As global wind capacity rises to new heights, the sustainability of green energy faces a significant bottleneck – recycling of the turbine blades that drive this renewable force. Wind turbines supplied 19% of all EU's electricity in 2023. After a 25-year lifespan, turbine blades, which are 10–15% of the mass and not recyclable, pose a disposal problem. The growing problem of the wind turbine end-of-life process has created an urgent call to action. An effective solution requires collaborative efforts, not only among companies but also from customers who might benefit from the reclaimed materials. And there is hope.

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A Swedish collaboration involving Librixer, Skellefteåkraft, AfterWind, and Svensk Vindenergi targets this problem by introducing a dry, energy-efficient recycling process. AfterWind financed the wind turbine blade recycling test, Skellefteåkraft supplied segments of decommissioned blades, and Svensk Vindenergi offered substantial support. The collaboration represents an important step towards responsible material management.

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Librixer, a greentech company with the aim to improve industrial recycling, conducted the test. Librixer successfully liberated the components of the dismantled wind turbine blade using their Librixer, Liberator machine, which employs a unique comminution technology process to liberate materials effectively. Fibers emerged, largely separated from the epoxy, which turned into dust, along with the remaining materials such as balsa wood, foam, and phenolic resin. Once freed, the materials can be sorted and recycled individually.

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Hanna Karlsson, project manager and nanotechnology engineer at Librixer, comments,

"Our technology supports the recycling of wind turbine blades through a mechanical, energy-efficient process. This test marks an important step toward achieving industry circularity."

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Future initiatives include testing various blade types and composites to understand potential for reuse, reducing environmental impact, and realizing a sustainable wind energy ecosystem.

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"The wind power industry is fully committed to finding market-based solutions for the sustainable management of wind turbine blades made from fiberglass composites. It's a challenge shared with other industries, such as the boat industry, and we must all put our heads together. That's why it's very exciting to collaborate with Librixer to test how their technology can be used for this purpose, and we are eager to see the results,” says Ylva Tengblad, Sustainability and local dialogue at Svensk Vindenergi.

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There are other recycling methods for wind turbine blades, such as chemical, thermal, and mechanical recycling. However, they can face limitations regarding energy usage and environmental impact. Chemical recycling consumes a significant amount of energy (21–90 MJ/kg) and relies on harsh chemicals. Thermal methods like pyrolysis use moderate energy (24–30 MJ/kg) but can weaken fibres, reducing their reuse value, while also creating air pollution. Current mechanical recycling is less energy-intensive (0.1–4.8 MJ/kg) but can damage the fibres to a degree that restricts their application to low-end uses.

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In contrast, Librixer offers a mechanical, dry recycling technology that conserves the quality of fibres with relatively low energy consumption, thus addressing the drawbacks of other methods. The Liberator machines disassemble turbine blades into component materials—such as glass and carbon fibres, epoxy, balsa wood, and foam – without harsh chemicals or high-impact processes that compromise material integrity. This method allows for the materials to be sorted and repurposed while maintaining their original quality, promoting a circular economy for turbine blades. The process's energy efficiency and cleanliness significantly enhance its sustainability and market potential.

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Sebastian Vinterek from Skellefteå Kraft mentions, "This work mirrors our commitment to environmental sustainability through innovative end-of-life management for turbine components."

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Henrik Selstam, CTO at AfterWind, acknowledges, "The results from this initial test support our approach to recycling blades, adding value and challenging traditional waste disposal methods. Our goal is to reintroduce parts of the recycled material into the manufacturing of new wind turbines".

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As Europe moves towards a landfill ban, initiatives like this test are important steps towards creating circular economic opportunities that could be replicated globally.

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"To advance turbine blade recycling, we need industry collaboration across all recycling methods. Not every blade can be repurposed into “bridges or playgrounds”, we need to tackle the growing waste challenge together," concludes Hanna Karlsson.

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About the Librixer technology

Librixer's innovative comminution technology effectively advances material processing by leveraging material science with high-frequency physics. This method is characterized by its use of pulsating pressure changes and resonant frequencies to enhance material breakdown with precision and control.

The comminution process unfolds through four key stages:

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Material harmony - we liberate and micronise materials along natural boundaries with controllable gentle, multi-directional forces 2. Compression & expansion - the machine employs high-frequency pulsating pressure changes to control the motion and fragmentation of solid materials, allowing for the targeted breakdown of materials with minimal waste.

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Pressure - near particle collision bypass pressure pulses and generate localised pressure waves that facilitate particle size reduction without direct impact, promoting a controlled and efficient breakdown.

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Chaotic collisions - involve surface-level shrinking and contracting, enhancing the breakdown process by adjusting to the changing resistance of materials, ensuring a consistent and controlled comminution process.

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Twister - high-velocity directional changes ensure a thorough breakdown of materials and uniform particle size reduction, crucial for producing a consistent end product.