Author Topic: pH and the effect on hop flavors.  (Read 2379 times)

Offline watai0102

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Re: pH and the effect on hop flavors.
« Reply #15 on: July 25, 2017, 02:06:15 AM »
The pH of fermenting beer drops very rapidly once fermentation begins, usually getting close to its final value after 24 h. In general, ales have a slightly lower pH than lagers; typical values for ale are 4.0-4.5, for lager 4.4-4.7. Each yeast strain, however, has its own characteristics. If you usually work with only a few strains of yeast, you may want to check the pH of your fermented beers to get an idea of what your yeast is giving you. If the pH goes up or down over successive batches, it may be a symptom of contamination and a signal to go to a fresh yeast culture. This can be especially valuable because you may not notice a gradual change in your beer, especially if it is slow and not terribly obnoxious in character.

Offline curtdogg

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Re: pH and the effect on hop flavors.
« Reply #16 on: July 25, 2017, 02:12:32 AM »
The pH of fermenting beer drops very rapidly once fermentation begins, usually getting close to its final value after 24 h. In general, ales have a slightly lower pH than lagers; typical values for ale are 4.0-4.5, for lager 4.4-4.7. Each yeast strain, however, has its own characteristics. If you usually work with only a few strains of yeast, you may want to check the pH of your fermented beers to get an idea of what your yeast is giving you. If the pH goes up or down over successive batches, it may be a symptom of contamination and a signal to go to a fresh yeast culture. This can be especially valuable because you may not notice a gradual change in your beer, especially if it is slow and not terribly obnoxious in character.
I did notice how fermentation temp made a huge diffrence. So much more to learn.

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Offline toby

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Re: pH and the effect on hop flavors.
« Reply #17 on: July 25, 2017, 03:37:39 AM »
In general, ales have a slightly lower pH than lagers; typical values for ale are 4.0-4.5, for lager 4.4-4.7.

Where are you getting your numbers? IME, those numbers are flipped (lagers finishing in the high 3s to low 4s and ales in the low to mid 4s).

Offline mabrungard

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Re: pH and the effect on hop flavors.
« Reply #18 on: July 25, 2017, 12:24:07 PM »
IME, those numbers are flipped (lagers finishing in the high 3s to low 4s and ales in the low to mid 4s).

No, those original numbers are more typical. Ale yeasts produce lower pH's than lager yeasts. But there are occasional exceptions.
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