Improvements in facilities for the treatment of sewage, of the type that comprises oxidative purification by aerobic fermentation, characterized by consisting of a structure formed by two tanks, respectively oxidation and decantation, communicated with each other in such a way that a transfer is effected continuous and regulated from the first to the second, the latter being connected to a spill tank to the outside by an overflow, while the first is a sewage collector through an upper slab; and because said oxidation tank has, submerged below, a battery of air diffusers, from blowers of regulated flow, whose air produces a movement of the liquid mass to be cleaned, directed, by deflector screens, towards the wall adjacent to the tank decanting, whose material transferred to this tank sediments forming biologically active sludge that, by means of pumps with submerged diffusing head, is returned to the oxidation tank, while the decanted water passes to the outside. (Machine-translation by Google Translate, not legally binding)
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