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Colorado company is building its own WALL-E as it reimagines trash disposal, recycling in outer space

Two men hold a trash compactor on display in front of a sign that reads "Welcome to Sierra Space."
Sierra Space
Joe Klopotic (left), a senior mechanical engineer at Sierra Space, next to the Trash Compaction and Processing System, a technology developed by the Louisville company to help astronauts on the International Space Station reduce the volume of trash that needs to be stored. The TCPS can compress trash to one-quarter of its volume, remove all liquid, and create a 11-inch square "tile" that is odor free and easier to store or use as radiation protection. On the right, TCPS program manager John Wetzel holds up a tile. The contraption is expected to board the space station in 2026.

Space may be the final frontier but even NASA has a “leave no trace” mentality when it comes to camping in the cosmos.

The space agency the next stage of Sierra Space’s trash compactor that aims to cut down on garbage on the International Space Station. If all goes as planned, the Louisville space company’s contraption will board the ISS in 2026 to help reduce the volume of and potentially find new uses for the waste.

NASA’s approach to trash has been years in the making. Space debris from broken satellites or tends to receive more attention when it comes to cosmic clutter. And that’s still a work in progress that other companies and researchers are trying to resolve. But NASA also doesn’t want to just dump space station waste into space, though they’ve tried . The current disposal method is for trash to hitch a ride and burn up with the next .

Sierra’s compactor could really change things, and the company aims to go beyond the space station mission by adding reclamation and recycling. The contraption compresses everyday trash, like used cleaning wipes, plastic packaging, food leftovers and other raw garbage, into solid square tiles — a 75% reduction in volume. Water and gases are removed for later reclamation. The tiles are easier to store on board and could someday be used as an extra layer of radiation protection for space habitats on the moon or Mars.

“Part of the goal of this is exploration missions,” said John Wetzel, program manager for Sierra’s Trash Compaction and Processing System, or TCPS. “It becomes really critical when you’re heading to Mars for a couple of years to store that trash. This is a 4-to-1 compression ratio so it’s a lot smaller and then you can recover the water, which is really important when you go on a long-duration mission. We’re also looking at using this not only on the space station but future stations in orbit.”

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