NIR Optical Sorting
Near infra-red/NIR Optical Sorting systems use advanced infra-red sensors to effectively identify materials of different wavelengths. The targeted materials are then ejected through the high-pressure valve to achieve the purpose of sortings[1]. The first NIR sorting systems were used to process recyclable materials at the beginning of the 1990s and the technology has developed significantly in the past five years. These systems are frequently used in MRFs to streamline the sorting process, reduce labour costs, and increase the throughput to make recycling operations more efficient[2]. NIR sorting systems are capable of processing packaging, papers, waste electrical equipment, residual waste (RDF), plastics and vehicle recycling[3].