| 3 MINUTE READ

GE announces U.S. blade recycling contract with Veolia

Decommissioned composite wind turbine blades will be recycled into cement production to replace raw material needs, while still enabling a net-positive environmental impact.
#sustainability #windblades #gerenewable

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon
A wind turbine blade being prepared for removal after it has reached the end of its life cycle

A wind turbine blade being prepared for removal after it has reached the end of its life cycle, with a nearby wind turbine in the backdrop. Blades like these are now being repurposed by Veolia North America after reaching the end of their life cycle, which typically lasts about 20 years. Photo Credit: Veolia, Business Wire.

GE Renewable Energy (Paris, France) announced on Dec. 8 that it has signed a multi-year agreement with Veolia North America (VNA, Boston, Mass., U.S.), a group that designs and provides water, waste and energy management solutions, to recycle wind blades removed from GE’s U.S.-based onshore turbines during upgrades and repowering efforts. Through this agreement, GE plans to recycle the majority of blades that are replaced during repowering efforts.

As a part of the agreement, blades that have been removed from turbines will be shredded at VNA’s processing facility in Missouri via the company’s cement kiln co-processing technology and then used as a raw material replacement for coal, sand and clay at cement manufacturing facilities across the U.S. On average, nearly 90% of the blade material, by weight, will be reused as a repurposed engineered material for cement production. More than 65% of the blade weight replaces raw materials that would otherwise be added to the kiln to create the cement, and about 28% of the blade weight provides energy for the chemical reaction that takes place in the kiln. Similar recycling processes in Europe have been proven to be effective at a commercial scale.

Compared to traditional cement manufacturing, blade recycling enables a 27% net reduction in CO2 emissions from cement production.

“Sustainable disposal of composites such as wind turbine blades has been a challenge, not only for the wind turbine industry, but also for aerospace, maritime, automotive and construction industries,” says Anne McEntee, CEO of GE Renewable Energy’s Digital Services business. “VNA’s unique offering provides the opportunity to scale up and deploy quickly in North America, with minimum disruption to customers and significant benefit to the environment. We look forward to working with them on this effort to create a circular economy for composite materials.”

Wind turbine blades may be replaced through turbine improvement or ‘repowering’ efforts, when specific elements of the turbine are upgraded to improve the efficiency and lifespan of the turbine, without replacing the entire machine. Longer, lighter blades help the turbine to generate more energy every year, providing even more renewable energy to their end customers.

Bob Cappadona, COO for VNA’s Environmental Solutions and Services division, says, “By adding wind turbine blades — which are primarily made of fiberglass — to replace raw materials for cement manufacturing, we are reducing the amount of coal, sand and minerals that are needed to produce the cement, ultimately resulting in greener cement that can be used for a variety of products. Last summer, we completed a trial using a GE blade, and we were very happy with the results. This fall we have processed more than 100 blades so far, and our customers have been very pleased with the product.”

An environmental impact analysis conducted by Quantis U.S. found that the net effect of blade recycling through cement kiln co-processing is positive in all categories. Compared to traditional cement manufacturing, blade recycling enables a 27% net reduction in CO2 emissions from cement production and a 13% net reduced water consumption. In addition, a single wind turbine blade that weighs 7 U.S. tons recycled through this process enables the cement kiln to avoid consuming nearly 5 tons of coal, 2.7 tons of silica, 1.9 tons of limestone and nearly a ton of additional mineral-based raw materials. Largely due to the avoided coal consumption, this type of blade recycling also has a net-positive environmental impact in the categories of human health, ecosystem quality and resource consumption. The resulting cement has the same properties and performance as cement manufactured using traditional means, meeting all applicable ASTM standards.

According to GE, recycling decommissioned wind turbine blades into cement production will aid the cement industry in its efforts to decarbonize. Likewise, GE Renewable Energy is committed to reducing environmental impacts throughout the life cycle of its products, including by announcing an ambitious pledge in 2019 to decarbonize its operations and achieve carbon neutrality by the end of 2020.

RELATED CONTENT

  • Wind turbine blades: Glass vs. carbon fiber

    As the wind energy market continues to grow, competition heats up between glass and carbon fiber composites for turbine blades.

  • Composites 101: Fibers and resins

    Compared to legacy materials like steel, aluminum, iron and titanium, composites are still coming of age, and only just now are being better understood by design and manufacturing engineers. However, composites’ physical properties — combined with unbeatable light weight — make them undeniably attractive. 

  • Out-of-autoclave prepregs: Hype or revolution?

    Oven-cured, vacuum-bagged prepregs show promise in production primary structures.