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Re: Effects of grossly over pitching yeast ?
Posted: Wed Sep 06, 2017 2:33 pm
by HerrBrauer
Re: Effects of grossly over pitching yeast ?
Posted: Wed Sep 06, 2017 2:42 pm
by Owenbräu
Depends on the concentration and yeast strain. Over 75mg/l and one can experience a 2-4 pt difference between the FFT and batch EVG. In this case, we're trying to solve a problem through the process of elimination.
Re: Effects of grossly over pitching yeast ?
Posted: Thu Sep 07, 2017 11:34 am
by Nick_D
Re: Effects of grossly over pitching yeast ?
Posted: Thu Sep 07, 2017 12:40 pm
by Owenbräu
Re: Effects of grossly over pitching yeast ?
Posted: Thu Sep 07, 2017 2:18 pm
by Weizenberg
You may be better off aerating the yeast in a conical flask, then pitch that. If your yeast doesn't score high in viability and vitality, then the cold schedules can become tricky. You don't want to over-aerate either. That can have quite detrimental effects. Without a meter, you are flying blind. I use welding O2.
Re: Effects of grossly over pitching yeast ?
Posted: Fri Sep 08, 2017 12:02 pm
by Nick_D
Re: Effects of grossly over pitching yeast ?
Posted: Fri Sep 08, 2017 2:47 pm
by Weizenberg
I use the original W34/70 from the laboratory in Weihenstephan, but also had great results with the Wyeast equivalent.
Nowadays I propagate on stir plates, then a quick burst of O2 into the flask and then pitch at 5Celsius for a slow rise to 7-8 degrees over the next two days.
I also quite like the W838 from White Labs, but you need to keep sulfites in check. Approx 20-25mgl.
I did write all that up on the blog. There you have the details on cell count etc... If anything is missing, let me know.
Re: Effects of grossly over pitching yeast ?
Posted: Sat Sep 09, 2017 12:42 am
by Nick_D
Re: Effects of grossly over pitching yeast ?
Posted: Sat Sep 09, 2017 12:46 am
by Nick_D
Re: Effects of grossly over pitching yeast ?
Posted: Sat Sep 09, 2017 5:19 am
by Weizenberg