After a running a successful landfill gas pilot phase at the Ekurhuleni Metropolitan Municipality (EMM) Weltevreden Landfill in Brakpan, it was determined that it would be feasible to commission Jones & Wagener to design a full scale landfill gas recovery system at the site.
 
The new design included the installation of vertical wells, horizontal wells, a 2000 nm3/h flare, a leachate/condensate pumping and drainage system and a gas reticulation network.

• Eighteen verticals wells were installed in the closed Cell 1 to an average depth of 14m. These wells were then connected via a ring main system where they were piped to the flare unit. The existing three pilot wells were also incorporated into this network.
• Six horizontal wells were installed in the working Cell 4 during various stages of its filling. The average length of these wells was 137m.  These were piped to a header main 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 dam onsite.

Overall 7.4ha of landfill were welled, the project was completed on time and is running at full capacity. Due to the success of the project EMM and J&W are looking to expand the landfill gas extraction network at the site. 

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