STAR® Technology

Making A Positive Difference

STAR®  Technology is our patented thermal beneficiation process that transforms coal ash from ponds, landfills, and production material into a consistent, high-quality product for the concrete industry and other industrial applications. Our process provides a permanent solution to remove coal ash from the environment.

Reclaiming And Recycling Coal Ash

The STAR® Technology solution to coal ash pond closure is a sustainable option that offers decades of multiple benefits. Excavation and beneficiation with STAR® Technology offers a permanent solution with total environmental success, as coal ash is eliminated. All coal ash removed is transformed into a new, environmentally-responsible material.

SEFA’s STAR® Technology transforms by-product waste material into recycled ash for industrial and municipal applications. The process removes contaminants and provides a reliable raw material that meets or exceeds all specifications for additives in concrete. The process is self-sustaining and exothermic, meaning no external fuel source is required for continuous treatment.


Best Practice

STAR® Technology is a stand-alone, cost-effective solution. Coal ash is transformed to be recycled and encapsulated in concrete. This beneficial use meets or exceeds specifications and requirements for product quality of concrete.

Permanent Solutions

Coal ash is permanently removed from the environment as it is excavated, processed, and then encapsulated for beneficial use in concrete.  This eliminates long-term liability and concerns about groundwater pollution.


Removing coal ash from ponds and converting the material for recycled use has a variety of economical and environmental benefits. It lowers greenhouse gas emissions in the production of concrete and reduces the use of limited natural resources.

Transformative Sustainability

Embedded In Our Culture

SEFA has recycled over 20 million tons of fly ash in the last 30 years that would have otherwise gone into landfills or ponds, and we were the first company in the world reclaiming and recycling coal ash from ponds for concrete. SEFA has a strong heritage of unsurpassed service to its customers in an environmentally sensitive and sustainable manner.

Transformative Innovation

For four decades, The SEFA Group has been adept at stimulating innovation and new service offerings that can further contribute to customers’ success and environmental stewardship. Through SEFA’s determination, STAR® (Staged Turbulent Air Reactor) Technology was developed to provide the Company’s ready-mixed concrete customers an uninterrupted supply of recycled fly ash by utilizing and eliminating ash currently stored in impoundments.

The heartbeat of SEFA is innovation, and the Company will continue to develop technologies, engineer processes, and invest in equipment that makes a positive environmental difference for the future.