REDWAVE – sensor based sorting machines – optimise the separation of HDPE
Upon a customer request, the separation of transparent and white HDPE bottles has been realised FOR THE FIRST TIME in a sorting plant. It was a challenging task as hardly any difference can be detected in the colour spectrum between transparent and white bottles.
In spite of this REDWAVE successfully implemented this type of sorting with the REDWAVE 3-way sorting machine.
This process is already performed to the utmost satisfaction of the customer in England at Hanbury Plastic Recycling. Hanbury Plastic Recycling Managing Director, Mr. Rick Devine said: “We are delighted with it!”
Hanbury Plastic Recycling Ltd. (UK) creates high quality plastic feedstock materials by sorting co-mingled commercial, industrial and post-consumer waste into separated polymer streams of high purity.
HPR Ltd. Process 40,000 tonnes/year of mixed kerbside collected plastic material.
HPR were looking for a solution to efficiently sort transparent HDPE (Milk bottles) from coloured HDPE including white, blue, red, etc. White HDPE in the transparent stream can negatively affect the quality of the sorted fraction. The REDWAVE sorting machine working on near-infrared and colour detection can reliably separate the higher value transparent fraction from white and other colours.
The REDWAVE optical sorter is also used for an additional application of sorting PET high grade material (PET clear bottles) from PET low grade material (PET trays, PET G,…) in one pass.
The benefit for HPR is the ability to sort all these materials with only one 3-way REDWAVE machine over two shifts.
The First shift process is to produce HDPE transparent and HDPE colour and then rest.
The Second shift process is to produce PET high grade material and PET low grade material and then rest.
The REDWAVE sorting system will sort 5 to 6 tonnes per hour across both shifts.
The big advantage of the REDWAVE 3-way-system is it’s ability to sort 2 fractions in one machine.