A wind turbine blade can outstretch a rail car, tip past 170 mph, and power homes for a quarter century. Until recently, Japan mostly buried them. That ending is changing fast, as wind turbine blade recycling turns retired blades into cement, steelmaking carbon, highway walls, and even a solar micro home.
Japan now expects 2,000 to 2,500 tons of waste blades every year in the 2030s, and four working exits have emerged in Japan, the United States, Britain, and the Netherlands. About 90 to 96 percent of a wind turbine by weight already has a recycling route. Towers are steel scrap, cables are copper, and many nacelle parts are aluminum and other recoverable metals. The blade is the exception.
Most blades are glass fiber reinforced plastic, or GFRP. Glass fiber gives stiffness, epoxy resin locks the layers in place, and the bond is permanent once cured. A Vestas materials passport for the V80 blade puts the mix at roughly 60 percent glass fiber and about one quarter epoxy resin, with wood, adhesives, coatings, and foam cores making up the rest. Once bonded together that way, the parts cannot be melted apart.