Tyre recycling project addresses mining industry waste

Tyre Stewardship Australia (TSA) CEO Lina Goodman has described the National Project on Options for End-of-Life Tyres as a significant piece of research into how Australia managed used tyres, including more than 100,000 tonnes of tyres buried at mine sites each year.

The Western Australian Government-led project has reported that the national industry-led Tyre Product Stewardship Scheme was generating benefits but fell short in key areas.

The scheme was set up to boost resource recovery and recycling and to minimise the environmental, health and safety impacts of used tyres. But the need to achieve more a regulated framework was vital, according to TSA.

“As with all voluntary schemes it faces inherent limitations, including free riders, the ongoing cost burden on communities and missed opportunities for advanced manufacturing,” TSA said.

“For the first time, governments now have a substantial evidence base to inform next steps. TSA calls on federal and state environment ministers to progress to a comprehensive cost–benefit analysis of a regulated product stewardship scheme for tyres.

“This is a pivotal moment to secure better environmental, economic and industry outcomes.”

Australia has been one of the largest markets for off-the-road (OTR) tyres, which can cost US$40,000 each, for 50 years. The International Council on Mining and Metals (ICMM) said improving circularity in mining was critical to achieving a “net-zero, nature-positive future” underpinned by responsibly sourced materials.

The Council referenced a 2023 TSA report that indicated the industry accounted for 80% of an estimated 245,000 tonnes of OTR tyre, conveyor belt and vehicle track waste generated annually — “yet less than 5% of OTR tyres used in mining are recovered,” the ICMM said.

“Mine sites are reliant on a range of resources and produce a number of different waste streams. A key waste stream is tyres, essential components of haul trucks and other vehicles used to transport ore and other materials.

“Circularity can be an important approach to meeting the [minerals and metals] demand required for the energy transition while limiting waste production and its impacts on the environment. Through the development of new and innovative approaches, tyre waste and associated environmental impacts can be reduced and new value unlocked.

“But close collaboration between industry, local communities and stakeholders is key for circular strategies to succeed.”

TSA’s 2023 report said Australia’s OTR tyre market was forecast to grow at more than 6% a year from 2022–2027. Its latest annual review again highlighted a “tale of two sectors”, with about two-thirds of the 537,000 t of end-of-life tyres generated in the country in 2023–24 recovered through reuse, recycling or energy recovery.

An estimated recovery rate of 87% was achieved for passenger, truck and bus tyres but only 13% for mining and agriculture OTR tyres. For mining alone, the recovery rate was put at less than 5%, with most waste buried onsite.

“The mining industry does the right thing when they recover tyres … but they shouldn’t get a free pass to bury 109,000 t annually onsite while every other industry faces strict waste disposal requirements. That’s not sustainable and it’s not fair,” Goodman said.

She said Australia’s high on-road tyre recovery rate also masks “an underlying failure to create genuine circular economy outcomes” since more than half of Australia’s recovered tyres were used in fuel and other energy applications, much of it offshore, and not recycled into products with continuous life cycles.

“Australia’s accredited tyre recyclers should be commended for their pursuit of end-of-life tyre recovery in the passenger, truck and bus sectors,” Goodman said. “They’ve built collection networks and processing infrastructure that works and proven that high recovery rates are achievable when there’s commitment to proper stewardship. The challenge is extending this success to the mining sector, which generates the heaviest tyres but has the lowest recovery rates. Each sector has half the solution.

“Although the overall recovery rate of mining tyres is low, we’re seeing encouraging signs that mining companies are demanding — of themselves and their downstream partners — greater circular outcomes for the valuable resources contained in tyres.

“If this current trajectory continues, the mining industry will drive significant improvement in the reuse and recycling of tyres in Australia.

“We believe it’s now time to give TSA-accredited recyclers the reins to support the OTR sector and show the world that Australia can set the pace in transforming how we manage these giant tyres.”

Intelligent public policy and regulated product stewardship can speed up this process, TSA said. It said the WA Government-led tyre management project report “identifies a critical opportunity for governments to expand recovery systems and stimulate higher-value markets”.

“Shifting end-of-life tyres into advanced recovery pathways could unlock tens of millions — and potentially more than $100 million — in added resource value each year,” Goodman said. “Nothing will change unless government steps in with proper regulatory measures.

“Every tyre we export for tyre-derived fuel is a missed opportunity for resource recovery, local jobs and investment. We have the collection systems, we’re building the end markets and we have companies committed to doing the right thing: we just lack the regulatory backbone to make it happen.

“Now is the time to unlock the full potential of this industry and show that Australia can lead the world in tyre circularity — not just recovery rates, but genuine circular value creation.”

Image credit: iStock.com/meadowmouse