| 摘要 |
<p>PURPOSE:To improve the aeration of water by sending air to the surface of water by an electric fan in such a state that water in a treatment tank is pushed up to the surface of water by a stirrer to replace internal water with surface water. CONSTITUTION:A tank 2 made of filter cloth is put in the water tank 1 outside a biological treatment tank and, when dirty waste water is introduced into the tank 2, the water in the treatment tank is flowed out from a drain port 3 through the filter cloth while pushed by inflow water. The water in the treat ment tank is flowed toward the surface of water from below by a stirrer 4 and always replaced so as to reach the surface of water. In this state, air is sent to the surface of water by an electric fan 5. By this method, the aeration in water can be extensively performed and treatment efficiency is enhanced.</p> |
