Hot answers tagged yeast
I think what you made is safe, but there's no way to not produce alcohol with that method.
It it not a necessary step. (Neither is "secondary", usually.) [EDIT: I missed a potential misconception you have about transfering the yeast when kegging:] Usually, you will attempt to minimize how much yeast you transfer into the kegs, as instead of using priming sugar and yeast to carbonate, you can force-carbonate by applying direct and measured CO₂ ...
Strictly speaking, as long as you can ensure adequate and even oxygen contact with all of the yeast cells (a hard task, given the viscosity of yeast slurry), and provided the oxygenation comes directly before pitching, oxygenating the yeast/slurry itself is completely sufficient to provide for adequate growth in the following phase. Even more strictly ...
There's only so much oxygen that the N-hundred billion cells that you pitch can "hold". As well, there's only so much oxygen that can be diffused into the liquid containing those cells. And not only will those pitched cells need more oxygen, but their offspring cells will need oxygen, as well. As such, we oxygenate the wort, not just the pitch.
Sure. This amounts to a large starter, so you may be slightly overpitching, but I've used the yeast cake from a 5 gallon batch to ferment another 5 gallon batch and had no issues. Depending on the style you are brewing, this could change the flavor somewhat, so to get an optimal pitching rate you could use a yeast calculator and discard part of your yeast ...
There's no reason to dump a beer that isn't contaminated. After 1.5 weeks and a trip to 80F, the beer should be done fermenting. And warm temps late in fermentation have little impact on flavor. You can try stirring up the yeast, but a re-pitch of active yeast is probably worth doing. If you can make a starter that would really help, since the partly ...
The Wyeast smack packs have a small nutrient pouch inside the main pouch (which contains the yeast slurry). The nutrients will cause the yeast to "wake up" and consume the sugars in the nutrient liquid, causing the swelling. However, this is a function not only of the yeast, but also of the date of manufacture, the viability/vitality of the yeast and the ...
No worries...05 will perform fine without anything special. Rehydrate it for best performance and then just toss it in. I've gone to 12% ABV with it with no issues. But my question is, how do you know it's the yeast? Why isn't it a fermentability of wort issues? Tell us more about your recipe and procedure in order to help figure out what's going on.
Make a starter ASAP. That is the only way to know if anything survived. Chances are slim as the frozen cells rapture when frozen. If the starter picks up, then step it up and harvest from that. If you want to freeze your yeast you need special "anti-freeze" so that the cells do not rapture.
The viability will have been seriously affected you may have some OK cells in there, but the formation of ice crystals with in the cells will have ruptured the majority of the cells. You may be able to make a starter from it.
A yeast starter is essential to making sure there are enough live yeast at pitch time to complete fermentation. You might want to make a starter for several reasons, including: Unsure of yeast viability due to age or temperature swings. If you've ordered liquid yeast during the summer months and you're unsure if the high heat may have killed some off, ...
Most likely a wild yeast infection which could easily contain some of those strains and have the potential to be a positive in a Berliner, or not...(plastic, bandaid, and phenolic flavors possible). It does Look like a pellicle for sure! I would say if it smells rancid don't try it, if it taste terrible don't drink it, that's the best advice given to me on ...
Although I do not know the exact process, if sterility is the aim, it seems that all that is required is to create a positive air pressure sterile box(PAPSB). This can be done with lexan, a strong fan, and a few high grade HEPA filters. You can create a near sterile environment in this manner with the aid of a strong sanitizer and UV lights. Using this PAPSB ...
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