Our Technology

Pearl Global’s next-generation technology breaks down waste into its constituent parts, which can be sold or processed into even more valuable products.

Pearl Global’s technology represents a significant advancement on other recycling processes and is currently focused on processing end of life rubber, including waste tyres.

The technology offers portability and operating efficiency, and provides a new global environmental standard for waste conversion, operating in a low emission environment with no hazardous by-products.

How It Works

The process, known as thermal desorption, uses heat to separate waste into its component parts without the use of chemicals or acids. This is done using a special enclosed oven, sealed from the atmosphere. The oven is referred to as a thermal desorption unit, or TDU.

In the case of waste tyres, shredded rubber is passed through a number of variable zones that precisely manage the temperature, time and motion of the material based on its physical and chemical properties. This ensures that little or no unwanted or poisonous gases are generated.

The sealed oven has a discharge port with multiple air locks from which the carbon and steel products exit. Gases generated by the process are passed through a condenser, where useful hydrocarbons are captured, with the remaining gases passing through a thermal oxidiser to minimise emissions.

If any of the thermal desorption parameters are out even slightly, the process will lead to the creation of unwanted and potentially hazardous gasses and to the degradation of the products recovered in the process.

Pearl Tyre Conversion Process

Environmental Benefits

Pearl’s technology differentiates from other tyre recycling technologies through its ability to operate in a low emissions environment and produce no hazardous by-products.

Emissions from the thermal desorption process are well under the world’s strictest environmental standards. Its profile is significantly under the strict European EU6 vehicle standard, for example, with carbon monoxide emissions less than half the maximum allowed for a light vehicle diesel engine.

Pearl’s process is also the only one of its kind to be approved under the respective state regulations within Australia.

Pearl has an environmental license from the Western Australian Government Department of Environment Regulation. An independent report by the University of Western Australia also confirms that the process can operate in a low or no emissions environment.

Pearl also has approval to establish a plant in Queensland from the Department of Environment and Heritage, subject to planning approval from the Gold Coast City Council.

The technology is licensed to Pearl on an exclusive, worldwide basis.

Tyre Life Cycle


Another primary advantage of Pearl’s next-generation technology is that it doesn’t require large-scale, complex and expensive plants to operate.

One TDU can fit in a 40-foot iso-frame – the size of a shipping container – and be built, delivered and operating within 16 weeks. Once the TDU arrives on site it can be set up and running within two days, to process one ton of shredded tyres per hour.

TDUs don’t require high amounts of capital to construct, and their portability and modular design means they can be easily scaled.


Each Pearl TDU can process up to 720,000 passenger equivalent tyres, or 5,760 tons of rubber, per annum. A site that houses six TDUs could therefore process 4.3 million tyres or 34,000 tonnes of rubber per annum.