Microwave Vitrification of Waste

recovers valuable metals
from electronic circuitry

Microwave Vitrification of Waste
This invention uses microwave energy to
process electronic circuitry, equipment, and computers. This method enables the
recovery of valuable metals and reduces the volume of waste for ultimate disposal.

Market Assessment
In the U.S., 65,000 cell phones are discarded each year. An estimated 315 million computers were discarded in 2004. Electronic equipment contributes significant levels of mercury, arsenic, cadmium, and selenium to landfill leachate. These toxic materials pose a health threat when they are released into the environment. With its ability to reduce the volume and weight of electronic components and to recover precious metals contained therein, the technology should have a significant market.

Patent Status
U.S. Patent Nos. 6,262,405, 5,968,400, 5,891,011, and 5,843,287 have been issued on this invention.

Stage of Development
A prototype was developed to test this method with a variety of material mixes at the Savannah River Site. Materials tested
include high level radioactive waste, simulated transuranic waste, used truck tires, various types of discarded circuitry,
weapons components, and various
medical wastes.

Contact
Dale Haas, Licensing Associate
(803) 725-4185
dale.haas@srnl.doe.gov

For More Information
See tech brief.