Temperatures effect on fermentation time

[Scriv]

Does temperature have an effect on the length of fermentation? I ask because my first homebrew was fermented in my closet in the high 60's to low 70's and I had activity for almost 2 weeks. Now on my second brew its in a fridge controlled at 64 degrees all the time, and after 6 days it seems to be just about done.

Does the fermentation take longer in warmer temps?

 

[wtaylor3]

Fermentation should be faster in warmer temps actually.

That being said, there are many other factors to consider though. Are the yeast strains the same? Difference in beer styles, higher or lower gravity, etc.

 

[Black Island Brewer]

Generally the opposite is true. Warmer ferments faster. However, there can be many other variables, including yeast strain, gravity of wort, pitching rate, and oxygenation. But all things being equal, warmer=faster.

 

[Scriv]

Yeast for both was the same, Safale US05. However, the first brew was a mild blonde ale, this second is a double IPA.

First brew was 1.046 og, second is 1.086.

 

[lharms]

Can anyone help me out on this temperature question I have? I'm going to make a fermenter chiller. I've order my stc1000 and still working on getting a mini fridge. But I was wonder what a good heat source I could use in the chiller to keep the temp consistent or do I even need one?

 

[Scriv]

I have one of these in my mini-fridge, works great!

http://www.williamsbrewing.com/mobile/BREWERS-EDGE-SPACE-HEATER-P518.aspx

Whether you need one or not, depends on how cold it gets at night where your fermenter is. My garage gets into the 50's, so it gets used!

 

[BigFloyd]

Yeast for both was the same, Safale US05. However, the first brew was a mild blonde ale, this second is a double IPA.

First brew was 1.046 og, second is 1.086.

Therein lies the difference, especially if you pitched only one packet into that 1.086 DIPA. A beer that big ought to get two rehydrated 11g packets.

 

[Scriv]

Therein lies the difference, especially if you pitched only one packet into that 1.086 DIPA. A beer that big ought to get two rehydrated 11g packets.

Alright, anything I can do 6 days in? I do have another pack of US05.

 

[RM-MN]

Alright, anything I can do 6 days in? I do have another pack of US05.

Yes, you can be patient and give the yeast all the help that you can by controlling the temperature of the fermenter. Since the visibly active part of the fermentation is over, let your beer warm to the low 70's to encourage the yeast to complete the cleanup. You may see activity in the airlock but it will be from the CO2 dissolved in the beer coming out of solution because at this point of the fermentation the yeast are in the silent phase and give off no CO2.

 

[jethro55]

So the high gravity beer that was fermented at a slightly lower temperature was at FG much quicker than the mild?

Am curious - is this based on hydrometer reading?

Could it be stalled from underpitch? Can S05 handle that much ABV?

 

[Scriv]

I've read it can go as high as 12%, so 8 shouldn't be a problem. I'll give it more time and bump the temp up slightly.

 

[pablosbrewing]

Take a reading to check if it's actually stuck. Every yeast party is a little different.

Definitely raise to 70F for a couple of days as RM-MN suggested.

http://www.mrmalty.com/calc/calc.html

 

[BigFloyd]

Alright, anything I can do 6 days in? I do have another pack of US05.

Just let it be. Pitching another packet at this point will profit you nothing.

 

[Scriv]

Take a reading to check if it's actually stuck. Every yeast party is a little different.



Definitely raise to 70F for a couple of days as RM-MN suggested.



http://www.mrmalty.com/calc/calc.html

I pulled a sample just now, it's at 1.016. I've bumped the fridge up to 70, and was thinking I might cold crash it on Friday and bottle on Saturday.