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OxygenationGreg Doss - Wyeast Laboratories
Recommended aeration levels: 8-15 ppm
Aeration Test: Test the efficiencies of common aeration methods.
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Method
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Dissolved Oxygen
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Time
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Siphon Spray
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4 ppm
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0 sec.
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Splashing and Shaking
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8 ppm
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40 sec.
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Aquarium Pump
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8 ppm
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5 min.
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Pure Oxygen with stone
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8 ppm, 15 ppm, 22 ppm
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20 sec., 80 sec., 2 min
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Oxygenation Pure O2 and Stone
DO levels vs. Time
Conclusions - Aquarium pump with a stone is not an effective aeration method. Shaking is effective up to 8 ppm. Pure oxygen is easiest and most effective. A combination of oxygen and shaking can be used.
OG - 1.045
Temp - 68°F
Volume - 5 gal
Fermentor - Standard 5 gal glass carboy
Stone pore size - 2 micron (Liquid Bread Oxynater)
Oxygen Supply - Bernzomatic Oxygen - Flow rate with Bernzomatic was estimated at 3.5 LPM based on a visual comparison of stone activities (vigor of bubbles) with a regulator with gauges on a larger cylinder.
Used by permission
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