If you want to go down a tech click hike: look up pyrolysis videos. You break down polymers into monomers, in styrofoams case, styrene, which can be used as a fuel.
you can also turn styrene back into styrofoam and other plastics
chemical recycling is better than mechanical recycling because you don't have to worry about contamination as much, and you don't have to worry about polymers degrading because you're breaking them down and repolymerizing them anyway
of course, very few recycling plants do chemical recycling at scale because it's unprofitable
If you want to go down a tech click hike: look up pyrolysis videos. You break down polymers into monomers, in styrofoams case, styrene, which can be used as a fuel.
you can also turn styrene back into styrofoam and other plastics
chemical recycling is better than mechanical recycling because you don't have to worry about contamination as much, and you don't have to worry about polymers degrading because you're breaking them down and repolymerizing them anyway
of course, very few recycling plants do chemical recycling at scale because it's unprofitable