Traitement par marais artificiel des eaux de lixiviation d'un dépôt en tranchée en milieu nordique

Abstract

A few years ago, the leachate produced by the wastes concealed in the Township of Potton's landfill site resurfaced. Leachate is a potential source of contamination of the water table and surface waters. In accordance with the Quebec laws in effect, these resurgences must be collected and treated. To face up to this problem and according to different researches undertaken, such as this report, the representatives of the Municipality opted for the construction of wetlands as a means of treatment. This report, presents as a whole, the results of the research executed on this site. This study consists of the analysis, the review of literature, the research executed on the site, the construction of wetlands and the results of the environmental follow-up. In conclusion, this method of biological treatment allows to resolve the contamination problem due the leachate, in applying the specific criteria of design and operation for each case. The purifying output obtained meets with the waste control requirements, and thus, as well as during the winter season. Researches must be pursued to optimize the biokinetics factor in view of reducing the area required for the wetlands.