Regarding the solid waste resulting from the process of the Waste-to-Energy plant, the facilities is pioneering in the optimization of the comprehensive cycle of waste management, recovering the total amount of slag obtained at the end of the process.

Slag or bottom ashes is the main solid waste resulting from the incineration process –20% in weight of the furnace input–. The recovery of this subproduct –classified as non special waste– is made through an authorized waste management facility as established by the regulations Order 15th february 1996 of Generalitat de Catalunya.

The slag, once mechanically treated and duly matured at the authorized management facility, is recovered under the commercial name “escograva”, so it can be used as a subbase filling in civil works.

This way, slag stops being a waste from the comprehensive management system, remaining only 2-4% in weight, the flying ashes, which are the only real waste or refuse from the process.