Capture and Beneficial Use of Landfill Gas and Leachate at the Salmon Arm Landfill
The CSRD landfill at Salmon Arm has been planted with two varieties of hybrid poplar grown in a bio-solid and soil mix 90 cm thick over a 4 mm decommissioning cap. This plantation of 1100 trees is character irrigated with re-cycled leachate. Trees were planted late in the 2011 season and are fully 2 meters tall at the end of the growing season. Beneath the cap is a methane gas recovery system. Trees may be used for green chemical production or composted on site for methane capture. They earn environmental benefits as they remedy air, soil and water throughout their growth.
This picture was taken in 2010 during the capping/construction process at CSRD municipal landfill site. In the foreground is the municipal airport.
This shows the thick plastic containment skin being installed. The manufactured soil is placed over in preparation for tree growth medium. 30cm of gravel is the first layer on top of the membrane. Next layer is manufactured soil of biosolids mixed 50% with local soil 30cm thick. The final layer is biosolids mixed with wood chips, (crushed pallets etc), 30cm thick.
This is the soil/biosolids, wood chip mixing operation. In the foreground is the leachate pond already filling from rainfall entering the landfill before membrane over coverage.
Planting time; using irrigation lines as a straight guide and pre-drilled holes in the line for set distances apart within the rows. The student hired managed the irrigating regime for the entire season. The automated system provided frustrations until the bugs were worked out.
It’s a perfect start up, in spite of a late planting.
Healthy trees making an excellent start, easily passing weed competition. Hard work weeding is a usual recipe for success.
In spite of late planting, the trees have grown to an average of two meters in height two months before leaf drop.
In 2011 the CSRD decommissioned municipal landfill site area became a park. Two varieties of hybrid poplars adorn the cap.
Looking down the plantation rows.
BC Agrologist Institute group touring CSRD plantation cap. This forest cap, at 2 meters tall, utilized up to 6 gallons US per tree per day at the very first season end.
On the CSRD site, a winter time look after leaf drop. A methane gas well is pictured amongst the phytoremediation installation (“Park”).