed with it, which means mining equipment, sifting equipment and the power and crew time to run both, all landed before the first wall goes up.

Growing the binder instead

This paper proposes a different feedstock: a printed mixture of algae and regolith. Algae grown in situ is a controlled biological medium, cultivated in a laboratory rather than dug out of the ground, so it arrives at the printer in a known state.

Algae biomass is high in protein and has natural thermoplastic qualities that allow it to be processed into biopolymers. The same cultivation yields more than a binder: food, consumables, even clothing, with local environmental benefits inside the habitat.

The practical argument is mass. Printing pressurized structures from a grown binder avoids shipping heavy mining infrastructure, tools and clothing from Earth.

Honest about the difficulty

The paper does not claim this is ready. It sets out the complications of algae production and processing, the infrastructure a bioreactor demands, and the open questions about decomposition and growth rate in Martian conditions.

The conclusion is a long-term one: algae is not a short-term solution, but it is the better approach for establishing permanent habitation on the Moon and Mars.

The paper was picked up outside the conference. JD Supra wrote it up for a legal and IP readership under the headline “Scientist Suggests Algae-Based 3D Printing For Habitation Structures In Space”, and the idea has since been cited in work on bio-fabrication from regolith feedstocks.

Read the paper on ResearchGate →