| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problem: an aeration means is disposed in a deep layer for the conventional water bloom countermeasures in a closed water area, and in wastewater treatment and the like where an aerobic biological treatment reaction tank of organic wastewater is disposed at a high depth, but knowledge that a circulating flow capable of achieving energy saving is formed by arranging the aeration means in a shallow layer and directly mixing water in a deep layer with surface water has not been disclosed.SOLUTION: Suction pipe whose inflow port sinks under the surface of a closed water area, such as a dam reservoir, a lake, and a sea area, communicates and is connected with the suction port of a circulating pump, and air lift effects by a microbubble generator and a draft tube installed in an aeration device are used together as the water bloom countermeasures and anoxic water mass countermeasures in a dam reservoir, a lake, a sea area, and the like. The same means can be applied to aeration treatment, solid-liquid membrane separation treatment, and ozonolysis treatment of refractory wastewater in biological treatment of the organic wastewater in the treatment tank disposed at high depth. |
