| aeration | <physiology> To add air or oxygen into a liquid. (06 May 1997) |
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| aeration basin | A basin where oxygen is supplied by mechanical agitation or pneumatic means to enhance the breakdown of wastes held in suspension. (05 Dec 1998) |
| cascade aeration | Aeration of an effluent stream through the action of falling water. (05 Dec 1998) |
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| post-aeration | The introduction of oxygen into waste water to further reduce BOD and COD after secondary or advanced treatment. (05 Dec 1998) |