Abstract: An apparatus for the purification of polluted and/or waste liquids utilizing an oxidative treatment of said polluted and/or waste liquids, said apparatus including a first container adapted to effect recirculation of the liquid while in the first container so that a head space is maintained above the liquid within the first container; said recirculating liquid being drawn from the first container and being reintroduced into the first container through each of at least two jets aligned and positioned to direct said jets flow of liquid, so that this flow will impact against incoming liquid from at least one other of the jets; means for introducing ozone into the recirculating liquid; means for drawing the treated liquid from the first container; wherein each jet including air suction means with an arrangement to integrate such sucked air into the liquid passing through the jet such that the air suction for each jet being connected and effecting a draw of such air from the head space within the container.