Keywords: Metals recycling, Scrap metal, PET recycling, Post-consumer PET, Optoelectronic sorting, Metals sorting systems, wTe, UltrePET,S pectramet, Melt Cognition, Environmental businesses, M. Scott Mellen, David B. Spencer, Leigh A. Pertiz, Stephen M. Turner, Carol C. Forman, Paul Zordan, Ed Wrisley