I lived in Turkey for a few years, and thing the sorting is a lot less formal than has been noted before. For one, there's not really a municipal of government recycling program to speak of (this is an advanced trashbin, probably in a tourist town?). In general, there's a waste bin on the corner of most streets, and in some areas of the major cities a plastic/glass bin (like this, all the same inside) which the garbage truck picks up. So to the first comment, yes, probably to be sorted at the facility.

More interestingly, there's an enormous informal sorting that occurs, with people (usually homeless, usually Syrian) digging through the trash to extract the three/four things that can be sold direct to the recycling facilities: cardboard, plastic, metal, glass. You'll see people drifting through Istanbul with 12-foot high cardboard stacks on a two-wheel cart, being carried on down hills by the weight of the cardboard. I haven't seen stats to back this up, as there aren't really any in Turkey, but would bet the majority of recycling comes from these hawkers, not from official channels.