By 2021, the total electric waste is estimated to reach 52.2 million metric tons, and the majority of the waste cannot be appropriately recycled
With an increase of electronic equipment production, it is rapidly becoming the fastest growing waste stream in the world. If this electronic waste is not handled correctly it could result in many health problems. Most of this electronic waste cannot be recycled. This paper discusses the uses of pyrometallurgical, hydrometallurgical, and biohydrometallurgical means to separate metals from electronic waste.