Developing an approach for decentralized purification of runway runoff containing de-icing agents of the airport Salzburg

The mostly used standardised system at airports around the world is to separate runway runoff polluted with de-icing agents according to the TOC-content. This method use a TOC measuring system to differentiate between minimally polluted runoff, which can be discharged into the surface water, and heavily polluted runoff, which is discharged into a municipal wastewater treatment plant (WWTP) for biological treatment. A new method to reduce the big amount of contaminated water entering the WWTP, is to separate the heavily polluted runway runoff in an indeed heavily polluted portion (suited for WWTP) and a medium polluted portion. This water can be sprinkled in the surrounding area of the runway, also using the biological treatment capacity of the in-situ soil. The complete new method wants to develop an approach for decentralized purification of runway drainage containing de-icing agents. For the needed treatment capacity the in-situ soils are mixed with technical substrates.