Greg Doss - Wyeast Laboratories
Recommended aeration levels: 8-15 ppm
Aeration Test: Test the efficiencies of common aeration methods.
|Siphon Spray||4 ppm||0 sec.|
|Splashing and Shaking||8 ppm||40 sec.|
|Aquarium Pump||8 ppm||5 min.|
|Pure Oxygen with stone||8 ppm, 15 ppm, 22 ppm||20 sec., 80 sec., 2 min|
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