This is a ceramic lined melter that produces a glass product. Temperature in the glass pool is maintained by joule-heating (electrical resistance heating). The joule heating is accomplished by passing alternating current directly through the molten waste glass. The energy consumed to push the current through the melts is absorbed into the melt as heat. The vitrification process uses heat to decompose waste into elemental oxides that dissolve into a glass pool. The glass is poured into a container where it cools. As the glass cools, it passes through its glass transition temperature, where the physical characteristics of the material change from a state where some amount of physical change can be imparted on it without fracture to a hard, brittle substance and where large-scale molecular motion is not possible.