Evaluation of the Laflèche
Pilot Peat Filter/Constructed Wetland System to Treat Landfill
Leachate - 2002-2007
|
Lead Researcher: Chris Kinsley – ckinsley@alfredc.uoguelph.ca
Prepared for: Laflèche Environmental Ltd.
Partners: Golder Associates Ltd. |
| A pilot scale treatment system was established in 2002 at
the Laflèche Landfill in Eastern Ontario, Canada. The
system consists of a series of treatment steps: a stabilisation
basin (10,000 m3), a woodland peat trickling filter (5200 m2),
a subsurface flow constructed wetland planted in Phragmites
sp. (2600 m2), a surface flow constructed wetland planted in
Typha sp. (3600 m2) and a polishing pond (3600 m2). The system
operates from May to December with leachate being recycled within
the landfill during the winter months. Treated effluent is either
discharged to a nearby drain or used to irrigate onsite poplar
plantations. Hydraulic loading rates have been increased 3 fold
while organic loading rates have doubled over the first 4 operating
seasons. A comprehensive monitoring program for system performance
is being conducted (organic matter, nutrients, salts, metals)
with the data used to determine kinetic pollutant removal rates. |
