The denatured alcohol production process, located in a dedicated building, consists in the addition to ehyl alcohol of components specifically provided by the Customs Authorities to make it suitable for the purpose for which it will be destined and, at the same time, not suitable for human consumption. It is an “in-line denaturation” plant, which means that the exact quantity of the authorized denaturant is added to the ethyl alcohol by an electronic dosing system, directly at the time of the tanker loading.