Franz Josef Strauss airport in Munich recycles aircraft defrosting agents using membrane technology - Case Study
For more than twenty years, Munich airport has been recovering sprayed-on aircraft de-icing fluid and processing it ready for re-use. The precipitation water, which is contaminated with de-icing fluid, is collected with special devices and fed back to a treatment plant. This plant consists of a series of treatment steps including pre-filtration, desalination, evaporation and finally preparation of ready-to-use (re-usable) aircraft de-icing fluid. In order to increase the recycling plant's capacity, the plant technology had to be modified and extended.
In early 2012, Munich Airport (Flughafen München GmbH) contracted EnviroChemie GmbH to deliver an Envopur® UFI ultrafiltration plant to expand the existing pre-filtration unit, which had proved its reliability over the years. The new membrane plant filters on average at least 4,000 litres per hour of precipitation water contaminated with de-icing agent. It does this while remaining compact, highly flexible and providing a high level of automation. The plant is equipped with a total of six ceramic Envopur® ultrafiltration modules, which are installed in three loops within the plant. The loops can be closed off individually, allowing the plant's performance to be adjusted to suit the rapidly changing operating conditions. The operator of the plant benefits from easy access to the tanks, modules and power units.