After running a successful landfill gas pilot project at the Enviroserv Chloorkop landfill in 2004, it was determined that it would be feasible to commission a full scale landfill gas recovery system at the site, the methane destruction from which Enviroserv can claim Certified Emissions Reductions for, through the Kyoto Protocol.
 
The new design included the installation of vertical wells, horizontal wells, a 2000 nm3/h flare unit, a leachate/condensate pumping and drainage system and a gas reticulation network. Twenty three verticals wells were installed in the closed Cells 1,2 and 3 to an average depth of 25m. These wells were then connected to a control manifold were they were piped to the flare unit. The existing six pilot wells were also incorporated into this network. Five horizontal wells were installed in the working Cell 4 during various stages of its filling. The average length of these wells was 107m. These were piped to a control manifold and then on to the flare unit.
 
The flare compound included the flare unit, a standby generator, an air compressor to drive the liquid management system and various monitoring and security systems. The leachate extracted from the landfill and the condensate collected from the gas ran in its own liquid management system which discharged into the existing leachate dams onsite.
 
Overall 4.8ha of landfill were welled, the project was completed in time and is running at full capacity. Due to the success of the project Enviroserv and Jones & Wagener are looking to expand the landfill gas extraction network at the site.

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