The aim of composting is to stabilize and mature the organic matter sorted during pre-treatment.
It involves keeping organic matter under controlled conditions to speed up its natural decomposition.
The organic matter from selective collection is composted during 36 days. The organic matter from the refuse container is composted during 42 days.
Once the decomposed organic matter has stabilized, it undergoes a grading process in order to eliminate impurities and homogenize it.
The results of this process are: