Banana flavor - Contaminated yeast? - Home Brew Forums
Register Now For Free!

Home Brew Forums > Home Brewing Beer > General Techniques > Banana flavor - Contaminated yeast?

Reply
 
Thread Tools
Old 04-15-2008, 12:02 PM   #1
Aust1227
Recipes 
 
Jan 2008
Posts: 111


Got an issue I need to talk through. Your advice is encouraged.

A few months ago I used some SafeAle-05 to make a real good pale ale. I washed the yeast and put it up in mason jars in the fridge.

I have made two beers with the saved yeast since then. They have both tasted like bananas!!

I ferment my beer in stainless steel inside a fermentation cooler, so I can't imagine that the esters are picked up from high temps. And I have made a few ales with exactly the same equipment in the same timeframe from other yeasts that have turned out well.

Anyone ever heard of a contamination leading to Banana flavor? Am I missing some other way to pick up this flavor? Would you toss all your saved yeast and start fresh?

What is the best way to isolate my issue. I am thinking about using some LME and make up few one gallon batches (in old cider jars) to try to see if I get the banana flavor out of the questioned yeast..

Very frustrating to have a good beer go bad!!

 
Reply With Quote
Old 04-15-2008, 12:06 PM   #2
EdWort
HBT_LIFETIMESUPPORTER.png
 
EdWort's Avatar
Recipes 
 
Jul 2006
Bee Cave, Texas
Posts: 11,912
Liked 342 Times on 169 Posts


Why would you go through all that effort to save $1.59 on a packet of dry yeast and risk your batch of beer?

Toss it and spring for another packet of yeast.

 
Reply With Quote
Old 04-15-2008, 12:11 PM   #3
MikeFlynn74
 
MikeFlynn74's Avatar
Recipes 
 
Nov 2007
ANCHORAGE!!
Posts: 3,876
Liked 19 Times on 17 Posts


Quote:
Why would you go through all that effort to save $1.59 on a packet of dry yeast and risk your batch of beer?
Who the hell washes dry yeast? A guy who likes BANANAS!
__________________
Quote:
If you find yourself going through hell, keep going- Winston Churchill
Quote:
Originally Posted by Tenchiro View Post
The successful have nobody to blame but themselves, I really wish they would take some responsibility for their own actions...

 
Reply With Quote
Old 04-15-2008, 12:36 PM   #4
Aust1227
Recipes 
 
Jan 2008
Posts: 111

Quote:
Originally Posted by EdWort
Why would you go through all that effort to save $1.59 on a packet of dry yeast and risk your batch of beer?

Toss it and spring for another packet of yeast.
Money isn't really the issue here. I enjoy washing yeast, canning my own salsa, growing my own hops, learning to wire 220, ext.. None of that stuff saves me money, but I do it for the hell of it.

Back to the issue. The reason I would like to isolate the problem is so that I can feel better about my fermenter and the cleanliness of all other pieces of equipment I am using. As a girlfriend of mine once stated "I just need closure".

 
Reply With Quote
Old 04-15-2008, 12:36 PM   #5
Aust1227
Recipes 
 
Jan 2008
Posts: 111

Quote:
Originally Posted by MikeFlynn74
Who the hell washes dry yeast? A guy who likes BANANAS!
Have you heard of this problem before? Is this why people don't usually wash dry yeast?

 
Reply With Quote
Old 04-15-2008, 12:42 PM   #6
MikeFlynn74
 
MikeFlynn74's Avatar
Recipes 
 
Nov 2007
ANCHORAGE!!
Posts: 3,876
Liked 19 Times on 17 Posts


Aust

try new yeast- if the problem is gone then its the washing of the yeast. Its just too cheap to even bother with and creating these types of issues.
__________________
Quote:
If you find yourself going through hell, keep going- Winston Churchill
Quote:
Originally Posted by Tenchiro View Post
The successful have nobody to blame but themselves, I really wish they would take some responsibility for their own actions...

 
Reply With Quote
Old 04-15-2008, 12:49 PM   #7
Soperbrew
Who rated my beer?
HBT_LIFETIMESUPPORTER.png
 
Soperbrew's Avatar
Recipes 
 
Feb 2008
Chandler, Arizona
Posts: 2,460
Liked 90 Times on 84 Posts


I think the first step would be to do another batch with a fresh yeast pack leaving all other variables the same. If no bananas then it's something with the washed yeast.

Would warm temps during yeast washing cause banana flavor? Could it happen if the boiled water was still warm when added to the yeast cake?

 
Reply With Quote
Old 04-15-2008, 01:15 PM   #8

As others have said, I'd start anew. Just guessing here, but it sounds like either some form of wild yeast found it's way into your washed yeast or the yeast was stored at very warm temps. If it was wild yeast, then you may want to save that washed yeast for your own version of a 'house Hefe'! Some people actually leave their beer out in open fermenters to achive that flavor profile.

 
Reply With Quote
Old 04-15-2008, 01:28 PM   #9
TexLaw
Here's Lookin' Atcha!
HBT_LIFETIMESUPPORTER.png
 
TexLaw's Avatar
Recipes 
 
Sep 2007
Houston, Texas
Posts: 3,670
Liked 28 Times on 26 Posts


It sounds like you have some strained yeast that is kicking off extra esters. I agree that it is due to the washed yeast. Dry yeast goes through a lot more grief than liquid yeast does, so it is less a candidate for washing and repitching.


TL
__________________
Beer is good for anything from hot dogs to heartache.

Drinking Frog Brewery, est. 1993

 
Reply With Quote
Old 04-15-2008, 01:30 PM   #10
Dr_Deathweed
 
Dr_Deathweed's Avatar
Recipes 
 
Jul 2007
Bryan, Texas
Posts: 2,381
Liked 46 Times on 40 Posts


Along the same lines, I have a batch of a summit IPA that smells STRONGLY of bananas. I used a new pack of Nottingham, fermented at ~65-68 (may have gotten up to 70-71 during active fermentation,) I have fermented Nottingham MUCH warmer than that before, and I had a batch of Hobgoblin fermenting with Nottingham at the same time that came out fine. I am hoping the flavor/smell will mellow a little with time but it is still kinda frustrating. Still haven't figured out what the problem with that batch is...
__________________
"Never ascribe to malice that which can be adequately explained by incompetence." - Napoleon Bonaparte
“An intelligent man is sometimes forced to be drunk to spend time with his fools.” - Ernest Hemingway

Fermentation CabinetAdding Faucets to a TowerDIY HopbackPortable Kegerator

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
QUICK! HELP! Is my WL Yeast Sample Contaminated? imaguitargod Recipes/Ingredients 3 09-13-2009 08:36 PM
Yeast Isolation from Contaminated Batch Scut_Monkey Brew Science 5 06-26-2009 03:43 AM
Super Banana and clove flavor Rhymenoceros Beginners Beer Brewing Forum 5 03-27-2009 03:40 AM
Banana Flavor OrvilleOrdinary Beginners Beer Brewing Forum 7 10-24-2008 01:44 AM
First Brew Temp and Banana Flavor - What's Next? chase Beginners Beer Brewing Forum 9 08-21-2007 03:08 PM


Forum Jump