Happy HolidaySs Giveaway - Winners Re-Re-Drawn - 24 hours to Claim!

Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Purple beer, purple gunk
Reply
 
LinkBack Thread Tools
Old 02-13-2008, 09:02 PM   #1
oooFishy
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2006
Posts: 86
Default Purple beer, purple gunk

A while ago I decided to primary in a couple of 5 gal sanitized + purged cornies. I fitted airlocks for the primary fermentation with a tight wrap of electrical and duct tape to make a seal, and once bubbling subsided I refitted the pressure release valves. Throughout the rest of fermentation I released pressure from the kegs from the valves, either due to continued fermentation or dissolved c02. They sat in the kegs for about a month. I then transferred to purged + sanitized buckets. I noticed the beer had gotten much darker. When I went to carbonate I realized that the beer had turned a winey, purple color. A thick slurry of purple gunk was left behind. I took a sample of the slurry and spun it down in a centrifuge to find a small white pellet among the purple gunk, indicated that the yeast itself was not purple.

I'm assuming I got a contamination from the kegs....It's strange that the exact same thing happened to both of my beers. I'm thinking that by releasing pressure all the time I let nasties get in the beer. It tastes slightly vinegary...

Any ideas?

__________________
oooFishy is offline
 
Reply With Quote Quick reply to this message
Old 02-13-2008, 09:22 PM   #2
Guinness71
HBT_LIFETIMESUPPORTER.png
Feedback Score: 0 reviews
 
Guinness71's Avatar
Recipes 
 
Join Date: Nov 2007
Location: California
Posts: 192
Default

Umm - I wanna see a picture of the purple beer!

__________________
Guinness71 is offline
 
Reply With Quote Quick reply to this message
Old 02-13-2008, 09:37 PM   #3
Germey
Feedback Score: 0 reviews
 
Germey's Avatar
Recipes 
 
Join Date: Sep 2007
Location: Rancho Bernardo, CA
Posts: 698
Liked 2 Times on 2 Posts

Default

in relatively low concentrations, Iodophor will turn proteins purple. Any chance you had some iodophor solution in the kegs?

Germey is offline
 
Reply With Quote Quick reply to this message
Old 02-13-2008, 09:59 PM   #4
sirsloop
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2006
Location: South River, NJ
Posts: 2,592
Liked 17 Times on 15 Posts
Likes Given: 1

Default

If you put fruit juice in starsan water it turns purple...

__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
~~~~~~~~~~~___//_ ____________________________~~~~~~~~~~~
~~~~~~~~~_/ [][]| | /```\/```\/```\/```\/```\ |~~~~~~~~~~
~~~~~~~_/_______| |____NOW TRIPLE HOPPED______|~~~~~~~~~~
~~~___/[_]| 00 /| | \,,,/\,,,/\,,,/\,,,/\,,,/ |~~~~~~~~~~
~~|___|___|___/_| |___________________________|~~~~~~~~~~
~~|=(*)[________]==(*)(*)=| \________/=(*)(*)=|~~~~~~~~~~
sirsloop is offline
 
Reply With Quote Quick reply to this message
Old 12-03-2014, 05:08 AM   #5
TreAdidas
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2013
Location: Denver, Colorado
Posts: 13
Likes Given: 3

Default

OK I am going to spin this back up because I think the same thing is happening to me.

Situation is I keg a beer and all is going splendidly. Keg carbs up in a week or so (set it and forget it style), beer pours fine we are happy. Then I let the keg sit for a couple of weeks and all of a sudden I go to pull a pint and the beer has gone from the normal golden color one would expect from a primarily 2-row base to some purplish/brownish murky poo water (see pic).

But the plot thickens…. this has happened to me on TWO separate brews. Both on the same keg. And these are the only two beers I have put in this keg as I recently expanded my setup. Further, when I dumped the first batch this happened to, there was a thick goop that coated the keg walls. Sounds very similar to the OP's situation. Is there any reason that a keg would somehow interact with the beer to cause this? Is there some off chance that this keg (which I bought used) was used for some odd purposes in its previous life that would render it useless for beer?

Now before you go asking, I am absolutely crazy about sanitation. I am keeping Five Star in business with all of the PBW and Star San I buy. Further, I also redid all of the o-rings on this keg.

In any case, this keg is going on an indefinite timeout until I can figure this out.

Any ideas?

img_0319.jpg  
__________________
TreAdidas is offline
 
Reply With Quote Quick reply to this message
Old 12-03-2014, 05:14 AM   #6
Devilsnight
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2013
Location: Juneau, WI
Posts: 154
Liked 10 Times on 9 Posts
Likes Given: 1

Default

did you taste it? does it smell wierd?

__________________
Devilsnight is offline
 
Reply With Quote Quick reply to this message
Old 12-03-2014, 05:23 AM   #7
TreAdidas
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2013
Location: Denver, Colorado
Posts: 13
Likes Given: 3

Default

Quote:
Originally Posted by Devilsnight View Post
did you taste it? does it smell wierd?
Yes and yes.

Smell = bad fruit, vinegar, bad wine (joint commentary from my wife and I).
Taste = A very off-putting vinegar. Almost medicinal in nature.

FYI - The recipe I brewed is Kelsey McNair's Hop-Fu! as it appeared in Zymurgy a couple of months ago.
__________________
TreAdidas is offline
 
Reply With Quote Quick reply to this message
Old 12-03-2014, 05:24 AM   #8
OleGoatBrewing
A Genuine Ole Goat
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
OleGoatBrewing's Avatar
Recipes 
 
Join Date: Jan 2014
Location: Ewa Beach, Hawaii
Posts: 82
Liked 18 Times on 6 Posts
Likes Given: 22

Default

Have you made any adjustments to your brew session? I was tweaking my mash process and got a cloudy beer which normally is pretty clean.

__________________
OleGoatBrewing is offline
 
Reply With Quote Quick reply to this message
Old 12-03-2014, 05:28 AM   #9
TreAdidas
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2013
Location: Denver, Colorado
Posts: 13
Likes Given: 3

Default

Quote:
Originally Posted by OleGoatBrewing View Post
Have you made any adjustments to your brew session? I was tweaking my mash process and got a cloudy beer which normally is pretty clean.
Can't say I have.

What's weird is that everything looks and tastes GREAT until it sits in the keg for a few weeks. Then it all goes to hell.
__________________
TreAdidas is offline
 
Reply With Quote Quick reply to this message
Old 12-03-2014, 11:55 AM   #10
bja
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2007
Location: Pittsburgh
Posts: 1,851
Liked 114 Times on 88 Posts

Default

Look up "Acetobacter Infection".

__________________

____________________________________________

I know it just wouldn't be right to kill all the stupid people that we meet, but do you think it would be appropriate to just remove all of the warning labels and let nature take its course?

Life is tough. It's tougher if you're stupid.

bja is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
All-Grain - Purple Headed Porter Calitexcomin Fruit Beer 14 04-04-2014 07:33 PM
AHS Purple Haze Clone BrewinHog Recipes/Ingredients 3 05-21-2012 01:15 AM
Purple Hops Devonian Hops Growing 54 04-14-2011 08:51 PM
Ph Strips...what does pink/purple mean? Yambor44 Equipment/Sanitation 4 10-01-2009 09:23 AM
Purple whey? cheesenbeermmm Cheese Making Forum 2 06-20-2009 07:18 PM



Newest Threads

LATEST SPONSOR DEALS