Today, many recycling companies struggle with the value assessment of complex material/waste streams. The main issues are the costly and labour-intensive sampling procedures and subsequent chemical analysis, leading to long waiting times (often several weeks) and the associated financial uncertainty.
To counter this, VITO initiated the development of an in-line characterisation technology. This way, heterogenous and complex material streams can be assessed completely – eliminating the need for subsampling – and mass-balances can be produced ‘on-the-fly’. In fact, for each material particle a ‘digital twin’ is created which can be further assessed in a virtual way. In this technology, the heterogenous waste particles are dispersed on a conveyor belt as a mono-layer and scanned using X-rays, a 3D laser scanner and a colour camera. Using artificial intelligence, the device recognises the individual particles and assigns several important physical parameters: size, mass, shape, material, texture, etc.