Aerating after yeast pitched?
Posted: Thu Nov 26, 2009 9:03 pm
by BigNastyBrew
In the last Zymurgy (Dark Side of Lagers), the author mentions aerating twice the rate you normally would for the bigger lagers. Ok, I get that. But then in the article, it says you may even consider aerating again the next day.
I know in a lager that yeast are most likely still going through propagation phase a day later but would you really want to aerate again and a day later? Or do you think they're getting at more yeast growth? If so, is pitching at the right rate going to negate this "next day aeration"?
Re: Aerating after yeast pitched?
Posted: Fri Nov 27, 2009 12:31 pm
by brewinhard
I would probably not aerate the next due simply b/c I have never needed to with a lager. I would think a sufficient sized starter should be able to get the wort fermenting without the extra day's oxygen. Although I have heard of people aerating big beers more than once before fermentation gets rolling.
Re: Aerating after yeast pitched?
Posted: Fri Nov 27, 2009 2:57 pm
by Mylo
I try to give it a 2 min shot of O2 every 6 hours until I see a krausen start to rise.
Mylo
Re: Aerating after yeast pitched?
Posted: Fri Nov 27, 2009 3:51 pm
by BigNastyBrew
Mylo wrote:I try to give it a 2 min shot of O2 every 6 hours until I see a krausen start to rise.
Mylo
My lagers have been taking 3 days to form krausen.
Re: Aerating after yeast pitched?
Posted: Fri Nov 27, 2009 7:05 pm
by Mylo
BigNastyBrew wrote:Mylo wrote:I try to give it a 2 min shot of O2 every 6 hours until I see a krausen start to rise.
Mylo
My lagers have been taking 3 days to form krausen.
Prolly not enough healthy yeast. I just pitched my vienna, and had a decent krausen within 24 hours.
Mylo
Re: Aerating after yeast pitched?
Posted: Fri Nov 27, 2009 11:27 pm
by Dmp
I have a beer krausining and there wasn't a whole lot of head space in the fermentor for oxygen so I just opened her up and let some air in and then mixed it around... I'll let you know if the beers keep, or oxidize after bottling
Re: Aerating after yeast pitched?
Posted: Sat Nov 28, 2009 6:20 am
by BigNastyBrew
Mylo wrote:BigNastyBrew wrote:Mylo wrote:I try to give it a 2 min shot of O2 every 6 hours until I see a krausen start to rise.
Mylo
My lagers have been taking 3 days to form krausen.
Prolly not enough healthy yeast. I just pitched my vienna, and had a decent krausen within 24 hours.
Mylo
You pitch at 45° and let it rise?
Re: Aerating after yeast pitched?
Posted: Sat Nov 28, 2009 10:42 am
by Mylo
BigNastyBrew wrote:You pitch at 45° and let it rise?
Nah, on this particular one I pitched at 55. It was down at 50 when ferm started.
Mylo