Researchers at NASA's Kennedy Space Center in Florida are evaluating small tiles made of rubbish generated on spacecraft to find out whether they can be stored aboard spacecraft safely or even used for radiation shielding during a deep space mission.
The circular tiles were produced by a compactor that melts the waste but doesn't incinerate it. The compacted tile is about 20 cm in diameter and about 1 cm thick. Research is ongoing to understand if the melting process sterilises bacteria.
The bigger picture is the thinking required to make a resource of garbage in space. Given NASA does not want to jettison waste in space, potentially contaminating planets or a moon, a very tight focus on the saying "there is no away" is required.