Abstract: A process for treating wastewater in a dynamic bio-sequenced manner in a single SBR reactor already filled with an activated sludge mixed liquor. In this process which is simple, fast and biologically and hydraulically "on going" and which allows one single SBR reactor to process typically twice as many batches of water per day as is presently processed within the existing SBR process, a given amount of wastewater rapidly introduced into the SBR reactor below the clear water level to cause the level of the wastewater within the tank to raise relatively uniformly and vertically and the supernatant clarified water to enter decantation pipes and be discharged out of the reactor. Then, the scum floating on top of the wastewater is collected and discharged and the mixed liquor is mixed and aerated as long as necessary to achieve the required treatment.

Abstract: A jet aeration header is disclosed, for use in water and wastewater process and treatment system. The header comprises a first pipe defining a cylindrical water passage, a second pipe extending parallel to the first pipe and defining a cylindrical air passage, at least one water outlet conduit connected to the first pipe to allow water to be expelled out of the water passage, an air-feed pipe connecting the second pipe to the outlet conduit to allow air to be delivered from the air passage to the water flowing through this conduit, and a venturi cone mounted in the outlet conduit to allow air to be FED from the air passage and be mixed with a water expelled through the outlet conduit.