roflbrew
Member
I use a sintered diffusion stone and pure O2 to aerate the wort prior to pitching and fermentation. I ran some back of the napkin calculations and wanted to check that I'm on the right track with how long I should be aerating:
I'm aiming for 8 ppm (=8mG/L) in a 5 gallon batch (it helped me to work in metric):
8 mg/L in a 18.93 liter batch.
To convert oxygen from mg/L to mL/L I used the following formula: mL/L = mg/L x 0.69978
So:
8mg/L = 8 * 0.69978
= 5.59 mL/L
For a 18.93 L batch, that is equivalent to (5.59 * 18.93) = 106 mL total dissolved oxygen.
If I set my oxygen flow meter to 1 liter per minute, I should be able to achieve the target 106 mL (or 8ppm) in about 6 seconds.
Of course, there's a an assumption here that 100% of the oxygen being introduced ends up dissolved in the solution so I could run it a little longer - but does this sound about right? It sounds a lot lower than most of the recommendations I've read so I wanted to double check. Thanks!
I'm aiming for 8 ppm (=8mG/L) in a 5 gallon batch (it helped me to work in metric):
8 mg/L in a 18.93 liter batch.
To convert oxygen from mg/L to mL/L I used the following formula: mL/L = mg/L x 0.69978
So:
8mg/L = 8 * 0.69978
= 5.59 mL/L
For a 18.93 L batch, that is equivalent to (5.59 * 18.93) = 106 mL total dissolved oxygen.
If I set my oxygen flow meter to 1 liter per minute, I should be able to achieve the target 106 mL (or 8ppm) in about 6 seconds.
Of course, there's a an assumption here that 100% of the oxygen being introduced ends up dissolved in the solution so I could run it a little longer - but does this sound about right? It sounds a lot lower than most of the recommendations I've read so I wanted to double check. Thanks!