Aerated Gravel Beds are an essential component to the redesign of the airport’s
storm water management system. The beds provide treatment of “first flush”
storm water, which is heavily laden with glycols during the deicing season. To
treat the glycol, the beds include Naturally Wallace's patented technology,
TM
"Forced Bed Aeration " that supplies oxygen uniformly over the system and
permits operator control of treatment. The distribution of wetland influent is also
optimized so as to reduce “bio-clots” within the beds gravel. Also important to
the project was a treatability study that established cold weather reaction rates
for the treatment of spent deicing liquid.