May 23, 2020

Green technology a feather in the cap for council

Green technology a feather in the cap for council

A $4 million project will see Townsville City Council harness green technology to construct a final cap on the remaining portion of the Hervey Range Landfill site.

It will be the first council in Australia to use the environmentally friendly bituminous geomembrane to cap a landfill site, managing methane leakage from waste and accelerating site rehabilitation.

Water and waste committee chairman Russ Cook said it was exciting to be able to use this innovative technology to rehabilitate the landfill.

“Our team is starting a final capping of the landfilled waste, which is currently temporarily capped with earth and mulch. This temporary capping allows some rainwater to infiltrate the landfill mass, which creates leachate that has to be managed,” Cr Cook said.

“The final capping is constructed by creating layers of earth and a synthetic membrane called bituminous geomembrane.

“This membrane will stop rainwater from entering the landfill and will capture the methane produced by the waste, directing it towards a flare to burn it.

“It will take about six months to complete the capping.” 

Mendi Constructions has been contracted to carry out the work. Cr Cook said it was the final step towards rehabilitating the site.

“Once this capping is finished, the site will have to be managed for about another 30 years to manage the existing leachate and gas, as well as doing landscape maintenance,” Cr Cook said.

“The waste mound will look like a hill once this process is complete. The Hervey Range facility will still have an active waste transfer station and resource recovery facility, including the tip shop.”

Capping of the landfill began earlier this month, and is expected to be completed by the end of the year.