Electric Brewing Supply 30A BCS Giveaway!


Home Brew Forums > Home Brewing Beer > Fermentation & Yeast > Attenuation question - fermenting in corny
Reply
 
LinkBack Thread Tools
Old 10-31-2009, 04:47 PM   #1
Hugh_Jass
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2008
Posts: 1,961
Liked 28 Times on 27 Posts
Likes Given: 15

Default Attenuation question - fermenting in corny

Question for those who ferment in corny kegs.

The past three beers brewed have been fermented in cornys using fermcap as foam control. Each beer has finished high. Nothing else in my process has changed except using foam control and fermenting in a keg. I pitch a proper amount of yeast - either dry (US-05) or liquid (1028 and Denny's fav.) have been used. Each beer has stopped around 1.02 with an OG of 1.050.

I'm struggling to explain why the yeast are pooping out early.

Any input would be appreciated.

__________________
Quote:
"My new company is going to sell Aqua-infused(tm), Alphabetamashed(tm), Wortboiled(tm), Multihops Brewed(tm), Saccharomented(tm), Lageriffic(tm) beer. - Bobby_M
Pigs are fantastic creatures. They convert vegetables into bacon.
Hugh_Jass is offline
 
Reply With Quote Quick reply to this message
Old 10-31-2009, 05:54 PM   #2
78kombi
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Location: North Central Mass
Posts: 209
Liked 1 Times on 1 Posts

Default

not enough aeration and too much c02?

__________________

BrewBus

78kombi is offline
 
Reply With Quote Quick reply to this message
Old 10-31-2009, 06:18 PM   #3
Hugh_Jass
Feedback Score: 0 reviews
Recipes 
 
Join Date: Nov 2008
Posts: 1,961
Liked 28 Times on 27 Posts
Likes Given: 15

Default

Not enough aeration - maybe. When I rack from BK, wort goes through a strainer and funnel. There's a bunch of foam on the wort. Looked similar to when I was using buckets. Might have to invest in an O2 canister and rig something up, though.


Too much CO2 - probably not. I put a blowoff on the gas in post. It works like a regular blow-off tube. There's very little, if any, pressure in the keg from off-gassing.

Has anyone else experienced poor attenuation when using a corny as a fermentation vessal?

__________________
Quote:
"My new company is going to sell Aqua-infused(tm), Alphabetamashed(tm), Wortboiled(tm), Multihops Brewed(tm), Saccharomented(tm), Lageriffic(tm) beer. - Bobby_M
Pigs are fantastic creatures. They convert vegetables into bacon.

Hugh_Jass is offline
 
Reply With Quote Quick reply to this message
Old 12-18-2010, 10:25 PM   #4
xxHelderxx
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2006
Posts: 102
Default

I'm having a similar problem- I know this thread is crazy old- but were you able to fix this?

__________________
xxHelderxx is offline
 
Reply With Quote Quick reply to this message
Old 12-18-2010, 11:08 PM   #5
PT Ray
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2005
Posts: 1,372
Liked 6 Times on 6 Posts

Default

Corny's are too narrow to make a good fermenter. You run into problems with fermentation. If I remember it has to do with the limited surface area and the length causes additional pressure on the yeast sitting on the bottom.

__________________
PT Ray is offline
 
Reply With Quote Quick reply to this message
Old 12-19-2010, 12:04 AM   #6
xxHelderxx
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2006
Posts: 102
Default

But people have fermented in them and some people swear by them. what are they doing that I'm not? I'm confused how some people can do it successfully.

__________________
xxHelderxx is offline
 
Reply With Quote Quick reply to this message
Old 12-19-2010, 12:43 AM   #7
PT Ray
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2005
Posts: 1,372
Liked 6 Times on 6 Posts

Default

Check out the BrewStrong podcast about fermentors. I believe that's where they go into detail with the issues of using a corny. What exactly makes a corny attractive as a fermentor?

__________________
PT Ray is offline
 
Reply With Quote Quick reply to this message
Old 12-19-2010, 01:04 AM   #8
El_Exorcisto
Feedback Score: 0 reviews
Recipes 
 
Join Date: Aug 2010
Location: Herkimer, NY
Posts: 417
Liked 6 Times on 6 Posts

Default

Bigger surface area makes for much happier top-fermenting yeast. There was a study done of hefeweizen breweries but I for the life of me can't find the address. They found long cylinders typically made for unhappy yeast. I also wonder about using fermcaps and knocking down the krausen, when that is where the majority of the work is done by ale yeasts... You could just be stacking too many sub-optimal practices on top of each other to the point where the yeast is going to sleep early.

__________________
El_Exorcisto is offline
 
Reply With Quote Quick reply to this message
Old 12-19-2010, 01:31 AM   #9
xxHelderxx
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jul 2006
Posts: 102
Default

There's a 14ish page thread on here about the benefits of using cornies as fermenters. Basicaly they work really well for me because I have limited space, can fit a bunch in my fermentation cooler, they're light proof, easy to transport with the handle on there, and I can reduce exposure to air and transfer it from primary/secondary/serving using CO2. I don't use fermcap, I take a poppet off and use a blow off tube. I dont know what I did differently from the others on here that have done it successfully but I've got 15 gallons of like 4% abv beer lol.

__________________
xxHelderxx is offline
 
Reply With Quote Quick reply to this message
Old 12-19-2010, 02:09 AM   #10
HoppedIPA
Feedback Score: 0 reviews
Recipes 
 
Join Date: Apr 2009
Location: Overland Park, Ks, Kansas
Posts: 193
Liked 1 Times on 1 Posts
Likes Given: 28

Default

just throwing darts in the air.. but maybe your temps are too low?

__________________

i got beer in the keg thats what matters!
OH and dont forget ..SWMBO = She Who Must Be Obeyed, i.e. wife for me..

HoppedIPA 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
Primary Fermenting in a Corny Keg Hugh_Jass General Techniques 192 10-25-2013 07:55 AM
Fermenting in a corny Ryan_PA Equipment/Sanitation 11 08-05-2011 02:06 PM
Fermenting temp. and attenuation... Gizmo Beginners Beer Brewing Forum 3 02-17-2009 10:02 PM
Fermenting in a Corny? Ego Archive Wine Making Forum 6 09-27-2008 03:46 PM
Attenuation Question Drew General Techniques 3 11-24-2006 05:50 PM