Things from the tour:

• starts off with bag splitters
• disc sorters to separate cardboard and paper out
• manual sorting to get as much plastic film out as possible, it clogs up the machines
• magnet sorter to get the aluminium cans outs (kind of looks like jumping salmon)
• optical sorter uses some kind of visual recognition and little jets of air to separate out plastic bottles

Everything is separated out into separate materials, and baled up before being sent (for cash) somewhere to use.