Use of oxygen-filled enclosures for aeration and degassing
Fisheries Bioengineering Symposium: American Fisheries Society Symposium 10
Colt J;White RJ;
American Fisheries Society
Surface aerators are used as temporary and permanent systems to add oxygen to and remove nitrogen gas from hatchery waters. Rates of gas transfer across a water-gas boundary are greater for an oxygen-enriched atmosphere than for air. We compared an enclosed agitator, a pumped spray, and diffusers (airstones) with respect to oxygen absorption efficiency and nitrogen stripping over a range of influent gas (oxygen or air) flow rates. Results indicate the enclosed agitator, receiving oxygen, can be used as a low-cost, portable oxygenation and degassing system.