n.通气；充气
This is true for BOD removal, aeration and biological growth. 这对生化需氧量的去除，通气，生物生长都是适用的。
Finally, examples of the device of cyclone aeration flotation are illustrated. 最后给出了旋流充气气浮的污水处理装置的应用实例。
n.排气(通风)
