The process assumes a standard impoundment where the ash is extracted wet in a slurry for processing through SonoAsh technology. 

The U.S. Environmental Protection Agency (EPA) has established in its Effluent Limitation Guidelines (ELGs) the imperative for pollutants commonly found in Coal Ash such as mercury, arsenic, or hexavalent chromium not to be discharged.

A key feature of the SonoAsh process is to be able to reuse Coal Ash water repeatedly with only a modest water treatment component for process blowdown.

By installing SonoAsh facilities where variable ash is recovered, 75% of the fraction produced is a uniform, high-quality, beneficiated ash that allows for the industry to address concerns of variable and insufficient quantities of saleable ash in North American construction materiel markets.


The remaining high-carbon fraction collects and accumulates strategic and rare earth metals (REEs) for subsequent recovery.