Two treatment methods for stormwater sediments - pilot plant and landfarming - and reuse of the treated sediments in civil engineering

The aim of this research was to present a pilot plant for the treatment of stormwater sediments and to compare the decontamination rate to that obtained by landfarming. The possibilities for reuse of the treated sediments in civil engineering are also studied. Four sediments from retention/infiltrat...

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Bibliographic Details
Published in:Environmental technology 2009-07, Vol.30 (8), p.825-830
Main Authors: Petavy, F., Ruban, V., Conil, P., Viau, J.Y., Auriol, J.C.
Format: Article
Language:English
Subjects:
Agriculture
Applied sciences
Biodiversity and Ecology
Civil engineering
Engineering
Environmental Sciences
Exact sciences and technology
Geologic Sediments - chemistry
Geotechnics
hydrocarbons
Hydrocarbons - analysis
Infiltration
landfarming
Pilot plants
Pollution
Polyallylamine hydrochloride
polycyclic aromatic hydrocarbons
Polycyclic Aromatic Hydrocarbons - analysis
Rain
Reuse
Sediments
Soil Pollutants - analysis
Stormwater
stormwater sediments
treatment plant
Waste Management - methods
Waste Products - analysis
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Summary:The aim of this research was to present a pilot plant for the treatment of stormwater sediments and to compare the decontamination rate to that obtained by landfarming. The possibilities for reuse of the treated sediments in civil engineering are also studied. Four sediments from retention/infiltration ponds or from street sweeping were studied. In each case organic matter (OM), total hydrocarbons (TH) and polycyclic aromatic hydrocarbons (PAH) were measured. Geotechnical tests were carried out to evaluate the reuse possibilities of the treated sediments. Treatment by means of the pilot plant was efficient at reducing TH and PAH concentrations: THs were reduced by 53-97% and PAHs were decreased by 60-95%. By comparison, a reduction of 45-75% in TH concentration is obtained with landfarming, whereas there is no significant decrease in PAHs. Furthermore, geotechnical tests showed that the treated fractions from the pilot plant can be reused as road embankments and as a capping layer. These results are most encouraging and show that stormwater sediments can valuably be reused after treatment in a pilot plant. Landfarming is less efficient but this technique could be used as a pretreatment in the case of high TH pollution.
ISSN:0959-3330
1479-487X
DOI:10.1080/09593330902990113