Multi-stage trommel

This separates waste by size into small, medium and large. The small waste contains organic matter. Medium-sized waste still contains some organic matter, but, above all, recyclable materials. Large waste also includes recyclable materials.

The waste goes through two cylinders. The first of these has small holes (90 mm) and the second one larger holes (150x200 mm). The smaller objects fall through the holes in the first cylinder. The medium-sized objects fall through the holes in the second. The largest ones get to the end of the two cylinders.