Each year, Europeans generate 25 million tonnes of plastic waste. At a global level, 78 million tonnes of plastic waste is created annually. The world has to respond to this global problem together, as recycling rates everywhere have been at a low level so far: 30% in Europe, 25% in China, and just 9% in the USA (Plastikmüll-Statistik 2017). A large portion of the supposed waste is still incinerated, or ends up in landfills and the environment, which harbours risks for our water, air, and food chain.
To achieve a circular economy, it’s important
that all players contribute to this task: from product design and manufacture on the part of the plastics
industry, along with conscious use and avoidance of plastics as well as waste
separation on the part of consumers, followed by proper recycling and sorting
by the waste and recycling sector, all the way up to conversion into
high-quality secondary raw materials and their use in the manufacture of new
And this is exactly where Sesotec’s expertise is
called for. Technology that can sort waste with great precision and thereby
supply pure source materials has been around for a long time.
sorting systems sort the collected plastics (bottles, flakes, and ground
material) based on a range of criteria, such as colour, shape or type of
material. They are equipped with
sensors that can be combined to suit the particular application scenario.
Infrared technology enables the systems to recognise different materials.
Camera systems allow the material flows to be sorted by colour and shape.
Special metal sensors can also be built into the systems.
has taken on the industry’s challenge, and more than 600 of its sorting systems
for plastics recycling are in use worldwide. In
many application scenarios, purity levels of more than 99.9% have been
achieved. Only high-quality sorted materials can facilitate high-quality
material recycling. The
challenges that arise in sorting are caused primarily by material composites,
plastics with additives, labels, and dirty plastics.
PET as a model
Polyethylene terephthalate – better known as PET – is a highly reusable material as it does not lose its properties when recycled, making it 100% recyclable.
German consumers return 99% of the PET bottles that require a mandatory deposit. 93.5% of these bottles are sorted and recycled, either into new PET bottles (34%), films (27%), textile fibres (23%) or strapping and cleaning product bottles (16%).
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