In June 1997 was defined the strategy of industrial waste management [8]. Due to a new European
classification of hazardous waste [3] and in order to have a more flexible treatment solution, it was
published a new law which established the rules of waste management [9].
In the end of 1999, the Strategic Industrial Waste Plan (PESGRI99) [10] was approved. The goal of
this plan was to prevent and reduce the waste quantities and toxicity through the development of high
technology promoting recovery and recycling centers.