Redwave installs plastics recycling system in Belgium

System is designed to upgrade authority’s existing manual sort line.

July 17, 2014
RTGE Staff

Redwave three-way optical sorterRecycling company IMOG, an inter-municipal public sanitary authority located in South West Flanders, Belgium, recently commissioned equipment company Redwave to supply the authority with equipment to improve its recycling services. According to Redwave, IMOG wanted to upgrade its existing manual sorting line with optical sorters, which could bring more automation to the facility. At the same time, the authority was seeking higher quality material while reducing the number of personnel needed to work at the recycling facility.

The Belgium authority provides integrated waste management services for 11 municipalities and more than 230,000 inhabitants. At IMOG’s PMD sorting facility more than 4,000 metric tons of separately collected mixed light packaging material (PMD) and polypropylene material are processed per year.

Additionally, Redwave reports, IMOG was constrained by a narrow time frame for the upgrade—about three weeks.

To assist the authority, Redwave, a division of BT-Wolfgang Binder GmbH, based in Gleisdort, Austria, designed a system that allowed for the handling of blue PMD plastic bags fed into a bag opener and then moved on to a trommel screen. Fines from the trammel screen are collected and the spill-over is separated by hand.

The medium fraction reports to an over-belt magnet to remove ferrous materials and then to the two Redwave optical sorters. Sorting is performed by a three-way system, with near-infrared and color detection. The four different PMD fractions are reliably separated in accordance with strict FOST Plus criteria, Redwave says.

The first Redwave optical sorter ejects PET in one channel and HDPE and TetraPak containers in the second channel. The second Redwave carries out fine sorting of both of the channels into four clean fractions: clear PET, blue PET, TetraPak cartons and HDPE. The remaining material stream is passed over an eddy current separator and final recovery hand picking station.

The system has a throughput of about two metric tons per hour, according to the equipment supplier. Key features of the system installed by Redwave include its three-way capability allowing a single sorting machine to sort a variety of defined fractions. The company says the system also offers variable sorting tasks and programming options.

More information on Redwave may be obtained by visiting