A five story parking garage in southern Sweden is turning decommissioned wind turbine blades into building materials, offering a concrete example of circular economy applied to wind energy infrastructure.
Wind turbine blade reuse in a sustainable parking project
A sustainable parking garage built using decommissioned wind turbine blades. That is the idea developed by the Swedish company Lunds kommunala parkeringsbolag, which in the city of Lund has completed a five story parking structure with 365 parking spaces. The company manages around 28,000 parking spaces across the municipality.
The blades, originally designed to withstand wind, weather and mechanical stress for decades, are made of fiberglass and carbon fiber composites. These materials make them extremely durable, but also notoriously difficult to recycle at the end of their operational life.
The green and innovative concept
The project’s architect, Jonas Lloyd, came up with the idea after reading an article about the U.S. wind industry and the challenges associated with recycling decommissioned blades. That insight led to a production process aimed at creating non load bearing wall elements that now cover large sections of the facade, using 57 rotor blades.
Beyond wind turbine blades, the facade also incorporates plant species that support pollination, while the roof is covered with solar panels connected to a battery system that powers electric vehicle charging at night. The parking facility is equipped with 40 charging points.
Large scale wind turbine blade reuse
The project was made possible through collaboration with Vattenfall, one of Europe’s largest wind energy developers, operating more than 1,400 wind turbines across several countries. The Swedish utility has made wind turbine blade reuse, refurbishment, repurposing and recycling a strategic priority.
Vattenfall has set a target to ensure that 100 percent of rotor blades are reused, refurbished, adapted or recycled by 2030. To support this goal, the company has banned the disposal of used blades in landfills. When a wind turbine is decommissioned, the company first assesses whether the blades can be sold for use in another project. If not, they are repurposed, for example as frames for solar panels or as insulation materials. In some cases, old blades have even been used to manufacture skis.
Why wind turbine blades are difficult to recycle
Recycling wind turbine blades is challenging because they are made of composite materials, fiberglass or carbon fiber bonded with thermoset resins, engineered to be extremely strong but not remeltable or easily separable at end of life. Fibers and resins are tightly bound, and separating them requires mechanical, thermal or chemical processes that are costly, energy intensive and often result in recovered materials of lower quality than the original.
In addition, the very large size of the blades complicates transportation and treatment, increasing logistical costs. For many years, disposal was cheaper than recycling, slowing the development of industrial scale solutions. Today, however, new technologies, alternative materials and stricter regulations are gradually improving the outlook.
The most promising recycling technologies
The most promising approaches to wind turbine blade reuse and recycling focus on recovering valuable fibers and rethinking material design. Chemical recycling, such as solvolysis, uses solvents to separate fibers from resins, delivering higher quality results than simple shredding. Pyrolysis uses high temperatures in the absence of oxygen to recover carbon fibers, although it remains energy intensive. Co processing in cement plants uses shredded blades as both fuel and raw material, reducing fossil resource consumption.
At the same time, design for recycling principles are gaining ground, with the introduction of thermoplastic resins and composite materials that are easier to separate and recover at the end of their life cycle.
