Recuperative Thermal Oxidizers utilize heat recovered from incorporating waste heat boilers, combustion air / waste gas preheaters, hot oil heaters downstream of the Thermal Oxidizer. When the energy recovered is collected via heat exchangers in the flue gas duct leaving the unit, the Thermal Oxidizer becomes a waste-to-energy unit (WTE Unit) able to transfer thermal energy from the oxidation process to other plant utilities, in turn reducing auxiliary fuel consumption, emissions and operative costs.