As e-waste continues to accumulate in landfills around the world, an Australian scientist provides a viable solution to this growing environmental threat. According to Veena Sahajwalla, a materials scientist at the University of New South Wales, “We are all micro minersâ€. Sahajwalla's declaration became less exaggerated when considering the millions of electronic hardware devices we abandoned each year. E-waste has proven to be a valuable resource: about 6,000 mobile phones and other independent devices can decompose about 130 kilograms of copper, 3 kilograms of silver, 340 grams of gold and 140 grams of palladium.
But this is just the tip of the iceberg, Sahajwalla said: “Australia has nearly 25 million mobile phones.†These are not used. "When you consider a large number of discarded TV sets, computers, tablets and other appliances, the number is amazing. According to the UNEP, in 2014 alone, the global $1 trillion electronics industry was produced. About 42 million tons of outdated electronic equipment, the most likely loss of up to 52 billion US dollars worth of embedded resources. All this comes down to why? Sahajwalla believes that now is the time for us to do some environmental clean-up work, when we do this thing It can be cashed.
Sahajwalla and colleagues recently established the Sustainable Materials Research and Technology Center (SMaRT), which is currently working to make e-waste safer and more profitable. Currently, the goal of these efforts is to shape low-cost products that replace industrial-scale smelting. Sahajwalla calls them “micro factories†and their size is related to the size of the container. Inside, the combination of robotic arm and automated drone divides e-waste into separate parts such as glass screens, printed circuit boards and plastic enclosures. A proprietary SMaRT center visual recognition program facilitates this process.
In general, these micro-factories will eliminate valuable metal alloys, composites, ceramics and micro-materials while safely eliminating any dangerous effects. Since these materials already have considerable market value and can be used to produce everything from jewelry to aircraft hardware, manufacturers are expected to become ready-made buyers of recycled products. At lower temperatures, micro-factories can be used to melt plastic into 3D printed fibers, as well as other high-value plastic products. Although plastic doesn't sound as profitable as silver and gold, it may not be as far away as you might think.
Currently, the team is still in the design stage, but if they can move these miniature factories to the scene, the benefits are obvious. By dispersing the recycling business, Sahajwalla's system will allow e-waste to be processed locally where it is collected. Such an approach would help eliminate harmful emissions that are far removed from transporting waste to the recycling plant. Micro-factories will also create viable new business opportunities for small recycling plants, which can theoretically be transformed from waste collection to manufacturing high-value products. All in all, Sahajwalla believes that the innovation of the SMaRT Center "has great potential for Australia to make something a little different from e-waste in other parts of the world."
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