Patent ID: 6787036
Filing Date: 2004-09-07
Classification: C02F,Y02W

Abstract:
A method of aerating wastewater to enhance aerobic treatment comprising:a) introducing a wastewater stream into an upper level of a vessel and down into the path of vertically oriented perforated vanes arranged to rotate in the vessel about a vertical axis; b) rotating the vanes and impinging the vanes at a right angle against the waste water stream with sufficient force to temporarily divide at least part of the wastewater stream into a fine droplet mist, the dividing of the waste water stream into the fine droplet mist and resulting surface area expansion creating a negative pressure within the vessel; c) drawing atmospheric air in to the vessel in response to the negative pressure, the air drawn into the vessel intimately mixing with fine droplet mist and becoming entrained in the mist and forming relatively small bubbles as droplets in the mist coalesce thereby facilitating the dissolving of atmospheric oxygen into the wastewater and enhancing the oxygen content of the wastewater; and d) expelling the now oxygen enhanced wastewater from a lower level of the vessel under the influence of a pumping action produced by the rotating vanes.