Department of the Environment, Water, Heritage and the Arts Waste Technology and Innovation Study

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Big Oversized Blender – A ‘megablender’ known as ‘Bob the Big Oversized Blender’ will be built in Victoria to reprocess hazardous waste into a fuel that can be used in cement kilns. Up to 7,000 tonnes of hazardous waste will be processed each year in the machine that separates it into different material streams for recycling and reprocessing. 130 The unit consists of a series of augers which shred material before it enters the blender itself, which is a fast spinning propeller over a shear plate. Magnetic conveyors pull out metal for washing and recovery. None of the components are new technology but combining them in a single machine is unique.131

Figure 14 BOB the Big Oversized Blender132

      1. Tyres

There are a number of technologies for processing and treating waste tyres. These predominantly involve shredding or mechanical grinding of whole or split tyres to prepare the rubber for recycling or reuse. Others are more complex and include devulcansation, microwave technology and some other physico-chemical processes. Tyres are also currently used a fuel for cement furnaces.
        1. Current technologies

          1. Mechanical processing

Whole or split tyres can be reused for engineering applications such as barriers and walls, soil reinforcement and erosion control. However, shredding, grinding and crushing after freezing produce a range of crumb sizes with a variety of applications, including athletic track surfaces, play ground surfaces, brake linings, landscaping mulch, carpet underlay, absorbents for wastes, shoe soles, adhesives, asphalt filler, bollards, barriers, kerbs and other drainage applications among others.133,134,135

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