| 摘要 |
<p>A particular quantity of air defined by the capacity of an air supply chamber (2) is supplied for forming an individual air bubble (19) which rises through a tubular passage (1) having a particular diameter, at least 30 cm, thereby raising water under its suction and boosting actions. The chamber (2) has a volumetric capacity 0.5 to 3.0 times the spheric volume having the diameter of the passage (1). The capacity of the chamber (2) is selected to determine the rate at which each formed air bubble is to rise through the passage (1), thereby improving efficiency.</p> |
