 The large possible variation in calorific value and composition of the waste require a highly complex automatic control during the thermal treatment that must take into account both the reliability of the process and the requirements of environmental protection.Since the requirements of environmental protection and the reliability are contradictory to each other, there must be compromising solutions that are mutually acceptable for both sides.The parameters of O2 and CO concentration and fire room temperature are the main basic variables to be controlled when designing the process.