Biofilter with innovative filling for low-temperature treatment of sewage from de-icing airport runways

The Kinetics of Pollutant Removal through Biofiltration from Stormwater Containing Airport De-Icing Agents

“…In the bottom of the biofilter, which was outflow part, was a drain valve used to collect samples of wastewater. The technical parameters of the biofilter were: surface area 95 cm 2 , volume 2500 cm 3 , active volume 1552 cm 3 , total height 0.24 m and biofilter filling height 0.19 m [6]. Four temperature variants were adopted:…”

“…The study on the kinetics of pollutant removal started at the end of technological research lasting four months. This four month research was preceded by three months adaptive period [6]. Samples were collected after 0.5, 6, and 12 h of operation; then, at 12 h intervals for 84 h, with the final sample taken after 96 h of operation ( Figure 1).…”

“…It is characterized by a large specific surface, resistance to physicochemical factors, low heat conductivity, good phosphorus-sorption properties, and facilitates the deammonification process. These attributes provide good conditions for biofilm growth even at low temperatures [5,6].…”

Treatment of Wastewater Containing Runway De-Icing Agents in Biofilters as a Part of Airport Environment Management System

“…The previous authors' research has shown that the use of biofilters with lightweight aggregates prepared from fly ash from sewage sludge thermal treatment (FASST LWA) filling could be an effective method for removing nitrogen and organic compounds from wastewater containing airfield deicing fluids. The nitrogen compounds were removed as a result of the simultaneous process of nitrification and denitrification, where the organic compounds present in the treated wastewater served as a carbon source [14,19].…”

“…The advantages of granulate confirmed in tests on a laboratory scale have led to considerations on the possibility of its application on a technical scale. The synthesis of the results of both cited investigations [14,19] is a part of this paper. Based on the results of laboratory studies, technological systems of wastewater treatment plants for wastewater containing airport runway de-icing agents with the use of biofilters were proposed, which enable the treated wastewater to be discharged into natural waters, soil, and the sewerage network (common, sanitary, storm water sewers).…”