Definition - What does Reaeration mean?

Reaeration is the process of adding oxygen to sewage waste products to prevent the formation of anaerobic conditions that give rise to foul odors and harmful gasses. Sewer systems and rising mains can develop critical conditions which can cause septicity, toxicity, corrosion, and odors. An efficient way to control these conditions is by maintaining a sufficient supply of oxygen to the system.

Trenchlesspedia explains Reaeration

All pipelines carrying waste water below ground level produce a dynamic system of biological processes that give rise to toxic gasses and noxious odors. This is mainly caused by anaerobic conditions prevalent in closed sewer systems due to lack of oxygen. Introducing oxygen through the process of reaeration creates aerobic conditions by oxidizing these undesirable compounds through metabolic processes. Using pure oxygen or air has the same result, but one fifth volume of pure oxygen is required as compared to air because of other gasses, which can cause turbulence.

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