Aluminum and steel are easy to extract from the waste stream, run the waste stream past a magnet to separate the ferrous metals, then run the waste stream past an eddy current separator to separate out the aluminum/copper/zinc.
Recycling household waste is dumb and a massive waste of resources. Burning the trash after extracting the metal would be optimal.
Recycling household waste is dumb and a massive waste of resources. Burning the trash after extracting the metal would be optimal.