Munich Airport remains the only airport in the world that recycles and reuses its de-icing fluids onsite. The quantity of de-icing agents used ranges from 2,000 tons in a mild winter to 8,000 tons when conditions are especially harsh.
With the recycling process, FMG has been able to reduce the quota of new de-icing products consumed to well below 50%. The actual quota varies according to the severity of the winter, but on occasion, the recycling quota is far above 50%. In addition, the recycling operations reduces the wastewater resulting from aircraft de-icing. The recycled amount no longer has to be purified in the treatment plant and can instead be reused as new de-icing fluid.
The wastewater arising during aircraft de-icing travels along slotted gutters and ducts into dedicated underground collecting tanks. Where the glycol concentration is at least 5%, it is reconditioned in the recycling plant and reused for aircraft de-icing within four days. Approximately 70% of the glycol contained in the de-icing fluid can be recovered and recycled in this manner. Where the proportion of glycol is less than 5%, the de-icing water is moved to a de-icing water basin via a sewer system. In this case recycling no longer makes sense for technical and economical reasons.