Unable to answer "What can be left here for recycling?" – underground: Bruxelles-Propreté - Net Brussel (Recycling Bin) – https://osm.org/node/8733931899 via StreetComplete 57.0:

There are 2 glass containers hete and 1 clothes of les petits riens.
There's also an oil container at the other side of the street, in front of the police station.