Oxygen can be supplied via air (aeration/degassing) or pure oxygen (PSA, LOX, cylinders). Air is cheap but gives limited ΔDO. Pure oxygen raises ΔDO and can cut required water flow — at the cost of energy or logistics.
Common solutions
- Aeration via degasser/diffusers — cheap, limited ΔDO.
- PSA — on-site oxygen generation.
- LOX — liquid oxygen; flexible but logistics-dependent.
- Oxygen cones / LHO — efficient transfer of pure oxygen into water.
Best practice: maximise air-side uptake in degassers, add pure oxygen to raise total ΔDO — do not replace all air oxygen with gas. Size emergency reserve separately. See backup power.
See also