Closely held Air Company of Brooklyn has pioneered a way of recycling carbon dioxide exhaled by astronauts in flight to grow yeast-based nutrients for protein shakes
“It’s definitely more nutritious than Tang,” said company co-founder and Chief Technology Officer Stafford Sheehan, referring to the powdered beverage popularized in 1962 by John Glenn when he became the first American to orbit Earth.
The resulting single-cell protein drink entered in NASA’s contest has the consistency of a whey protein shake, Sheehan said. Sheehan compared its flavour with that of seitan, a tofu-like food made from wheat gluten that originated in East Asian cuisine and has been adopted by vegetarians as a meat substitute.Apart from protein drinks, the same process can be used to create more carbohydrate-heavy substitutes for breads, pastas and tortillas.
Up to $1.5-million in prize money will be divvied up among the eventual final winners of the contest. “That was taking an idea to an extreme for a Hollywood movie,” said Ralph Fritsche, space crop production manager at NASA’s Kennedy Space Center in Florida, adding that human waste alone “is not the complete nutrient source that plants need to grow and thrive.”
But the imperative for self-contained, low-waste food production requiring minimal resources has become more pronounced as NASA sets its sights on returning astronauts to the moon and eventual human exploration of Mars and beyond.
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