Treatment of Residues from Air Pollution Control Systems

The residues from air pollution control systems on waste incinerators are typically deemed to be a hazardous material due the potential for leaching of trace metals and salts. As a result, in many countries these residues require special handling, treatment and/or disposal. An innovative technology has been developed to recover useful by-products from these residues and render the remaining residue non-hazardous, thereby eliminating the long-term environmental liability associated with disposing of these materials. The primary by-products of the patent pending APEX Treatment System include, a non-hazardous calcium enriched solid suitable for construction applications, a highly concentrated lead residue suitable for recycling to smelters and a commercial grade calcium chloride solution. This paper focuses on the results from a large­ scale demonstration project.