project - Decontamination of run-off waters with permeable road structures – is a project granted by the Walloon Region in the framework of the Collective Research 2012 call.
The four partners are: the CRR
- Belgian Road Research Centre –, the CEWAC
– Walloon research centre of assembly and material control, the CWBI
(ULg) - WalloonCentreof Industrial Biology, and the CELABOR
For several years now, a growing number of areas are being covered with impermeable materials, which increases the risk of flooding, less efficient groundwater recharge, etc.
In this context, road permeable structures
have been developed to allow the infiltration of rainwater into the floor and ground, and give a “storm basin” effect due to the delay of infiltration and storage in the road structures.
However, the risks of pollution
of soil and groundwater by pollutants from vehicles are questionable. Therefore, the research project focuses on these risks.
The objective of this research project is to assess the possibility of decontamination using permeable structures
and to investigate how the effectiveness of decontamination can be improved.
will be incorporated in these structures in order to degrade pollutants.
The research began with a highlighting of pollutants
which can be found in road structures.
The continuation of the research focuses on purifying the character of the structure
itself, as well as the contribution of specific microorganisms
to degrade pollutants : how to grow them, how to integrate them into the structures, how to maintain them alive.
Then, the decontamination effectiveness of permeable structures will be evaluated on a pilot scale. The pilot will be designed according to specifications taking into account the materials of the drainage structure, the rainfall data, the pollutants founded in runoff and the micro-organisms introduced in the structure. Experimental data will confirm the efficiency of the decontamination structure and the evolution of the bacterial population.
Finally, this project will establish constructive advice practices
adapted to each situation and easily applied by road builders.