Swedish airport has an interesting treatment system in place.
Washing and maintaining aircraft can produce a lot of environmental contamination, especially in the form of heavy metals. Stockholm’s Arlanda airport has, for several years, been operating a purpose-designed, wash-water treatment plant to take care of this problem.
The wash-water cleaning plant at Arlanda airport was built in 1999, following a tightening of environmental emission regulations by the Swedish environmental authorities. Bengt Sj?gren, managing director of Aqua Konsult AB, the design consultants for the project, explains that, “the new regulations covered many metals which are commonly found on aircraft and in the airport environment, including cadmium, lead, copper, nickel, zinc and chromium. The restrictions they imposed on emission levels were quite strict.”