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Highbury Landfill Lo-Cal flare Supply and GCS Monitoring and Maintenance

Project Name

Project Location

Highbury, South Australia


Highbury Landfill Authority

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Project Description

Due to decreasing landfill gas (LFG) volume and quality on a former EDL landfill power generation site, an innovative flaring system was required to continue controlling migration of LFG for the long term, as the power generator was decommissioned. The project involved controlling the LFG from two landfill sites, adjacent each other but linked by a common gas collection system. Houses were present on the northern, western and southern boundaries, with a high risk of off-site LFG migration due to the sandy geology of the area.

Ennovo provided a temporary elevated flare whilst the power generator was decommissioned to ensure gas extraction occurred on a 24/7 basis. The gas collection system (GCS) was balanced to provide data for the design and commissioning of a permanent flare for the site. The temporary elevated flare operated for approximately six months whilst the permanent flare was commissioned.

The aging GCS infrastructure and geology of the site created a number of issues in terms of maintaining 24/7 operation of the flare, and was a major consideration in the design of the permanent system. Continual remedial works were undertaken on the GCS to allow effective operation of the flare system as well as to mitigate off-site gas migration. These works included draining flow lines, replacing broken or seized valves, repairing manifolds and installing condensate pumps.

The final design involved the installation of a 600 m3/hr Lo-Cal HT flare, the largest of its type in Australia. The flare was successfully installed and commissioned and has been effectively controlling the migration of LFG at the site for over 2 years, combusting LFG with a methane concertation down to 12% (v/v). It is expected the flare will be able to operate for over 10 years, providing a cost-effective solution for the client.

Specific activities included the following:

  • Pumping trial resource assessment
  • Elevated flare hire
  • Lo-Cal HT flare design and manufacture
  • GCS repair and maintenance
  • Lo-Cal HT flare installation and commissioning
  • Monitoring and maintenance
  • Data management and reporting
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