Perhaps this is a controversial viewpoint, but I am now thinking that recycling of 3D print waste is a lost cause.
scraps
3D Print Recycling Firm RecyclingFabrik Pauses Intake to Develop Next-Generation Process
RecyclingFabrik is expanding.
Creality Teases M1/R1 Filament Shredder and Extruder for In-House Filament Recycling
Creality is to launch a filament recycling system, the M1 / R1.