The intractable garbage that doesn't go into kerbside recycling bins – officially known as 'residual waste' – is at the heart of the waste disposal crisis, as it mounts up at landfill sites. Now, an Australian resource company has applied its skills in mining and process engineering to come up with a remarkable combination of tried-and-tested technologies from around the world to recover, with just one large facility, an extra 23 000 tonnes of valuable recyclable material a year from residual waste.