Waste disposal company Hündgen in Swisttal, Germany, has focused on achieving as high a level of material purity as possible when sorting waste.
It has worked with Steinert, the specialist for magnet and sensor sorting systems, to examine remaining losses when it has sorted lightweight plastic packaging. Experts at the Cologne Test Centre examined the material to determine which valuable plastics could be extracted from the remaining packaging waste.
Hündgen was impressed by the UniSort Black system, which removes black plastics out of the flow of materials along with plastics that have a near infrared-specifiable spectrum such as PE, PP and PS.
A company spokesman commented: “UniSort Black not only enabled us to offer a more flexible range of services for our customers, but to report higher sorting rates to the operators of the dual recycling system.”
This increased the plastics yield from the residual fraction and allowed materials to be reintegrated into the material flow and recycled: “It also makes it easier for us to achieve the contractually agreed sorting rates, reduce incineration costs and acquire additional materials by extracting polyolefins in the form of bottles made of PE and PP.”