Abstract: A comprehensive and independent unit for the treatment of Effluents or Sewage and the system that uses it. This unit requires little space and it has a high capacity to mitigate effluent parameters. This treatment is performed by means of a single reactor which carries out the electrocoagulation, electro flocculation, electro flotation, electrooxidation and electrohydrolization and it drains in a high performance decanter which is a single container. The unit is composed of a reactor (4) that sends its clotted effluents into a decanter (5) and its foam into a foam collector (6). The decanter (5) is placed adjacent to the foam collector (6) and has the capacity to discharge its foam into the collector (6); the whole process is carried out without the need for any auxiliary recirculation devices.