TM 5-814-3/AFM 88-11, Volume III
a. Aerobic ponds. An aerobic stabilization pond contains bacteria and algae in suspension; aerobic condi-
tions (the presence of dissolved oxygen) prevail throughout its depth. There are two types of aerobic ponds:
shallow ponds and aerated ponds.
(1) Shallow ponds. Shallow oxidation ponds obtain their dissolved oxygen via two phenomena:
oxygen transfer between air and water surface, and oxygen produced by photosynthetic algae. Although the
efficiency of soluble biochemical oxygen demand removal can be as high as 95 percent, the pond effluent will
contain a large amount of algae which will contribute to the measured total biochemical oxygen demand of
the effluent. To achieve removal of both soluble and insoluble biochemical oxygen demand, the suspended
algae and microorganisms have to be separated from the pond effluent.