Scientists Turn Plastic Waste Into Food for Space Travel

Scientists have turned one of our biggest environmental problems into a solution for feeding astronauts on long space missions.

Dr. Lahiru Jayakody and his team at Southern Illinois University Carbondale successfully created cookies from recycled plastic bottles. The project, funded by NASA's Deep Space Food Challenge, aims to help astronauts survive three-year round trips to Mars.

The process sounds like science fiction but uses simple chemistry. Researchers break down polyethylene terephthalate (PET), the plastic in single-use water bottles, using water and oxygen at high temperatures. Those smaller molecules then feed specially designed yeasts that convert plastic carbon into proteins, fats, and other nutrients.

The team adds starch to the nutrient slurry and shapes it into disc-shaped cookies using a 3D printer. They even created a separate yeast strain that produces vanilla flavoring from plant waste. The cookies reportedly smell delicious, though the team still awaits approval to taste them.

Right now, producing these cookies costs $60 per kilogram. Jayakody expects that price to drop significantly as they improve the yeast's efficiency and scale up production.

Why This Inspires

This innovation addresses two massive global challenges at once. By 2050, food demand will jump 35% to 56%, leaving 30% of the world population at risk of hunger. At the same time, plastic waste continues choking our oceans and landfills.

Jayakody believes microbes hold the key to feeding our growing population sustainably. Beyond space travel, this technology could provide nutrition in submarines, disaster zones, or anywhere traditional food supply chains break down.

The concept might take some getting used to. Most people need time to embrace the idea of eating plastic-derived food. But the team points out something profound: plastic is just carbon, and so is food.

NASA astronauts facing three years in space will need to reuse everything they have. This technology turns waste into survival, transforming trash into nutrition when resupply missions aren't possible.

The breakthrough proves that creative thinking can flip problems into solutions, whether we're exploring Mars or protecting Earth.