Abstract
Treatment experiments were conducted to evaluate the applicability of a high-temperature melting treatment (GeoMelt process) as a safe treatment of polychlorinated naphthalene (PCN) formulation. We started with a 10-kg-scale experiment. Subsequently, we progressed to a 1000-kg-scale experiment in which a melting furnace resembling an actual treatment system was used. Destruction efficiency values and the target levels of PCNs and polychlorinated dibenzo-p-dioxins/furans (PCDD/DF) in vitrified materials, exhaust gas, and treated scrubber water samples were achieved in these runs. Therefore, we believe that PCN formulation can be treated using the GeoMelt process with an actual treatment system. We conducted a treatment experiment using an actual treatment system and confirmed the destruction of PCNs. Based on good results of the verification experiment, approx. 5,400 kg of PCN formulation stock was treated using Geomelt processing from September through December in 2012.
