Ti Tree Energy Generation Project

Ti Tree Energy Generation Project is an electricity generation from landfill gas project located at Willowbank, approximately 15km southwest of Ipswich in Queensland. It was registered in July 2015 and occupies an unknown area size in terms of the strict carbon project boundary, but physically utilises a massive 36 million cubic metre void left over from a previous open-cut coal mining operation.

Electricity generation from landfill gas projects involve capturing methane gas emitted by decomposing organic waste and combusting it in gas engines to produce electricity. By doing so, the methodology prevents potent greenhouse gases from entering the atmosphere while generating renewable energy to offset fossil-fuel reliance on the grid.

The surrounding Ipswich and Willowbank area is historically known for coal mining, cattle grazing, and forestry operations. The region experiences a humid subtropical climate with moderate-to-high rainfall, and the local undisturbed soils typically feature clay-rich vertosols and dermosols, though the project itself sits on heavily modified former mine land.

This project was originally registered under older legacy waste methods and transitioned over time to the 2021 Electricity Generation from Landfill Gas methodology. Operated by Veolia Environmental Services in a joint venture with JJ's Waste & Recycling, the site utilises advanced bioreactor technology. This system recirculates liquids to rapidly stabilise the waste in just 5 to 10 years, drastically accelerating decomposition compared to traditional landfills. The facility successfully completed a Carbon Abatement Contract in October 2021 and produces enough green electricity to power thousands of local homes, offsetting emissions equivalent to removing 90,000 cars from the road.