Coal Combustion Residuals and Reuse

Photo of men holding concrete mix 
Burning coal results in the production of residuals. These residuals, called bottom ash and fly ash, are collected and removed from the boiler and flue gas. Residuals from air pollution control equipment (called "scrubbers") produce synthetic gypsum. Coal combustion residuals (CCRs) can be used beneficially in cement production or concrete applications or be stored in either a collection pond or a landfill. 

Recycling CCRs Makes Good Sense 
Ameren has recycled on average more than half of our CCRs into beneficial use applications and has been recognized as a leader in CCR recycling. Fly ash is used as a direct replacement for cement or other materials used in the production of concrete. Bottom ash has applications in cement production, blasting grit, and asphalt roofing shingles. Synthetic gypsum can be used as a direct replacement for mined gypsum in the production of wall board and cement production.
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