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SFGP 2007 - Treatment of Stormwater Sediments with a View to Their Re-Use

The objective of this research is to show the efficiency of a pilot plant based on sieving and attrition for the treatment of stormwater sediments. Seven sediments from retention/infiltration ponds and street sweeping were chosen for the pilot study. Geotechnical tests were carried out in order to make sure that the treated sediments have the required characteristics to be re-used. The study shows that these sediments can valuably be processed by means of a pilot plant allowing the concentration of pollutants in the fine particles. Our results are encouraging and show that, taking into account environmental, geotechnical and economical requirements, up to 75 % of the bulk sediment can be re-used after the proposed treatment.