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Production of Gas Supersaturation by Aeration
Author(s) -
Colt John,
Westers Harry
Publication year - 1982
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1982)111<342:pogsba>2.0.co;2
Subject(s) - aeration , supersaturation , environmental science , production (economics) , chemistry , pulp and paper industry , economics , engineering , organic chemistry , macroeconomics
The use of submerged aerators in hatcheries can produce lethal concentrations of dissolved gases. Because the mass‐transfer relationships for oxygen, nitrogen, and argon are similar, the aerators with the highest oxygen transfer efficiencies also produce the highest concentration of total dissolved gas. The dissolved‐gas concentrations produced by aeration depend on ΔS ∞ , the percent gas supersaturation in the aeration basin after a long period of aeration divided by the depth of the aeration basin; N 0 , the standard transfer efficiency; the depth of the aeration basin; and the number of aerators used in series. The effect of these parameters on dissolved‐gas concentrations are presented for conditions typical of trout and salmon hatcheries. The prevention of lethal and sublethal gas concentrations will result in a significant decrease in the efficiency of submerged aeration systems for oxygen transfer in aquaculture.