After the incineration of MSW, ashes remain. These ashes contain metals (both ferrous and non-ferrous) – stones – sand – unburned. In the bottom ash recycling installations, the unburned is recuperated; sand, stones, ferrous and non-ferrous are recycled and sold.
Wet treatment
During the washing process of the ashes, the leaching process of sand and stones has been improved and speed up. The quality (and value) of the metals is increased.
Packaging waste (“Groene punt” Belgium and “Grune Punkt” Germany) like Aluminium cans, PET bottles (white, green, blue, red), HDPE, TETRA, are sorted automatically with the use of IR technology and pressed into bales. Each of the fractions are re-used in the industry for the production of amongst other: sweaters, new cans, ...
Organic waste and wet biomass are screened, sorted on metals, sand and stones, gravel, plastics before it can be transferred into a green gas/green electricity in several digesters (project Cambi) or into compost as a fertilizer (project Stercompost).