| 摘要 |
<p>Sewage aeration process and apparatus wherein substance to be treated is contained within a tank 1, preferably cylindrical in shape, the tank having means for entry of air to form bubbles within the substance in the tank 1 and means for producing recirculating flows through a coaxial open topped tube 2 leading to pumping mechanisms 4 which return the flows to the tank 1 at a lower level therein, through pipes 5. <IMAGE></p> |
