REUSE OF AGGREGATE

Following the extraction of metals from the ash using our Advanced Metal Recovery (AMR) process, a relatively metal-free residual (or aggregate) will remain. 

Traditional practice in North America has been to manage the aggregate as a waste and to dispose of it in a regulated Subtitle D sanitary landfill. Such tradition is being reexamined in Florida, with several recent approvals from the Florida Department of Environmental Protection for the beneficial reuse of municipal waste combustor ash. 

Our AMR technology compliments incinerator ash mineral aggregate beneficial reuse by improving the materials characteristics of the mineral aggregate for advanced reuse opportunities.

For some of the recently approved reuse opportunities, it has been determined that residual metal content has the potential to impact the physical characteristics of the aggregate and the resultant end product (such as Portland Cement Concrete). For example, trace concentrations of metals missed by the traditional metals recovery equipment used at the Resource Recovery Facility have the potential to negatively impact the materials properties of products utilizing municipal waste combustor ash in beneficial reuse applications. Our AMR technology reduces this risk, and in doing so, enhances the viability of beneficial reuse opportunities such as:

• Alternative to limestone as a road base material
• Alternative to granite as a concrete aggregate
• Alternative to coal combustion residuals as a cement kiln feed ingredient