When the municipal collection trucks and those that come from transfer stations – such as the one in Viladecans – arrive at the Ecoparc 4 of the Barcelona metropolitan area, they are weighed and identified to find out what town they come from, how much waste they're carrying and what types.

Next, the drivers offload the waste in separate pits for organic waste and refuse.

The workers of the Ecoparc 4 of the Barcelona metropolitan area continually take the waste from the pits with the grabber cranes, and take it to the start of the corresponding pre-treatment.