| Diffused Aeration | Air is introduced into the wastewater through diffusers, creating fine bubbles that enhance oxygen transfer. | Efficient oxygen transfer, lower energy consumption, and good mixing. | Activated sludge systems, lagoons, and secondary treatment. |
| Surface Aeration | Mechanical surface aerators draw air from the atmosphere and mix it with the wastewater, promoting oxygen absorption. | High oxygen transfer rates, simple operation, and capable of handling variations in water quality. | Ponds and lagoons, particularly in warmer climates. |
| Submerged Aeration | Submerged aerators operate below the water surface, facilitating constant oxygen supply through adjustable air flows. | Less odor, reduced noise, and better oxygen transfer efficiency. | Aeration tanks in municipal and industrial wastewater treatment plants. |
| Aerated Lagoon | Natural lagoons combined with mechanical aeration to enhance biological treatment processes. | Cost-effective, good for large volumes, and suitable for various wastewater qualities. | Treatment of municipal wastewater and agricultural runoff. |
| Jet Aeration | Uses high-velocity jets of air to create mixing and aeration in the wastewater stream. | High mixing efficiency and flexibility in system design. | Suitable for various industrial applications and municipal treatment systems. |