Means of reducing inner city pollution using the existing drain system

摘要

Device for treating polluted air, in particular in a city centre, comprising a system (16) of roads and buried collection reservoirs, in particular for rainwater, with a main pipe (26) and recovery points (24, 28) for the rainwater opening on the road and discharging into the pipe directly or via a grille, as well as a water treatment site. The device involves tapping (36) into the pipe, means (40) of depressing the volume of the pipe across the tapping and means (14) of treating the polluted air sucked through the tapping.