The students Yangzi Qin, Yingting Wang, Luckas Fischer and Hanying Xie presented a concept for a recycling 3D printer.
The concept aims to recycle printed objects and make new filament for your new projects. Further more you can put empty plastic bottles inside the printer and make new designs with the plastic.
This concept of a recycling 3D printer is not new. 3D Systems, Coca Cola and will.i.am invented EKOCYCLE, a recycling 3D printer for old Coke bottles.